Remove ZKP authentication possibility, a=chris

diff --git a/src/configs/Config.php b/src/configs/Config.php
index c70d51405..ae87359e8 100755
--- a/src/configs/Config.php
+++ b/src/configs/Config.php
@@ -158,7 +158,7 @@ function nsconddefine($constant, $value)
  * Version number for upgrade database function
  * @var int
  */
-nsdefine('DATABASE_VERSION', 68);
+nsdefine('DATABASE_VERSION', 69);
 /**
  * Minimum Version fo Yioop for which keyword ad script
  * still works with this version
@@ -375,20 +375,12 @@ nsdefine('FALLBACK_LOCALE_DIR', BASE_DIR . "/locale");
 nsdefine('HASH_CAPTCHA', 2);
 /** Captcha mode indicating to use a classic image based captcha*/
 nsdefine('IMAGE_CAPTCHA', 3);
-/** Authentication Mode Possibility*/
-nsdefine('NORMAL_AUTHENTICATION', 1);
-/** Authentication Mode Possibility*/
-nsdefine('ZKP_AUTHENTICATION', 2);
 /** */
 nsdefine('NO_RECOVERY', 0);
 /** */
 nsdefine('EMAIL_RECOVERY', 1);
 /** */
 nsdefine('EMAIL_AND_QUESTIONS_RECOVERY', 2);
-/** If ZKP Authentication via Fiat Shamir Protocol used how many iterations
- * to do
- */
-nsconddefine('FIAT_SHAMIR_ITERATIONS', 20);
 if (file_exists(WORK_DIRECTORY . PROFILE_FILE_NAME)) {
     if ((file_exists(WORK_DIRECTORY . "/locale/en-US") &&
         !file_exists(WORK_DIRECTORY . "/locale/en_US"))
@@ -435,7 +427,6 @@ if (file_exists(WORK_DIRECTORY . PROFILE_FILE_NAME)) {
     }
     /** @ignore */
     nsconddefine('PROFILE', false);
-    nsdefine('AUTHENTICATION_MODE', NORMAL_AUTHENTICATION);
     nsdefine('RECOVERY_MODE', EMAIL_RECOVERY);
     nsconddefine('DEBUG_LEVEL', NO_DEBUG_INFO);
     nsdefine('USE_FILECACHE', false);
@@ -1118,8 +1109,6 @@ nsdefine('MAX_IP_ADDRESS_AS_STRING_LEN', 39);
 nsdefine('NUM_FIELD_LEN', 4);
 /** Length for writing mode in locales */
 nsdefine('WRITING_MODE_LEN', 5);
-/** Length of zero knowledge password string */
-nsdefine('ZKP_PASSWORD_LEN', 200);
 /** Max user session size */
 nsdefine('MAX_USER_SESSION_SIZE', 16384);
 /*
diff --git a/src/configs/Createdb.php b/src/configs/Createdb.php
index fdb5a35a3..fb924e544 100755
--- a/src/configs/Createdb.php
+++ b/src/configs/Createdb.php
@@ -124,24 +124,13 @@ $creation_time = L\microTimestamp();
 //numerical value of the blank password
 $profile = $profile_model->getProfile(WORK_DIRECTORY);
 $new_profile = $profile;
-$new_profile['FIAT_SHAMIR_MODULUS'] = L\generateFiatShamirModulus();
 $profile_model->updateProfile(WORK_DIRECTORY, $new_profile, $profile);
-if ($new_profile['FIAT_SHAMIR_MODULUS']) {
-    $sha1_of_blank_string =  L\bchexdec(sha1(''));
-    //calculating V  = S ^ 2 mod N
-    $temp = bcpow($sha1_of_blank_string . '', '2');
-    $zkp_password = ($new_profile['FIAT_SHAMIR_MODULUS']) ?
-        bcmod($temp, $new_profile['FIAT_SHAMIR_MODULUS']) : "";
-} else {
-    $sha1_of_blank_string = "";
-    $zkp_password = "";
-}
 //default account is root without a password
 $sql ="INSERT INTO USERS VALUES (" . ROOT_ID . ", 'admin', 'admin','" .
         ROOT_USERNAME . "',
         'root@dev.null', '".L\crawlCrypt('')."', '".ACTIVE_STATUS.
         "', '".L\crawlCrypt(ROOT_USERNAME . AUTH_KEY . $creation_time).
-        "', 0,'$creation_time', 0, '$zkp_password')";
+        "', 0,'$creation_time', 0)";
 $db->execute($sql);
 /* public account is an inactive account for used for public permissions
    default account is root without a password
@@ -149,7 +138,7 @@ $db->execute($sql);
 $sql ="INSERT INTO USERS VALUES (".PUBLIC_USER_ID.", 'all', 'all','public',
         'public@dev.null', '".L\crawlCrypt('')."', '".INACTIVE_STATUS.
         "', '".L\crawlCrypt('public' . AUTH_KEY . $creation_time)."', 0,
-        '$creation_time', 0, '$zkp_password')";
+        '$creation_time', 0)";
 $db->execute($sql);
 //default public group with group id 1
 $creation_time = L\microTimestamp();
diff --git a/src/controllers/AdminController.php b/src/controllers/AdminController.php
index 5ac35309c..14f28f5a4 100755
--- a/src/controllers/AdminController.php
+++ b/src/controllers/AdminController.php
@@ -123,104 +123,56 @@ class AdminController extends Controller implements CrawlConstants
                     tl('admin_controller_need_cookies') . "</h1>');";
                 unset($_SESSION['USER_ID']);
             } else if ($this->checkSignin()) {
-                if (!isset($_SESSION['AUTH_COUNT']) ||
-                    isset($_REQUEST['round_num']) &&
-                    $_REQUEST['round_num'] < $_SESSION['AUTH_COUNT']) {
-                    $_SESSION['AUTH_COUNT'] = 0;
-                }
-                if (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) {
-                    $_SESSION['AUTH_COUNT']++;
-                    if ($_SESSION['AUTH_COUNT'] != C\FIAT_SHAMIR_ITERATIONS) {
-                        $_SESSION['SALT_VALUE'] = rand(0, 1);
-                        $salt_value = $_SESSION['SALT_VALUE'];
-                        if ($_SESSION['AUTH_COUNT'] ==
-                            C\FIAT_SHAMIR_ITERATIONS - 1) {
-                            $salt_value = "done" . $salt_value;
-                        }
-                        e($salt_value);
-                        \seekquarry\yioop\library\webExit();
-                    }
-                } else {
-                    /*
-                        if not doing Fiat Shamir pretend have gone through all
-                        needed iterations
-                     */
-                    $_SESSION['AUTH_COUNT'] = C\FIAT_SHAMIR_ITERATIONS;
-                }
                 $_SESSION['USER_NAME'] = $_REQUEST['u'];
                 // successful login.
-                if ($_SESSION['AUTH_COUNT'] == C\FIAT_SHAMIR_ITERATIONS) {
-                    $_SESSION['AUTH_COUNT'] = 0;
-                    $user_id = $this->model("signin")->getUserId(
-                        $this->clean($_REQUEST['u'], "string"));
-                    $session = $this->model("user")->getUserSession($user_id);
-                    $_SESSION['USER_NAME'] = $_REQUEST['u'];
-                    if (isset($_SESSION['LAST_ACTIVITY']) &&
-                        is_array($_SESSION['LAST_ACTIVITY'])) {
-                        $_REQUEST = array_merge($_REQUEST,
-                            $_SESSION['LAST_ACTIVITY']);
-                    }
-                    if (is_array($session)) {
-                        $_SESSION = $session;
-                    }
-                    $allowed_activities =
-                        $this->model("user")->getUserActivities($user_id);
-                    // now don't want to use remote address anymore
-                    if (empty($allowed_activities)) {
-                        unset($_SESSION['USER_ID']);
-                        unset($_REQUEST);
-                        $_REQUEST['c'] = "admin";
-                        return $this->redirectWithMessage(
-                            tl('admin_controller_account_not_active'));
-                    } else {
-                        $_SESSION['USER_ID'] = $user_id;
-                        $_REQUEST[C\CSRF_TOKEN] = $this->generateCSRFToken(
-                            $_SESSION['USER_ID']);
-                        $preserve_array = [];
-                        if (!empty($_REQUEST['preserve']) &&
-                            $_REQUEST['preserve'] == 'true') {
-                            $preserve_array = [
-                                'a','arg', 'filter', 'group_id',
-                                'just_group_id', 'visible_users', 'user_filter'
-                                ];
-                        }
-                        return $this->redirectWithMessage(
-                            tl('admin_controller_login_successful'),
-                            $preserve_array);
-                    }
+                $user_id = $this->model("signin")->getUserId(
+                    $this->clean($_REQUEST['u'], "string"));
+                $session = $this->model("user")->getUserSession($user_id);
+                $_SESSION['USER_NAME'] = $_REQUEST['u'];
+                if (isset($_SESSION['LAST_ACTIVITY']) &&
+                    is_array($_SESSION['LAST_ACTIVITY'])) {
+                    $_REQUEST = array_merge($_REQUEST,
+                        $_SESSION['LAST_ACTIVITY']);
                 }
-            } else {
-                $alt_message = false;
-                $_SESSION['AUTH_COUNT'] = 0;
-                if (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION
-                    && !isset($_SESSION['AUTH_FAILED'])) {
-                    if (isset($_REQUEST['round_num'])) {
-                        $_SESSION['SALT_VALUE'] = 1;
-                        $_SESSION['AUTH_FAILED'] = -1;
-                        e($_SESSION['AUTH_FAILED']);
-                        \seekquarry\yioop\library\webExit();
-                    } else {
-                        unset($_SESSION['USER_ID']);
-                        unset($_SESSION['AUTH_FAILED']);
-                        unset($_REQUEST);
-                        $_REQUEST['c'] = "admin";
-                        return $this->redirectWithMessage(
-                            tl('admin_controller_no_back_button'));
-                    }
+                if (is_array($session)) {
+                    $_SESSION = $session;
                 }
-                if (!$alt_message) {
+                $allowed_activities =
+                    $this->model("user")->getUserActivities($user_id);
+                // now don't want to use remote address anymore
+                if (empty($allowed_activities)) {
                     unset($_SESSION['USER_ID']);
-                    unset($_SESSION['AUTH_FAILED']);
-                    $login_attempted = false;
-                    if (isset($_REQUEST['u'])) {
-                        $login_attempted = true;
-                    }
                     unset($_REQUEST);
                     $_REQUEST['c'] = "admin";
-                    if ($login_attempted) {
-                        return $this->redirectWithMessage(
-                            tl('admin_controller_login_failed'));
+                    return $this->redirectWithMessage(
+                        tl('admin_controller_account_not_active'));
+                } else {
+                    $_SESSION['USER_ID'] = $user_id;
+                    $_REQUEST[C\CSRF_TOKEN] = $this->generateCSRFToken(
+                        $_SESSION['USER_ID']);
+                    $preserve_array = [];
+                    if (!empty($_REQUEST['preserve']) &&
+                        $_REQUEST['preserve'] == 'true') {
+                        $preserve_array = [
+                            'a','arg', 'filter', 'group_id',
+                            'just_group_id', 'visible_users', 'user_filter'
+                            ];
                     }
+                    return $this->redirectWithMessage(
+                        tl('admin_controller_login_successful'),
+                        $preserve_array);
+                }
+            } else {
+                unset($_SESSION['USER_ID']);
+                $login_attempted = false;
+                if (isset($_REQUEST['u'])) {
+                    $login_attempted = true;
+                }
+                unset($_REQUEST);
+                $_REQUEST['c'] = "admin";
+                if ($login_attempted) {
+                    return $this->redirectWithMessage(
+                        tl('admin_controller_login_failed'));
                 }
             }
         } else if ($this->checkCSRFToken(C\CSRF_TOKEN, "config")) {
@@ -238,14 +190,6 @@ class AdminController extends Controller implements CrawlConstants
             $data["ADMIN"] = false;
         }
         if ($view == 'signin') {
-            if (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) {
-                $data['AUTH_ITERATION'] = C\FIAT_SHAMIR_ITERATIONS;
-                $data['FIAT_SHAMIR_MODULUS'] = C\FIAT_SHAMIR_MODULUS;
-                $_SESSION['SALT_VALUE'] = rand(0, 1);
-                $data['INCLUDE_SCRIPTS'] = ["zkp", "big_int", "sha1"];
-            } else {
-                 unset($_SESSION['SALT_VALUE']);
-            }
             $data[C\CSRF_TOKEN] = $this->generateCSRFToken(
                 L\remoteAddress());
             $data['SCRIPT'] .= "var u; if ((u = elt('username')) && u.focus) ".
@@ -280,28 +224,11 @@ class AdminController extends Controller implements CrawlConstants
      */
     public function checkSignin()
     {
-        if (C\AUTHENTICATION_MODE == C\NORMAL_AUTHENTICATION) {
-            $result = false;
-            if (isset($_REQUEST['u']) && isset($_REQUEST['p']) ) {
-                $result = $this->model("signin")->checkValidSignin(
-                    $this->clean($_REQUEST['u'], "string"),
-                    $this->clean($_REQUEST['p'], "string") );
-            }
-        } else {
-            if (!isset($_REQUEST['u']) || !isset($_REQUEST['x']) ||
-                !isset($_REQUEST['y']) || !isset($_SESSION['SALT_VALUE']) ||
-                isset($_SESSION['AUTH_FAILED'])) {
-                $result = false;
-            } else {
-                $result = $this->model("signin")->checkValidSigninForZKP(
-                    $this->clean($_REQUEST['u'], "string"),
-                    $this->clean($_REQUEST['x'], "string"),
-                    $this->clean($_REQUEST['y'], "string"),
-                    $_SESSION['SALT_VALUE'], C\FIAT_SHAMIR_MODULUS);
-            }
-            if (!$result) {
-                $_SESSION['AUTH_COUNT'] = 0;
-            }
+        $result = false;
+        if (isset($_REQUEST['u']) && isset($_REQUEST['p']) ) {
+            $result = $this->model("signin")->checkValidSignin(
+                $this->clean($_REQUEST['u'], "string"),
+                $this->clean($_REQUEST['p'], "string") );
         }
         return $result;
     }
diff --git a/src/controllers/RegisterController.php b/src/controllers/RegisterController.php
index 31c6a861b..ef20607a0 100755
--- a/src/controllers/RegisterController.php
+++ b/src/controllers/RegisterController.php
@@ -192,14 +192,6 @@ class RegisterController extends Controller implements CrawlConstants
             $visitor_model->updateVisitor(
                 L\remoteAddress(), "captcha_time_out");
         }
-        if (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) {
-            $_SESSION['SALT_VALUE'] = rand(0, 1);
-            $data['AUTH_ITERATION'] = C\FIAT_SHAMIR_ITERATIONS;
-            $data['FIAT_SHAMIR_MODULUS'] = C\FIAT_SHAMIR_MODULUS;
-            $data['INCLUDE_SCRIPTS'] = ["sha1", "zkp", "big_int"];
-        } else {
-            unset($_SESSION['SALT_VALUE']);
-        }
         if (C\CAPTCHA_MODE == C\HASH_CAPTCHA) {
             if (!isset($data['INCLUDE_SCRIPTS'])) {
                 $data['INCLUDE_SCRIPTS']= [];
@@ -274,28 +266,16 @@ class RegisterController extends Controller implements CrawlConstants
         switch (C\REGISTRATION_TYPE) {
             case 'no_activation':
                 $data['REFRESH'] = "signin";
-                if (C\AUTHENTICATION_MODE == C\NORMAL_AUTHENTICATION) {
-                    $user_model->addUser($data['USER'], $data['PASSWORD'],
-                        $data['FIRST'], $data['LAST'], $data['EMAIL']);
-                } else {
-                    $user_model->addUser($data['USER'], '',
-                        $data['FIRST'], $data['LAST'], $data['EMAIL'],
-                        C\ACTIVE_STATUS, $data['PASSWORD']);
-                }
+                $user_model->addUser($data['USER'], $data['PASSWORD'],
+                    $data['FIRST'], $data['LAST'], $data['EMAIL']);
                 $data['SCRIPT'] .= "doMessage('<h1 class=\"red\" >".
                     tl('register_controller_account_created')."</h1>')";
                 break;
             case 'email_registration':
                 $data['REFRESH'] = "signin";
-                if (C\AUTHENTICATION_MODE == C\NORMAL_AUTHENTICATION) {
-                    $user_model->addUser($data['USER'], $data['PASSWORD'],
-                        $data['FIRST'], $data['LAST'], $data['EMAIL'],
-                        C\INACTIVE_STATUS);
-                } else {
-                    $user_model->addUser($data['USER'], '',
-                        $data['FIRST'], $data['LAST'], $data['EMAIL'],
-                        C\INACTIVE_STATUS, $data['PASSWORD']);
-                }
+                $user_model->addUser($data['USER'], $data['PASSWORD'],
+                    $data['FIRST'], $data['LAST'], $data['EMAIL'],
+                    C\INACTIVE_STATUS);
                 $user = $user_model->getUser($data['USER']);
                 $this->sendActivationMail($user, $data);
                 if (C\RECOVERY_MODE == C\EMAIL_AND_QUESTIONS_RECOVERY) {
@@ -312,15 +292,9 @@ class RegisterController extends Controller implements CrawlConstants
                 break;
             case 'admin_activation':
                 $data['REFRESH'] = "signin";
-                if (C\AUTHENTICATION_MODE == C\NORMAL_AUTHENTICATION) {
-                    $user_model->addUser($data['USER'], $data['PASSWORD'],
-                        $data['FIRST'], $data['LAST'], $data['EMAIL'],
-                        C\INACTIVE_STATUS);
-                } else {
-                    $user_model->addUser($data['USER'], '',
-                        $data['FIRST'], $data['LAST'], $data['EMAIL'],
-                        C\INACTIVE_STATUS, $data['PASSWORD']);
-                }
+                $user_model->addUser($data['USER'], $data['PASSWORD'],
+                    $data['FIRST'], $data['LAST'], $data['EMAIL'],
+                    C\INACTIVE_STATUS);
                 $data['SCRIPT'] .= "doMessage('<h1 class=\"red\" >".
                     tl('register_controller_account_request_made')."</h1>');";
                 $server = new MailServer(C\MAIL_SENDER, C\MAIL_SERVER,
@@ -822,13 +796,6 @@ class RegisterController extends Controller implements CrawlConstants
         foreach ($fields as $field) {
             $data[strtoupper($field)] = "";
         }
-        if (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) {
-            $data['AUTHENTICATION_MODE'] = C\ZKP_AUTHENTICATION;
-            $data['INCLUDE_SCRIPTS'] = ["sha1", "zkp"," big_int",
-                "register_validator"];
-        } else {
-            $data['AUTHENTICATION_MODE'] = C\NORMAL_AUTHENTICATION;
-        }
         if (C\CAPTCHA_MODE == C\HASH_CAPTCHA) {
             $data['INCLUDE_SCRIPTS'] = array_unique(
                 array_merge($data['INCLUDE_SCRIPTS'],
@@ -1142,11 +1109,9 @@ class RegisterController extends Controller implements CrawlConstants
                 }
             }
         }
-        $max_password_len = (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) ?
-            C\LONG_NAME_LEN *2 : C\LONG_NAME_LEN;
         if (isset($_REQUEST['password'])
             && isset($_REQUEST['repassword']) &&
-            (strlen($_REQUEST['password']) > $max_password_len
+            (strlen($_REQUEST['password']) > C\LONG_NAME_LEN
             || $this->clean($_REQUEST['password'], "string" ) !=
             $this->clean($_REQUEST['repassword'], "string" ))) {
             $error = true;
diff --git a/src/controllers/components/AccountaccessComponent.php b/src/controllers/components/AccountaccessComponent.php
index bb74d356a..4d213c1e1 100644
--- a/src/controllers/components/AccountaccessComponent.php
+++ b/src/controllers/components/AccountaccessComponent.php
@@ -108,9 +108,6 @@ class AccountaccessComponent extends Component
             if ($_REQUEST['edit_pass'] == "true") {
                 $data['EDIT_USER'] = true;
                 $data['EDIT_PASSWORD'] = true;
-                $data['AUTHENTICATION_MODE'] = C\AUTHENTICATION_MODE;
-                $data['FIAT_SHAMIR_MODULUS'] = C\FIAT_SHAMIR_MODULUS;
-                $data['INCLUDE_SCRIPTS'] = ["sha1", "zkp", "big_int"];
             } else {
                 $data['EDIT_USER'] = true;
             }
@@ -235,10 +232,7 @@ class AccountaccessComponent extends Component
             case "updateuser":
                 if (isset($_REQUEST['new_password']) ) {
                     $pass_len = strlen($_REQUEST['new_password']);
-                    if ($pass_len > C\ZKP_PASSWORD_LEN ||
-                        (C\AUTHENTICATION_MODE != C\ZKP_AUTHENTICATION &&
-                            $pass_len > C\LONG_NAME_LEN
-                        )) {
+                    if ($pass_len > C\LONG_NAME_LEN) {
                         return $parent->redirectWithMessage(
                             tl('accountaccess_component_passwords_too_long'),
                             ["edit", "edit_pass"]);
@@ -261,15 +255,9 @@ class AccountaccessComponent extends Component
                         ["edit", "edit_pass"]);
                 }
                 if (isset($data['EDIT_PASSWORD'])) {
-                    if (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) {
-                        $signin_model->changePasswordZKP($username,
-                            $parent->clean($_REQUEST['new_password'],
-                            "string"));
-                    } else {
-                        $signin_model->changePassword($username,
-                            $parent->clean($_REQUEST['new_password'],
-                            "string"));
-                    }
+                    $signin_model->changePassword($username,
+                        $parent->clean($_REQUEST['new_password'],
+                        "string"));
                 }
                 $user = [];
                 $user['USER_ID'] = $user_id;
@@ -371,16 +359,6 @@ class AccountaccessComponent extends Component
     public function manageUsers()
     {
         $parent = $this->parent;
-        if (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) {
-            $_SESSION['SALT_VALUE'] = rand(0, 1);
-            $_SESSION['AUTH_COUNT'] = 1;
-            $data['INCLUDE_SCRIPTS'] = ["sha1", "zkp", "big_int"];
-            $data['AUTHENTICATION_MODE'] = C\ZKP_AUTHENTICATION;
-            $data['FIAT_SHAMIR_MODULUS'] = C\FIAT_SHAMIR_MODULUS;
-        } else {
-            $data['AUTHENTICATION_MODE'] = C\NORMAL_AUTHENTICATION;
-            unset($_SESSION['SALT_VALUE']);
-        }
         $request_fields = ['start_row', 'num_show', 'end_row',
             'visible_roles', 'visible_groups', 'role_filter', 'role_sorts',
             'group_filter', 'group_sorts', 'role_limit', 'group_limit',
@@ -450,9 +428,7 @@ class AccountaccessComponent extends Component
                 strlen($_REQUEST['new_password']) : 0;
             switch ($arg) {
                 case "adduser":
-                    if ($pass_len > C\ZKP_PASSWORD_LEN ||
-                        (C\AUTHENTICATION_MODE != C\ZKP_AUTHENTICATION &&
-                            $pass_len > C\LONG_NAME_LEN )) {
+                    if ($pass_len > C\LONG_NAME_LEN ) {
                         return $parent->redirectWithMessage(
                             tl('accountaccess_component_passwords_too_long'),
                             $request_fields);
@@ -474,16 +450,9 @@ class AccountaccessComponent extends Component
                         $_REQUEST['status'] = C\INACTIVE_STATUS;
                     } else {
                         $norm_password = "";
-                        $zkp_password = "";
-                        if (C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) {
-                            $zkp_password =
-                                substr($parent->clean($_REQUEST['password'],
-                                    "string"), 0, C\ZKP_PASSWORD_LEN);
-                        } else {
-                            $norm_password =
-                                substr($parent->clean($_REQUEST['password'],
-                                "string"), 0, C\LONG_NAME_LEN);
-                        }
+                        $norm_password =
+                            substr($parent->clean($_REQUEST['password'],
+                            "string"), 0, C\LONG_NAME_LEN);
                         $username = trim($username);
                         $user_model->addUser($username, $norm_password,
                             substr(trim($parent->clean($_REQUEST['first_name'],
@@ -528,12 +497,6 @@ class AccountaccessComponent extends Component
                                     $_REQUEST[$field], "string");
                                 if ($tmp != $user[$upper_field]) {
                                     $user[$upper_field] = $tmp;
-                                     if (C\AUTHENTICATION_MODE ==
-                                        C\ZKP_AUTHENTICATION && $upper_field
-                                        == "PASSWORD") {
-                                        $user["ZKP_PASSWORD"] = $tmp;
-                                        $user[$upper_field] ='';
-                                    }
                                     if (!isset($_REQUEST['change_filter'])) {
                                         $update = true;
                                     }
diff --git a/src/controllers/components/SystemComponent.php b/src/controllers/components/SystemComponent.php
index bd47eff5a..79d2b447d 100755
--- a/src/controllers/components/SystemComponent.php
+++ b/src/controllers/components/SystemComponent.php
@@ -855,20 +855,6 @@ EOD;
            C\EMAIL_AND_QUESTIONS_RECOVERY =>
                tl('system_component_email_questions'),
             ];
-        if (C\FIAT_SHAMIR_MODULUS != "") {
-            $data['AUTHENTICATION_MODES'] = [
-                    C\NORMAL_AUTHENTICATION =>
-                       tl('system_component_normal_authentication'),
-                    C\ZKP_AUTHENTICATION =>
-                       tl('system_component_zkp_authentication'),
-                ];
-        } else {
-            $data['AUTHENTICATION_MODES'] = [
-                    C\NORMAL_AUTHENTICATION =>
-                       tl('system_component_normal_authentication'),
-                ];
-            $data['ZKP_UNAVAILABLE'] = true;
-        }
         $data['PRIVACY_MODES'] = [
            true =>
                tl('system_component_enable'),
@@ -886,8 +872,7 @@ EOD;
             switch ($_REQUEST['arg']) {
                 case "updatetypes":
                     $change = false;
-                    $mode_fields = ['AUTHENTICATION_MODE',
-                        'AUTOLOGOUT', 'CAPTCHA_MODE',
+                    $mode_fields = ['AUTOLOGOUT', 'CAPTCHA_MODE',
                         'DIFFERENTIAL_PRIVACY', 'GROUP_ANALYTICS_MODE',
                         'RECOVERY_MODE', 'SEARCH_ANALYTICS_MODE'];
                     foreach ($mode_fields as $mode) {
@@ -1196,8 +1181,6 @@ EOD;
                         $profile['AUTH_KEY'] = L\crawlHash(
                             $data['WORK_DIRECTORY'].time());
                         $data['AUTH_KEY'] = $profile['AUTH_KEY'];
-                        $profile['FIAT_SHAMIR_MODULUS'] =
-                            L\generateFiatShamirModulus();
                         $robot_instance = str_replace(".", "_",
                             $_SERVER['SERVER_NAME'])."-".time();
                         $profile['ROBOT_INSTANCE'] = $robot_instance;
diff --git a/src/library/Utility.php b/src/library/Utility.php
index 6d949a3ec..3892d4215 100755
--- a/src/library/Utility.php
+++ b/src/library/Utility.php
@@ -2238,139 +2238,6 @@ function logLineTimestamp($line)
     }
     return 0;
 }
-/**
- * This method generates Fiat-Shamir modulus. It uses
- * openssl public key method to generate the public key and
- * then extract modulus from the public key
- *
- * @return string $dec string representation of modulus
- */
- function generateFiatShamirModulus()
- {
-    $tmp = "";
-    if (function_exists("openssl_pkey_new") &&
-        function_exists("openssl_pkey_get_details") &&
-        function_exists("bcmod")) {
-        $config = [
-            "digest_alg" => "sha256",
-            "public_key_bits" => 1024,
-            "public_key_type" => OPENSSL_KEYTYPE_RSA,
-        ];
-        $res = openssl_pkey_new($config);
-        if ($res) {
-            $pub_key = openssl_pkey_get_details($res);
-            $tmp = bchexdec(bin2hex($pub_key["rsa"]["n"]));
-        }
-    }
-    if (!$tmp && function_exists("bcmod")) {
-        $num_bits = 256;
-        $num_digits = ceil($num_bits * log10(2));
-        $p = randProbablyPrime($num_digits);
-        $q = randProbablyPrime($num_digits);
-        $tmp = bcmul($p, $q);
-    }
-    return $tmp;
-}
-/**
- * Returns a random prime of the given length in decimal
- *
- * @param int $len length of prime to generate in terms of base 10 digits
- * @param int $accuracy the resulting number will be prime with prob
- *     1 - 1/2^($accuracy)
- * @return string a big prime
- */
-function randProbablyPrime($len, $accuracy = 30)
-{
-    $bound = str_pad("", $len, "9");
-    do {
-        $num = bcrand("0", $bound);
-    } while(!probablyPrime($num, $accuracy));
-    return $num;
-}
-/**
- * Check if a big num is a prime or not
- *
- * @param string $num big number to check coded as a long string in decimal
- * @param int $accuracy the resulting number will be prime with prob
- *     1 - 1/2^($accuracy)
- * @param bool whether it is prime or not
- */
-function probablyPrime($num, $accuracy)
-{
-    if (bccomp($num, "2") == 0 || bccomp($num, "3") == 0)
-        return true;
-    if (bccomp($num, "2") < 0 || bcmod($num, "2") == 0) {
-        return false;
-    }
-    $num_less_one = bcsub($num, 1);
-    $d = $num_less_one;
-    $s = 0;
-    while (bcmod($d, "2") == 0) {
-        $d = bcdiv($d, "2");
-        $s++;
-    }
-    for ($i = 0; $i < $accuracy; $i++) {
-        $a = bcrand("2", $num_less_one);
-        $x = bcpowmod($a, $d, $num);
-        if (bccomp($x, "1") == 0 || bccomp($x, $num_less_one) == 0) {
-            continue;
-        }
-        for ($j = 1; $j < $s; $j++) {
-            $x = bcmod(bcmul($x, $x), $num);
-            if (bccomp($x, "1") == 0)
-                return false;
-            if (bccomp($x, $num_less_one) == 0)
-                continue 2;
-        }
-        return false;
-    }
-    return true;
-}
-/**
- * Generates a random big number between the two big number $low and $high
- *
- * @param string $low a decimal coded big num lower bounding the desired
- *     range (inclusive)
- * @param string $high a decimal coded big num upper bounding the desired
- *     range (exclusive)
- */
-function bcrand($low, $high)
-{
-    $range = bcsub($high, $low);
-    if (bccomp($range, "0") <= 0) {
-        return "0";
-    }
-    $len = strlen($range);
-    if (function_exists("openssl_random_pseudo_bytes")) {
-        $tmp = openssl_random_pseudo_bytes($len);
-        $tmp = bchexdec(bin2hex($tmp));
-    } else {
-        $tmp = "";
-        for ($i = 0; $i < $len; $i++) {
-            $tmp .= mt_rand(0, 9);
-        }
-    }
-    $rand_in_range = bcmod($tmp, $range);
-    $out = bcadd($rand_in_range, $low);
-    return $out;
-}
-/**
- * Convert hexadecimal number to decimal using BC math PHP
- * library. It is used to convert very large hex value to decimal value
- *
- * @param string $hex  hexadecimal number
- * @return string $dec string representation of decimal number
- */
-function bchexdec($hex)
-{
-    $dec = 0;
-    $len = strlen($hex);
-    for ($i = 1; $i <= $len; $i++) {
-        $dec = bcadd($dec, bcmul(strval(hexdec($hex[$i - 1])),
-            bcpow('16', strval($len - $i))));
-    }
-    return $dec;
-}
 /**
  * Returns whether an input can be parsed to a positive integer
  *
diff --git a/src/library/VersionFunctions.php b/src/library/VersionFunctions.php
index 165af810b..09c897016 100644
--- a/src/library/VersionFunctions.php
+++ b/src/library/VersionFunctions.php
@@ -481,8 +481,6 @@ function upgradeDatabaseVersion20(&$db)
             $creation_time = microTimestamp();
             $profile = $profile_model->getProfile(C\WORK_DIRECTORY);
             $new_profile = $profile;
-            $new_profile['AUTHENTICATION_MODE'] = C\NORMAL_AUTHENTICATION;
-            $new_profile['FIAT_SHAMIR_MODULUS'] = generateFiatShamirModulus();
             $new_profile['MAIL_SERVER']= "";
             $new_profile['MAIL_PORT']= "";
             $new_profile['MAIL_USERNAME']= "";
@@ -496,9 +494,6 @@ function upgradeDatabaseVersion20(&$db)
             //get current users
             //(assume can fit in memory and doesn't take long)
             $users = [];
-            $sha1_of_upgrade_code = bchexdec(sha1($v20check));
-            $temp = bcpow($sha1_of_upgrade_code . '', '2');
-            $zkp_password = bcmod($temp, $new_profile['FIAT_SHAMIR_MODULUS']);
             $user_tables_sql = ["SELECT USER_NAME FROM USER",
                 "SELECT USER_NAME, FIRST_NAME, LAST_NAME, EMAIL FROM USERS"];
             $i = 0;
@@ -518,15 +513,11 @@ function upgradeDatabaseVersion20(&$db)
                         $users[$i]["EMAIL"] =
                             (isset($users[$i]["EMAIL"])) ?
                             $users[$i]["EMAIL"] : "user$i@dev.null";
-                        /* although not by default using zkp set up so
-                           accounts would work on switch
-                        */
                         $users[$i]["PASSWORD"] = $v20check;
                         $users[$i]["STATUS"] = C\INACTIVE_STATUS;
                         $users[$i]["CREATION_TIME"] = $creation_time;
                         $users[$i]["UPS"] = 0;
                         $users[$i]["DOWNS"] = 0;
-                        $users[$i]["ZKP_PASSWORD"] = $zkp_password;
                         $i++;
                     }
                     unset($users[$i]);
@@ -554,13 +545,11 @@ function upgradeDatabaseVersion20(&$db)
                 foreach ($users as $user) {
                     $user_model->addUser($user["USER_NAME"], $user["PASSWORD"],
                         $user["FIRST_NAME"], $user["LAST_NAME"],
-                        $user["EMAIL"], $user["STATUS"],
-                        $user["ZKP_PASSWORD"]);
+                        $user["EMAIL"], $user["STATUS"]);
                 }
                 $user = [];
                 $user['USER_ID'] = C\ROOT_ID;
                 $user['PASSWORD'] = $v20check;
-                $user["ZKP_PASSWORD"] = $zkp_password;
                 $user_model->updateUser($user);
                 $db->execute("DELETE FROM VERSION WHERE ID < 19");
                 $db->execute("UPDATE VERSION SET ID=20 WHERE ID=19");
@@ -586,7 +575,8 @@ function upgradeDatabaseVersion20(&$db)
             <link rel="stylesheet" type="text/css"
                  href="<?= C\BASE_URL ?>/css/search.css" />
             </head>
-            <body class="html-ltr <?php if ($_SERVER["MOBILE"]) {e('mobile'); } ?>" >
+            <body class="html-ltr <?php if ($_SERVER["MOBILE"]) {e('mobile'); }
+            ?>" >
             <div id="message" ></div>
             <div class='small-margin-current-activity'>
             <h1 class='center green'>Yioop Upgrade Detected!</h1>
@@ -1635,13 +1625,12 @@ function upgradeDatabaseVersion57(&$db)
             HASH VARCHAR(" . C\LONG_NAME_LEN . "),
             CREATION_TIME VARCHAR(" . C\MICROSECOND_TIMESTAMP_LEN .
             "), UPS INTEGER DEFAULT 0,
-            DOWNS INTEGER DEFAULT 0, ZKP_PASSWORD CHAR(" .
-            C\ZKP_PASSWORD_LEN . "))");
+            DOWNS INTEGER DEFAULT 0)");
         $db->execute("INSERT INTO USERS (USER_ID, FIRST_NAME, LAST_NAME,
             USER_NAME, EMAIL, PASSWORD, STATUS, HASH, CREATION_TIME, UPS,
-            DOWNS, ZKP_PASSWORD)
+            DOWNS)
             SELECT USER_ID, FIRST_NAME, LAST_NAME, USER_NAME, EMAIL, PASSWORD,
-            STATUS, HASH, CREATION_TIME, UPS, DOWNS, ZKP_PASSWORD
+            STATUS, HASH, CREATION_TIME, UPS, DOWNS
             FROM USERS_OLD");
     } else {
         // only one of these should do anything
@@ -1779,7 +1768,7 @@ function upgradeDatabaseVersion62(&$db)
         )");
 }
 /**
- * Upgrades a Version 64 version of the Yioop database to a Version 63 version
+ * Upgrades a Version 63 version of the Yioop database to a Version 64 version
  * @param object $db datasource to use to upgrade.
  */
 function upgradeDatabaseVersion64(&$db)
@@ -1790,7 +1779,7 @@ function upgradeDatabaseVersion64(&$db)
         FUZZY_NUM_VIEWS INTEGER DEFAULT -1)");
 }
 /**
- * Upgrades a Version 65 version of the Yioop database to a Version 64 version
+ * Upgrades a Version 64 version of the Yioop database to a Version 65 version
  * @param object $db datasource to use to upgrade.
  */
 function upgradeDatabaseVersion65(&$db)
@@ -1831,7 +1820,7 @@ EOD;
     }
 }
 /**
- * Upgrades a Version 66 version of the Yioop database to a Version 65 version
+ * Upgrades a Version 65 version of the Yioop database to a Version 66 version
  * @param object $db datasource to use to upgrade.
  */
 function upgradeDatabaseVersion66(&$db)
@@ -1840,7 +1829,7 @@ function upgradeDatabaseVersion66(&$db)
         C\TITLE_LEN . ") DEFAULT ''");
 }
 /**
- * Upgrades a Version 67 version of the Yioop database to a Version 66 version
+ * Upgrades a Version 66 version of the Yioop database to a Version 67 version
  * @param object $db datasource to use to upgrade.
  */
 function upgradeDatabaseVersion67(&$db)
@@ -1851,7 +1840,7 @@ function upgradeDatabaseVersion67(&$db)
         "DEFAULT_QUERY VARCHAR(" . C\TITLE_LEN . ") DEFAULT ''");
 }
 /**
- * Upgrades a Version 68 version of the Yioop database to a Version 67 version
+ * Upgrades a Version 67 version of the Yioop database to a Version 68 version
  * @param object $db datasource to use to upgrade.
  */
 function upgradeDatabaseVersion68(&$db)
@@ -1868,3 +1857,29 @@ function upgradeDatabaseVersion68(&$db)
         $db->unlinkRecursive(C\WORK_DIRECTORY . "/feeds");
     }
 }
+
+/**
+ * Upgrades a Version 68 version of the Yioop database to a Version 69 version
+ * @param object $db datasource to use to upgrade.
+ */
+function upgradeDatabaseVersion69(&$db)
+{
+    $dbinfo = ["DBMS" => C\DBMS, "DB_HOST" => C\DB_HOST,
+        "DB_NAME" => C\DB_NAME, "DB_PASSWORD" => C\DB_PASSWORD];
+    $auto_increment = $db->autoIncrement($dbinfo);
+    $serial = $db->serialType($dbinfo);
+    $db->execute("ALTER TABLE USERS RENAME TO USERS_OLD");
+    $db->execute("CREATE TABLE USERS(USER_ID $serial PRIMARY KEY
+        $auto_increment, FIRST_NAME VARCHAR(" . C\NAME_LEN."),
+        LAST_NAME VARCHAR(" . C\NAME_LEN . "), USER_NAME VARCHAR(" .
+        C\NAME_LEN .") UNIQUE, EMAIL VARCHAR(" . C\LONG_NAME_LEN . "),
+        PASSWORD VARCHAR(" . C\LONG_NAME_LEN . "), STATUS INTEGER,
+        HASH VARCHAR(" . C\LONG_NAME_LEN . "),
+        CREATION_TIME VARCHAR(" . C\MICROSECOND_TIMESTAMP_LEN .
+        "), UPS INTEGER DEFAULT 0, DOWNS INTEGER DEFAULT 0)");
+    $db->execute("INSERT INTO USERS (USER_ID, FIRST_NAME, LAST_NAME,
+        USER_NAME, EMAIL, PASSWORD, STATUS, HASH, CREATION_TIME, UPS, DOWNS)
+        SELECT USER_ID, FIRST_NAME, LAST_NAME, USER_NAME, EMAIL, PASSWORD,
+            STATUS, HASH, CREATION_TIME, UPS, DOWNS
+        FROM USERS_OLD");
+}
diff --git a/src/locale/ar/configure.ini b/src/locale/ar/configure.ini
index 86b47b675..d67aac048 100755
--- a/src/locale/ar/configure.ini
+++ b/src/locale/ar/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "ملفات تعريف الارتباط الحاجة إلى تسجيل الدخول!!"
 admin_controller_account_not_active = "حساب غير نشط. ربما طلب إعادة تعيين كلمة المرور?"
 admin_controller_login_successful = "تسجيل الدخول الناجحة!!"
-admin_controller_no_back_button = "لا يوجد زر الخلف أثناء تسجيل الدخول!"
 admin_controller_login_failed = "اسم المستخدم أو كلمة المرور غير صحيحة!"
 admin_controller_login_to_config = "تسجيل الدخول لمتابعه التكوين (الافتراضي: u = root ، p =)"
 admin_controller_status_updates_stopped = "توقفت عن تحديثات الحالة."
@@ -613,8 +612,6 @@ system_component_image_captcha = "صورة Captcha"
 system_component_no_recovery = "لا المستخدم كلمة السر الانتعاش الرابط"
 system_component_email_recovery = "البريد الإلكتروني رابط استعادة كلمة المرور"
 system_component_email_questions = "وصلة البريد الإلكتروني والتحقق من الأسئلة الانتعاش"
-system_component_normal_authentication = "عادي المصادقة"
-system_component_zkp_authentication = "ZKP المصادقة"
 system_component_enable = "تمكين"
 system_component_disable = "تعطيل"
 system_component_settings_updated = "إعدادات تحديث!"
@@ -772,8 +769,6 @@ register_view_return = "العودة إلى Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "تسجيل الدخول"
-signin_view_signing_in = "تسجيل الدخول"
-signin_view_login_failed = "فشل تسجيل الدخول!"
 signin_view_username = "اسم المستخدم"
 signin_view_password = "كلمة المرور"
 signin_view_login = "تسجيل الدخول"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "الاستعلام الافتراضي:"
 searchsources_element_search = "البحث"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "مصادقة, الوصول, الخصوصية, Captcha, و الانتعاش"
-security_element_auth_and_access = "المصادقة الوصول"
-security_element_authentication_type = "نوع المصادقة:"
-security_element_zero_unavailable = "صفر المعرفة المصادقة يحتاج بينسل أو قبل الميلاد الرياضيات!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "التوقيت:"
 security_element_token_name = "رمزية اسم:"
 security_element_session_name = "اسم الدورة:"
diff --git a/src/locale/bn/configure.ini b/src/locale/bn/configure.ini
index 4cd9b5d68..fbbd86d7d 100755
--- a/src/locale/bn/configure.ini
+++ b/src/locale/bn/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "কুকিজ প্রয়োজন লগইন করতে!!"
 admin_controller_account_not_active = "অ্যাকাউন্ট সক্রিয় না. হয়তো অনুরোধ পাসওয়ার্ড রিসেট?"
 admin_controller_login_successful = "লগইন সফল!!"
-admin_controller_no_back_button = "কোন ব্যাক বোতাম সময় প্রবেশ করুন!"
 admin_controller_login_failed = "ব্যবহারকারীর নাম বা পাসওয়ার্ড ভুল!"
 admin_controller_login_to_config = "লগইন অব্যাহত রাখার জন্য কনফিগারেশন (ডিফল্ট: u=root p=)"
 admin_controller_status_updates_stopped = "স্ট্যাটাস আপডেট বন্ধ আছে."
@@ -613,8 +612,6 @@ system_component_image_captcha = "ইমেজ ক্যাপচা"
 system_component_no_recovery = "কোন ব্যবহারকারী পাসওয়ার্ড পুনরুদ্ধার লিঙ্ক"
 system_component_email_recovery = "ইমেইল লিঙ্ক পাসওয়ার্ড পুনরুদ্ধার"
 system_component_email_questions = "ইমেইল লিঙ্ক এবং পরীক্ষা প্রশ্ন পুনরুদ্ধারের"
-system_component_normal_authentication = "স্বাভাবিক প্রমাণীকরণ"
-system_component_zkp_authentication = "ZKP প্রমাণীকরণ"
 system_component_enable = "সক্রিয়"
 system_component_disable = "নিষ্ক্রিয়"
 system_component_settings_updated = "সেটিংস আপডেট করা হয়েছে!"
@@ -772,8 +769,6 @@ register_view_return = "ফিরে Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "সাইন ইন"
-signin_view_signing_in = "লগিং"
-signin_view_login_failed = "লগইন ব্যর্থ হয়েছে!"
 signin_view_username = "ব্যবহারকারীর নাম"
 signin_view_password = "পাসওয়ার্ড"
 signin_view_login = "লগইন"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "ডিফল্ট ক্যোয়া
 searchsources_element_search = "অনুসন্ধান"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "প্রমাণীকরণ, অ্যাক্সেস, গোপনীয়তা, ক্যাপচা, এবং পুনরুদ্ধারের"
-security_element_auth_and_access = "প্রমাণীকরণ এবং এক্সেস"
-security_element_authentication_type = "প্রমাণীকরণ টাইপ:"
-security_element_zero_unavailable = "শূন্য জ্ঞান প্রমাণীকরণ প্রয়োজন দ্বারা OpenSSL বা বিসি গণিত!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "সময় অঞ্চল:"
 security_element_token_name = "টোকেন নাম:"
 security_element_session_name = "অধিবেশন নাম:"
diff --git a/src/locale/de/configure.ini b/src/locale/de/configure.ini
index 5a452807f..aaa4f9324 100755
--- a/src/locale/de/configure.ini
+++ b/src/locale/de/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Cookies n&ouml;tig, um login!!"
 admin_controller_account_not_active = "Konto nicht aktiv ist. Vielleicht Kennwortzur&uuml;cksetzung anfordern?"
 admin_controller_login_successful = "Login Erfolgreich!!"
-admin_controller_no_back_button = "Keine Zur&uuml;ck-Taste Bei Der Anmeldung!"
 admin_controller_login_failed = "Benutzername oder Passwort Falsch!"
 admin_controller_login_to_config = "Einloggen, um die Konfiguration fortzusetzen (default: u=root, p=)"
 admin_controller_status_updates_stopped = "Status-updates aufgeh&ouml;rt haben."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Bild Captcha"
 system_component_no_recovery = "Kein Benutzer-Passwort-Recovery-Link"
 system_component_email_recovery = "E-Mail-Link Password Recovery"
 system_component_email_questions = "E-Mail-Link und &Uuml;berpr&uuml;fen Fragen Erholung"
-system_component_normal_authentication = "Die Normale Authentifizierung"
-system_component_zkp_authentication = "ZKP-Authentifizierung"
 system_component_enable = "Aktivieren"
 system_component_disable = "Deaktivieren"
 system_component_settings_updated = "Einstellungen Aktualisiert!"
@@ -772,8 +769,6 @@ register_view_return = "Zur&uuml;ck zu Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Signin"
-signin_view_signing_in = "Anmeldung"
-signin_view_login_failed = "Login Fehlgeschlagen!"
 signin_view_username = "Benutzername"
 signin_view_password = "Passwort"
 signin_view_login = "Login"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Standard-Abfrage -:"
 searchsources_element_search = "Suche"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, Zugriff, Datenschutz, Captcha und Erholung"
-security_element_auth_and_access = "Authentifizierung und Zugriff"
-security_element_authentication_type = "Authentifizierungstyp:"
-security_element_zero_unavailable = "Zero-Knowledge-Authentifizierung Muss OpenSSL oder BC Math!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Timezone:"
 security_element_token_name = "Token-Name:"
 security_element_session_name = "Session Name:"
diff --git a/src/locale/en_US/configure.ini b/src/locale/en_US/configure.ini
index 6cb03369f..024510253 100644
--- a/src/locale/en_US/configure.ini
+++ b/src/locale/en_US/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Cookies needed to login!!"
 admin_controller_account_not_active = "Account not active. Maybe request password reset?"
 admin_controller_login_successful = "Login Successful!!"
-admin_controller_no_back_button = "No Back Button During Login!"
 admin_controller_login_failed = "Username or Password Incorrect!"
 admin_controller_login_to_config = "Login to continue configuration (default: u=root, p=)"
 admin_controller_status_updates_stopped = "Status updates have stopped."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Image Captcha"
 system_component_no_recovery = "No User Password Recovery Link"
 system_component_email_recovery = "Email Link Password Recovery"
 system_component_email_questions = "Email Link and Check Questions Recovery"
-system_component_normal_authentication = "Normal Authentication"
-system_component_zkp_authentication = "ZKP Authentication"
 system_component_enable = "Enable"
 system_component_disable = "Disable"
 system_component_settings_updated = "Settings Updated!"
@@ -772,8 +769,6 @@ register_view_return = "Return to Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Signin"
-signin_view_signing_in = "Logging on"
-signin_view_login_failed = "Login Failed!"
 signin_view_username = "Username"
 signin_view_password = "Password"
 signin_view_login = "Login"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Default Query:"
 searchsources_element_search = "Search"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, Access, Privacy, Captcha, and Recovery"
-security_element_auth_and_access = "Authentication and Access"
-security_element_authentication_type = "Authentication Type:"
-security_element_zero_unavailable = "Zero Knowledge Authentication Needs OpenSSL or BC Math!"
+security_element_session_captcha = "Session, Privacy, Captcha, and Recovery"
+security_element_session = "Session"
 security_element_site_timezone = "Timezone:"
 security_element_token_name = "Token Name:"
 security_element_session_name = "Session Name:"
diff --git a/src/locale/es/configure.ini b/src/locale/es/configure.ini
index 0351c6c9e..628fd8c40 100755
--- a/src/locale/es/configure.ini
+++ b/src/locale/es/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Las Cookies necesarias para el inicio de sesi&oacute;n!!"
 admin_controller_account_not_active = "La cuenta no est&aacute; activa. Tal vez la solicitud de restablecimiento de contrase&ntilde;a?"
 admin_controller_login_successful = "Inicio de sesi&oacute;n con &eacute;xito."
-admin_controller_no_back_button = "No Hay Bot&oacute;n Atr&aacute;s Durante El Inicio De Sesi&oacute;n!"
 admin_controller_login_failed = "El nombre de usuario o la contrase&ntilde;a introducidos no son correctos."
 admin_controller_login_to_config = "Inicia sesi&oacute;n para continuar con la configuraci&oacute;n (default: u=root, p=)"
 admin_controller_status_updates_stopped = "Las actualizaciones se han detenido."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Imagen Captcha"
 system_component_no_recovery = "No Hay Enlace De Recuperaci&oacute;n De Contrase&ntilde;a De Usuario"
 system_component_email_recovery = "Enlace De Correo Electr&oacute;nico De Recuperaci&oacute;n De Contrase&ntilde;a"
 system_component_email_questions = "Enlace de correo electr&oacute;nico y Comprobar Preguntas de Recuperaci&oacute;n"
-system_component_normal_authentication = "La Autenticaci&oacute;n Normal"
-system_component_zkp_authentication = "ZKP de Autenticaci&oacute;n"
 system_component_enable = "Habilitar"
 system_component_disable = "Deshabilitar"
 system_component_settings_updated = "Configuraci&oacute;n Actualizado!"
@@ -772,8 +769,6 @@ register_view_return = "Volver a Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Signin"
-signin_view_signing_in = "El registro en"
-signin_view_login_failed = "Error De Inicio De Sesi&oacute;n!"
 signin_view_username = "Nombre de usuario"
 signin_view_password = "Contrase&ntilde;a"
 signin_view_login = "Inicio de sesi&oacute;n"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Consulta Predeterminada:"
 searchsources_element_search = "B&uacute;squeda"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, el Acceso, la Privacidad, Captcha, y la Recuperaci&oacute;n"
-security_element_auth_and_access = "La autenticaci&oacute;n y el Acceso"
-security_element_authentication_type = "Tipo De Autenticaci&oacute;n:"
-security_element_zero_unavailable = "Cero Conocimiento de Autenticaci&oacute;n Necesidades de OpenSSL o BC Matem&aacute;ticas!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "La zona horaria:"
 security_element_token_name = "Token De Nombre De:"
 security_element_session_name = "Nombre De La Sesi&oacute;n:"
diff --git a/src/locale/fa/configure.ini b/src/locale/fa/configure.ini
index 10728d1eb..3ecb208a0 100755
--- a/src/locale/fa/configure.ini
+++ b/src/locale/fa/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "کوکی های مورد نیاز برای ورود به سایت!!"
 admin_controller_account_not_active = "حساب کاربری فعال نیست. شاید درخواست تنظیم مجدد رمز عبور?"
 admin_controller_login_successful = "با موفقیت وارد شدید!!"
-admin_controller_no_back_button = "هیچ دکمه بازگشت در ورود!"
 admin_controller_login_failed = "نام کاربری یا رمز عبور اشتباه است!"
 admin_controller_login_to_config = "برای ادامهٔ تنظیمات وارد شوید (پیش&zwnj;فرض: نام کاربری=root و رمز عبور=)"
 admin_controller_status_updates_stopped = "به روز رسانی وضعیت متوقف شده است."
@@ -613,8 +612,6 @@ system_component_image_captcha = "تصویر کد امنیتی"
 system_component_no_recovery = "هیچ کاربری بازیابی رمز عبور لینک"
 system_component_email_recovery = "لینک ایمیل بازیابی رمز عبور"
 system_component_email_questions = "لینک ایمیل و بررسی سوالات بازیابی"
-system_component_normal_authentication = "احراز هویت طبیعی"
-system_component_zkp_authentication = "ZKP احراز هویت"
 system_component_enable = "فعال"
 system_component_disable = "غیر فعال کردن"
 system_component_settings_updated = "تنظیمات به روز شده!"
@@ -772,8 +769,6 @@ register_view_return = "بازگشت به Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "ورود"
-signin_view_signing_in = "ورود"
-signin_view_login_failed = "ورود ناموفق!"
 signin_view_username = "نام کاربری"
 signin_view_password = "رمز عبور"
 signin_view_login = "ورود"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "به طور پیش فرض پرس و جو:"
 searchsources_element_search = "جستجو"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "تایید دسترسی به حریم امنیتی و بازیابی"
-security_element_auth_and_access = "احراز هویت و دسترسی"
-security_element_authentication_type = "احراز هویت نوع:"
-security_element_zero_unavailable = "دانش صفر احراز هویت نیاز OpenSSL و یا BC ریاضی!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "منطقه زمانی:"
 security_element_token_name = "رمز نام:"
 security_element_session_name = "جلسه نام و نام خانوادگی:"
diff --git a/src/locale/fr_FR/configure.ini b/src/locale/fr_FR/configure.ini
index 91fa49ec9..480ebf950 100755
--- a/src/locale/fr_FR/configure.ini
+++ b/src/locale/fr_FR/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Les cookies n&eacute;cessaires &agrave; la connexion!!"
 admin_controller_account_not_active = "Le compte n&#039;est pas actif. Peut-&ecirc;tre que la demande de r&eacute;initialisation de mot de passe?"
 admin_controller_login_successful = "D&eacute;connexion r&eacute;ussie!"
-admin_controller_no_back_button = "Pas de bouton de retour lors de la connexion!"
 admin_controller_login_failed = "Nom d&#039;utilisateur ou mot de passe incorrect!"
 admin_controller_login_to_config = "Connexion pour continuer la configuration (par d&eacute;faut: u=root, p=)"
 admin_controller_status_updates_stopped = "Mises &agrave; jour de statut ont arr&ecirc;t&eacute;."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Image captcha"
 system_component_no_recovery = "Pas de lien de r&eacute;cup&eacute;ration de mot de passe utilisateur"
 system_component_email_recovery = "Email lien de r&eacute;cup&eacute;ration de mot de passe"
 system_component_email_questions = "Lien e-mail et v&eacute;rifiez les questions de r&eacute;cup&eacute;ration"
-system_component_normal_authentication = "L&#039;authentification normale"
-system_component_zkp_authentication = "ZKP authentification"
 system_component_enable = "Activer"
 system_component_disable = "D&eacute;sactiver"
 system_component_settings_updated = "Les param&egrave;tres de mise &agrave; jour!"
@@ -772,8 +769,6 @@ register_view_return = "Retour"
 ;
 ; SigninView.php
 signin_view_signin = "Connexion"
-signin_view_signing_in = "L&#039;enregistrement sur"
-signin_view_login_failed = "&Eacute;chec de la connexion!"
 signin_view_username = "Utilisateur"
 signin_view_password = "Mot de passe"
 signin_view_login = "Se connecter"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Requ&ecirc;te par d&eacute;faut:"
 searchsources_element_search = "Recherche"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, l&#039;acc&egrave;s, la confidentialit&eacute;, captcha, et la r&eacute;cup&eacute;ration"
-security_element_auth_and_access = "D&#039;Acc&egrave;s et d&#039;authentification"
-security_element_authentication_type = "Type d&#039;authentification:"
-security_element_zero_unavailable = "Nulle connaissance de l&#039;authentification besoins OpenSSL ou BC Maths!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Fuseau horaire:"
 security_element_token_name = "Nom du jeton:"
 security_element_session_name = "Nom de la session:"
diff --git a/src/locale/he/configure.ini b/src/locale/he/configure.ini
index 612e211ce..72149a363 100755
--- a/src/locale/he/configure.ini
+++ b/src/locale/he/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "עוגיות צריך להתחבר!!"
 admin_controller_account_not_active = "חשבון לא פעיל. אולי בקשה לאיפוס סיסמה?"
 admin_controller_login_successful = "התחברות מוצלחת!!"
-admin_controller_no_back_button = "אין כפתור חזרה במהלך כניסה!"
 admin_controller_login_failed = "סיסמא / שם משתמש אינו נכון"
 admin_controller_login_to_config = "התחברות כדי להמשיך בקביעת התצורה (ברירת מחדל: u = root, p =)"
 admin_controller_status_updates_stopped = "עדכוני סטטוס פסקו."
@@ -613,8 +612,6 @@ system_component_image_captcha = "תמונת Captcha"
 system_component_no_recovery = "לא משתמש שחזור סיסמה הקישור"
 system_component_email_recovery = "דואר אלקטרוני קישור לשחזור הסיסמה"
 system_component_email_questions = "דואר אלקטרוני קישור ולבדוק שאלות התאוששות"
-system_component_normal_authentication = "אימות זהות רגילים"
-system_component_zkp_authentication = "ZKP אימות"
 system_component_enable = "לאפשר"
 system_component_disable = "השבת"
 system_component_settings_updated = "הגדרות מעודכנות!"
@@ -772,8 +769,6 @@ register_view_return = "לחזור Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Signin"
-signin_view_signing_in = "כניסה"
-signin_view_login_failed = "כניסה נכשלה!"
 signin_view_username = "שם משתמש"
 signin_view_password = "סיסמא"
 signin_view_login = "כניסה"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "ברירת המחדל של השאילתה:
 searchsources_element_search = "חיפוש"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, גישה, פרטיות, Captcha, ושחזור"
-security_element_auth_and_access = "אימות וגישה"
-security_element_authentication_type = "סוג אימות:"
-security_element_zero_unavailable = "אפס ידע אימות צריך OpenSSL או לפנה &quot; ס מתמטיקה!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "אזור זמן:"
 security_element_token_name = "אסימון שם:"
 security_element_session_name = "שם ההפעלה:"
diff --git a/src/locale/hi/configure.ini b/src/locale/hi/configure.ini
index 2ba253702..89cf82e25 100755
--- a/src/locale/hi/configure.ini
+++ b/src/locale/hi/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "कुकीज़ की जरूरत के लिए लॉग इन!!"
 admin_controller_account_not_active = "खाता सक्रिय नहीं है. शायद अनुरोध पासवर्ड रीसेट?"
 admin_controller_login_successful = "लॉग इन सफल"
-admin_controller_no_back_button = "कोई वापस बटन के दौरान प्रवेश के साथ!"
 admin_controller_login_failed = "लॉग इन असफल"
 admin_controller_login_to_config = "विन्यास जारी रखने के लिए लॉगिन (डिफ़ॉल्ट: उपयोगकर्ता नाम = root, पासवर्ड =)"
 admin_controller_status_updates_stopped = "स्थिति अद्यतन बंद कर दिया है."
@@ -613,8 +612,6 @@ system_component_image_captcha = "छवि कैप्चा"
 system_component_no_recovery = "कोई उपयोगकर्ता पासवर्ड वसूली लिंक"
 system_component_email_recovery = "ईमेल लिंक पासवर्ड वसूली"
 system_component_email_questions = "ईमेल लिंक की जाँच करें और सवाल वसूली"
-system_component_normal_authentication = "सामान्य प्रमाणीकरण"
-system_component_zkp_authentication = "ZKP प्रमाणीकरण"
 system_component_enable = "सक्षम करें"
 system_component_disable = "अक्षम"
 system_component_settings_updated = "सेटिंग्स अद्यतन!"
@@ -772,8 +769,6 @@ register_view_return = "वापसी के लिए Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "साइन इन"
-signin_view_signing_in = "प्रवेश करने पर"
-signin_view_login_failed = "लॉग इन विफल रहा!"
 signin_view_username = "उपयोगकर्ता का नाम"
 signin_view_password = "पासवर्ड"
 signin_view_login = "लॉग इन करें"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "डिफ़ॉल्ट क्वेर
 searchsources_element_search = "खोज"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, उपयोग, गोपनीयता, कैप्चा, और वसूली"
-security_element_auth_and_access = "प्रमाणीकरण और पहुँच"
-security_element_authentication_type = "प्रमाणीकरण के प्रकार:"
-security_element_zero_unavailable = "शून्य ज्ञान के प्रमाणीकरण की जरूरत ओपनएसएसएल या ई. पू गणित!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "समय क्षेत्र:"
 security_element_token_name = "टोकन का नाम:"
 security_element_session_name = "सत्र का नाम:"
diff --git a/src/locale/id/configure.ini b/src/locale/id/configure.ini
index 453cc7324..fb95a83ea 100755
--- a/src/locale/id/configure.ini
+++ b/src/locale/id/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Cookies yang diperlukan untuk login!!"
 admin_controller_account_not_active = "Akun tidak aktif. Mungkin permintaan reset password?"
 admin_controller_login_successful = "Login berhasil"
-admin_controller_no_back_button = "Tidak Ada Tombol Kembali Pada Saat Login!"
 admin_controller_login_failed = "Login tidak berhasil"
 admin_controller_login_to_config = "Login untuk melanjutkan konfigurasi (default: username = root, password =)"
 admin_controller_status_updates_stopped = "Update Status telah berhenti."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Gambar Captcha"
 system_component_no_recovery = "Tidak Ada User Password Recovery Link"
 system_component_email_recovery = "Link Email Password Recovery"
 system_component_email_questions = "Link Email dan Memeriksa Pertanyaan Pemulihan"
-system_component_normal_authentication = "Otentikasi Normal"
-system_component_zkp_authentication = "ZKP Otentikasi"
 system_component_enable = "Mengaktifkan"
 system_component_disable = "Menonaktifkan"
 system_component_settings_updated = "Pengaturan Diperbarui!"
@@ -772,8 +769,6 @@ register_view_return = "Kembali ke Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Signin"
-signin_view_signing_in = "Log on"
-signin_view_login_failed = "Login Gagal!"
 signin_view_username = "Username"
 signin_view_password = "Kata sandi"
 signin_view_login = "Login"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Default Query:"
 searchsources_element_search = "Pencarian"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, Akses, Privasi, Captcha, dan Pemulihan"
-security_element_auth_and_access = "Otentikasi dan Akses"
-security_element_authentication_type = "Jenis Otentikasi:"
-security_element_zero_unavailable = "Nol Pengetahuan Otentikasi Kebutuhan OpenSSL atau BC Matematika!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Timezone:"
 security_element_token_name = "Token Nama:"
 security_element_session_name = "Nama Sesi:"
diff --git a/src/locale/it/configure.ini b/src/locale/it/configure.ini
index 4bfdaaec3..dc38a6327 100755
--- a/src/locale/it/configure.ini
+++ b/src/locale/it/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "I Cookies necessari per effettuare il login!!"
 admin_controller_account_not_active = "Account non &egrave; attivo. Forse la richiesta di reimpostazione della password?"
 admin_controller_login_successful = "Accesso effettuato!!"
-admin_controller_no_back_button = "Nessun Pulsante Indietro Durante Il Login!"
 admin_controller_login_failed = "Utente o Password non corretto!"
 admin_controller_login_to_config = "Accedi per continuare la configurazione (utente=root; nessuna password)"
 admin_controller_status_updates_stopped = "Aggiornamenti stato interrotti."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Immagine Captcha"
 system_component_no_recovery = "Nessun Utente Password Recovery Link"
 system_component_email_recovery = "Link Dell&#039;E-Mail Di Recupero Password"
 system_component_email_questions = "E-mail Link e Controllare le Domande di Recupero"
-system_component_normal_authentication = "L&#039;Autenticazione Normale"
-system_component_zkp_authentication = "ZKP di Autenticazione"
 system_component_enable = "Attivare"
 system_component_disable = "Disattivare"
 system_component_settings_updated = "Aggiornate Le Impostazioni!"
@@ -772,8 +769,6 @@ register_view_return = "Ritorno a Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Accedi"
-signin_view_signing_in = "La registrazione"
-signin_view_login_failed = "Accesso Non Riuscito!"
 signin_view_username = "Utente"
 signin_view_password = "Password"
 signin_view_login = "Accedi"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Query Predefinita:"
 searchsources_element_search = "Ricerca"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, Accesso, Privacy, Captcha, e il Recupero"
-security_element_auth_and_access = "Di autenticazione e di Accesso"
-security_element_authentication_type = "Tipo Di Autenticazione:"
-security_element_zero_unavailable = "Zero Conoscenza di Autenticazione ha Bisogno di OpenSSL o BC Matematica!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Fuso orario:"
 security_element_token_name = "Nome Del Token:"
 security_element_session_name = "Nome Di Sessione:"
diff --git a/src/locale/ja/configure.ini b/src/locale/ja/configure.ini
index f55f1412b..e9ff3bd32 100755
--- a/src/locale/ja/configure.ini
+++ b/src/locale/ja/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "クッキーに必要なログイン!!"
 admin_controller_account_not_active = "口座います。 その要求にパスワードをリセット?"
 admin_controller_login_successful = "ログイン成功"
-admin_controller_no_back_button = "ていない時のボタンのログイン!"
 admin_controller_login_failed = "無効なユーザー名またはパスワード"
 admin_controller_login_to_config = "ログインして設定を続行します (デフォルト: ユーザー名=root、パスワード=)"
 admin_controller_status_updates_stopped = "状況を更新して停止します。"
@@ -613,8 +612,6 @@ system_component_image_captcha = "画像酔"
 system_component_no_recovery = "ないユーザーのパスワード回復のリンク"
 system_component_email_recovery = "メールのリンクはパスワード回復"
 system_component_email_questions = "メールのリンクにチェックの質問の回復"
-system_component_normal_authentication = "通常の認証"
-system_component_zkp_authentication = "ZKP認証"
 system_component_enable = "能"
 system_component_disable = "無効化"
 system_component_settings_updated = "設定の商品が紹介されました。"
@@ -772,8 +769,6 @@ register_view_return = "戻Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "サインイン"
-signin_view_signing_in = "ログイン"
-signin_view_login_failed = "ログインに失敗した!"
 signin_view_username = "ユーザー名"
 signin_view_password = "パスワード"
 signin_view_login = "ログイン"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "デフォルト:クエリを"
 searchsources_element_search = "検索"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth、アクセス、プライバシー&quot;と、回復"
-security_element_auth_and_access = "認証およびアクセス"
-security_element_authentication_type = "認証タイプ："
-security_element_zero_unavailable = "ゼロ知識証のニーズOpenSSLやBC数学!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "タイムゾーン:"
 security_element_token_name = "トークン名："
 security_element_session_name = "セッション名："
diff --git a/src/locale/kn/configure.ini b/src/locale/kn/configure.ini
index a61222c17..f44705ead 100755
--- a/src/locale/kn/configure.ini
+++ b/src/locale/kn/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "ಕುಕೀಸ್ ಅಗತ್ಯವಿದೆ ಲಾಗಿನ್!!"
 admin_controller_account_not_active = "ಖಾತೆ ಸಕ್ರಿಯವಾಗಿಲ್ಲ. ಬಹುಶಃ ವಿನಂತಿ ಪಾಸ್ವರ್ಡ್ ರೀಸೆಟ್?"
 admin_controller_login_successful = "ಒಳಪ್ರವೇಶಣೆ ಸಫಲ"
-admin_controller_no_back_button = "ಯಾವುದೇ ಬ್ಯಾಕ್ ಬಟನ್ ಸಮಯದಲ್ಲಿ ಲಾಗಿನ್!"
 admin_controller_login_failed = "ಒಳಪ್ರವೇಶಣೆ ವಿಫಲ, ಬಳಕೆದಾರನ ಹೆಸರು ಅಥವಾ ಪ್ರವೇಶ ಪದ ತಪ್ಪಾಗಿದೆ "
 admin_controller_login_to_config = "ಲಾಗಿನ್ ಮುಂದುವರಿಸಲು ಸಂರಚನಾ (ಡೀಫಾಲ್ಟ್: ಬಳಕೆದಾರಹೆಸರು=root ,      ಪಾಸ್ವರ್ಡ್=)"
 admin_controller_status_updates_stopped = "ಸ್ಥಿತಿ ನವೀಕರಣಗಳನ್ನು ನಿಲ್ಲಿಸಿದವು."
@@ -613,8 +612,6 @@ system_component_image_captcha = "ಚಿತ್ರ ಕ್ಯಾಪ್ಚಾ"
 system_component_no_recovery = "ಯಾವುದೇ ಬಳಕೆದಾರ ಪಾಸ್ವರ್ಡ್ ಚೇತರಿಕೆ ಲಿಂಕ್"
 system_component_email_recovery = "ಇಮೇಲ್ ಲಿಂಕ್ ಪಾಸ್ವರ್ಡ್ ರಿಕವರಿ"
 system_component_email_questions = "ಇಮೇಲ್ ಲಿಂಕ್ ಪರಿಶೀಲಿಸಿ ಮತ್ತು ಪ್ರಶ್ನೆಗಳನ್ನು ಚೇತರಿಕೆ"
-system_component_normal_authentication = "ಸಾಮಾನ್ಯ ದೃಢೀಕರಣ"
-system_component_zkp_authentication = "ZKP ದೃಢೀಕರಣ"
 system_component_enable = "ಸಕ್ರಿಯಗೊಳಿಸಿ"
 system_component_disable = "ನಿಷ್ಕ್ರಿಯಗೊಳಿಸಿ"
 system_component_settings_updated = "ಸೆಟ್ಟಿಂಗ್ಗಳನ್ನು ಅಪ್ಡೇಟ್ಗೊಳಿಸಲಾಗಿದೆ!"
@@ -772,8 +769,6 @@ register_view_return = "ಮರಳಲು Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "ಒಳಪ್ರವೇಶಿಸಿ"
-signin_view_signing_in = "ಮೇಲೆ ಲಾಗಿಂಗ್"
-signin_view_login_failed = "ಲಾಗಿನ್ ವಿಫಲವಾಗಿದೆ!"
 signin_view_username = "ಬಳಕೆದಾರನ ಹೆಸರು"
 signin_view_password = "ಪ್ರವೇಶ ಪದ"
 signin_view_login = "ಒಳಪ್ರವೇಶಿಸಿ"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "ಡೀಫಾಲ್ಟ್ ಪ್ರಶ್
 searchsources_element_search = "ಹುಡುಕಾಟ"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "ದೃಢೀಕರಣ, ಪ್ರವೇಶ, ಗೌಪ್ಯತೆ, ಕ್ಯಾಪ್ಚಾ, ಮತ್ತು ಚೇತರಿಕೆ"
-security_element_auth_and_access = "ದೃಢೀಕರಣ ಮತ್ತು ಪ್ರವೇಶ"
-security_element_authentication_type = "Authentication Type:"
-security_element_zero_unavailable = "ಶೂನ್ಯ ಜ್ಞಾನ ದೃಢೀಕರಣ ಅಗತ್ಯವಿದೆ OpenSSL ಅಥವಾ ಕ್ರಿ. ಪೂ. ಗಣಿತ!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "ಕಾಲವಲಯ:"
 security_element_token_name = "ಟೋಕನ್ ಹೆಸರು:"
 security_element_session_name = "ಅಧಿವೇಶನ ಹೆಸರು:"
diff --git a/src/locale/ko/configure.ini b/src/locale/ko/configure.ini
index 55f3ce5a6..38a062092 100755
--- a/src/locale/ko/configure.ini
+++ b/src/locale/ko/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "쿠키하는 데 필요한 로그인!!"
 admin_controller_account_not_active = "계정 활성화되지 않습니다. 어쩌면 요청을 암호를 다시 설정?"
 admin_controller_login_successful = "로그인 성공!!!"
-admin_controller_no_back_button = "아무 버튼을 다시 로그인하는 동안!"
 admin_controller_login_failed = "로그인 실패!!!"
 admin_controller_login_to_config = "구성을 계속하려면 로그인(기본값: 사용자 이름=root, 암호=)"
 admin_controller_status_updates_stopped = "상황 업데이트가 중지되었습니다."
@@ -613,8 +612,6 @@ system_component_image_captcha = "이미지 Captcha"
 system_component_no_recovery = "사용자 비밀번호 복구 링크"
 system_component_email_recovery = "이메일 링크에 비밀번호 복구"
 system_component_email_questions = "이메일 링크와 확인 질문이 복구"
-system_component_normal_authentication = "정상적인 인증"
-system_component_zkp_authentication = "ZKP 인증"
 system_component_enable = "사"
 system_component_disable = "사"
 system_component_settings_updated = "설정을 업데이트!"
@@ -772,8 +769,6 @@ register_view_return = "로 돌아 Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "사인인"
-signin_view_signing_in = "에 로그온"
-signin_view_login_failed = "로그인하지 못했습니다!"
 signin_view_username = "아이디"
 signin_view_password = "비밀 번호"
 signin_view_login = "로그인"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "기본 검색:"
 searchsources_element_search = "검색"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "인증,액세스,개인정보보호,보안 문자,그리고 복구"
-security_element_auth_and_access = "인증 및 액세스"
-security_element_authentication_type = "인증 유형:"
-security_element_zero_unavailable = "영식 인증을 요구 OpenSSL 또는 BC 수 있도록 되어 있습니다."
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "간:"
 security_element_token_name = "토큰 이름:"
 security_element_session_name = "세션에 이름:"
diff --git a/src/locale/nl/configure.ini b/src/locale/nl/configure.ini
index 78f5c0250..b4ed4c611 100644
--- a/src/locale/nl/configure.ini
+++ b/src/locale/nl/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Cookies die nodig zijn om in te loggen!!"
 admin_controller_account_not_active = "Account niet actief. Misschien vraag wachtwoord opnieuw in te stellen?"
 admin_controller_login_successful = "Login Succesvolle!!"
-admin_controller_no_back_button = "Geen Back Button Tijdens Inloggen!"
 admin_controller_login_failed = "Gebruikersnaam of wachtwoord onjuist!"
 admin_controller_login_to_config = "Login om door te gaan met de configuratie (standaard: username = root, password =)"
 admin_controller_status_updates_stopped = "Status updates zijn gestopt."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Afbeelding Captcha"
 system_component_no_recovery = "Geen Password Recovery Link"
 system_component_email_recovery = "E-Mail Link Password Recovery"
 system_component_email_questions = "E-mail Link en Check Vragen Herstel"
-system_component_normal_authentication = "Normale Authenticatie"
-system_component_zkp_authentication = "ZKP-Verificatie"
 system_component_enable = "Inschakelen"
 system_component_disable = "Uitschakelen"
 system_component_settings_updated = "Instellingen Bijgewerkt!"
@@ -772,8 +769,6 @@ register_view_return = "Terug naar Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Aanmelden"
-signin_view_signing_in = "Aanmelden"
-signin_view_login_failed = "Login Mislukt!"
 signin_view_username = "gebruikersnaam"
 signin_view_password = "wachtwoord"
 signin_view_login = "Log In"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Standaard Query:"
 searchsources_element_search = "Zoeken"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Authenticatie en Captcha Soorten"
-security_element_auth_and_access = "Verificatie en Toegang"
-security_element_authentication_type = "Verificatietype"
-security_element_zero_unavailable = "BC Math Nnul Kennis Authentication Needs OpenSSL of BC Math!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Tijdzone:"
 security_element_token_name = "Token Naam:"
 security_element_session_name = "Sessie Naam:"
diff --git a/src/locale/pl/configure.ini b/src/locale/pl/configure.ini
index d256c1168..354aac3f6 100755
--- a/src/locale/pl/configure.ini
+++ b/src/locale/pl/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Pliki cookie są niezbędne do wejścia!!"
 admin_controller_account_not_active = "Konto nie jest aktywne. Może poprosić o hasło zresetować?"
 admin_controller_login_successful = "Login Sukces!!"
-admin_controller_no_back_button = "Nie Ma Przycisku Do Tyłu Przy Wejściu!"
 admin_controller_login_failed = "Nazwa użytkownika lub nieprawidłowe hasło!"
 admin_controller_login_to_config = "Zaloguj się, aby kontynuować konfigurację (domyślnie: username = root, Password =)"
 admin_controller_status_updates_stopped = "Aktualizacje statusu ustały."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Obraz Captcha"
 system_component_no_recovery = "Nie Link Do Odzyskiwania Hasła "
 system_component_email_recovery = "E-Mail Link Do Odzyskiwania Hasła "
 system_component_email_questions = "Wyślij łącze pocztą e-mail i skanowanie pytania odzyskiwania"
-system_component_normal_authentication = "Uwierzytelnianie"
-system_component_zkp_authentication = "Uwierzytelnianie ЗУП "
 system_component_enable = "Włączyć"
 system_component_disable = "Wyłączyć"
 system_component_settings_updated = "Ustawienia Zostały Zaktualizowane!"
@@ -772,8 +769,6 @@ register_view_return = "Powr&oacute;t do Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Zalogować się"
-signin_view_signing_in = "Wejście"
-signin_view_login_failed = "Błąd Logowania!"
 signin_view_username = "Nazwa użytkownika"
 signin_view_password = "Hasło"
 signin_view_login = "Login"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Ustawieniem Domyślnym:"
 searchsources_element_search = "Wyszukiwanie"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Autoryzacji, dostępu, prywatności, captcha i odzyskiwania"
-security_element_auth_and_access = "Uwierzytelniania i dostępu do"
-security_element_authentication_type = "Typ Uwierzytelniania:"
-security_element_zero_unavailable = "Uwierzytelniania z zerową znajomością powinien OpenSSL lub p. n. e., matematyka!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Strefa czasowa:"
 security_element_token_name = "Nazwa Token:"
 security_element_session_name = "Nazwa Sesji:"
diff --git a/src/locale/pt/configure.ini b/src/locale/pt/configure.ini
index a5306f7fe..2506ea748 100755
--- a/src/locale/pt/configure.ini
+++ b/src/locale/pt/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Os Cookies necess&aacute;rio para fazer o login!!"
 admin_controller_account_not_active = "Conta de ativo. Talvez o pedido de redefini&ccedil;&atilde;o de senha?"
 admin_controller_login_successful = "In&iacute;cio De Sess&atilde;o Bem-Sucedida!!"
-admin_controller_no_back_button = "Nenhum Bot&atilde;o Voltar Durante O In&iacute;cio De Sess&atilde;o!"
 admin_controller_login_failed = "Nome de usu&aacute;rio ou Senha Incorretos!"
 admin_controller_login_to_config = "Login para continuar a configura&ccedil;&atilde;o (padr&atilde;o: nome de usu&aacute;rio=root ,     senha=)"
 admin_controller_status_updates_stopped = "Atualiza&ccedil;&otilde;es de Status de ter parado."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Imagem Captcha"
 system_component_no_recovery = "Nenhum Utilizador Palavra-Passe De Recupera&ccedil;&atilde;o Link"
 system_component_email_recovery = "Link De E-Mail De Recupera&ccedil;&atilde;o De Senha"
 system_component_email_questions = "Link de e-mail e Verifique Perguntas de Recupera&ccedil;&atilde;o"
-system_component_normal_authentication = "A Autentica&ccedil;&atilde;o Normal"
-system_component_zkp_authentication = "ZKP Autentica&ccedil;&atilde;o"
 system_component_enable = "Activar"
 system_component_disable = "Desativar"
 system_component_settings_updated = "Configura&ccedil;&otilde;es Atualizadas!"
@@ -772,8 +769,6 @@ register_view_return = "Voltar para Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Signin"
-signin_view_signing_in = "O registo em"
-signin_view_login_failed = "Falhou O In&iacute;cio De Sess&atilde;o!"
 signin_view_username = "Nome de usu&aacute;rio"
 signin_view_password = "Palavra-passe"
 signin_view_login = "Login"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Padr&atilde;o De Consulta:"
 searchsources_element_search = "Procura"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, de Acesso, Privacidade, Captcha, e Recupera&ccedil;&atilde;o"
-security_element_auth_and_access = "De Acesso e autentica&ccedil;&atilde;o"
-security_element_authentication_type = "Tipo De Autentica&ccedil;&atilde;o:"
-security_element_zero_unavailable = "Conhecimento Zero de Autentica&ccedil;&atilde;o Necessidades OpenSSL ou BC Matem&aacute;tica!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Fuso hor&aacute;rio:"
 security_element_token_name = "Nome De Token:"
 security_element_session_name = "Nome Da Sess&atilde;o:"
diff --git a/src/locale/ru/configure.ini b/src/locale/ru/configure.ini
index 83da88299..ec9a7be10 100755
--- a/src/locale/ru/configure.ini
+++ b/src/locale/ru/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Файлы cookie необходимы для входа!!"
 admin_controller_account_not_active = "Учетная запись не активна. Может быть, запросить пароль сбросить?"
 admin_controller_login_successful = "Логин Успешным!!"
-admin_controller_no_back_button = "Нет Кнопки Назад При Входе!"
 admin_controller_login_failed = "Имя пользователя или неверный пароль!"
 admin_controller_login_to_config = "Логин для продолжения настройки (по умолчанию: U=root Р=)"
 admin_controller_status_updates_stopped = "Обновления статуса прекратились."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Изображения Капчи"
 system_component_no_recovery = "Нет Ссылка Для Восстановления Пароля "
 system_component_email_recovery = "Электронную Почту Ссылку Для Восстановления Пароля "
 system_component_email_questions = "Отправить ссылку по электронной почте и проверить вопросы восстановления"
-system_component_normal_authentication = "Обычная Проверка Подлинности"
-system_component_zkp_authentication = "Проверка подлинности ЗУП "
 system_component_enable = "Включить"
 system_component_disable = "Отключить"
 system_component_settings_updated = "Настройки Обновлены!"
@@ -772,8 +769,6 @@ register_view_return = "Вернуться к Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Авторизоваться"
-signin_view_signing_in = "Вход"
-signin_view_login_failed = "Ошибка Входа!"
 signin_view_username = "Имя пользователя"
 signin_view_password = "Пароль"
 signin_view_login = "Логин"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Запрос По Умолчанию:"
 searchsources_element_search = "Поиск"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Авторизации, доступа, конфиденциальности, капчу и восстановления"
-security_element_auth_and_access = "Проверки подлинности и доступа к"
-security_element_authentication_type = "Тип Проверки Подлинности:"
-security_element_zero_unavailable = "Аутентификации с нулевым знанием должен OpenSSL или до н. э. математика!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Часовой пояс:"
 security_element_token_name = "Имя Токена:"
 security_element_session_name = "Название Сессии:"
diff --git a/src/locale/te/configure.ini b/src/locale/te/configure.ini
index ed8d363e0..178461dc2 100644
--- a/src/locale/te/configure.ini
+++ b/src/locale/te/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "లాగిన్ అవడానికి కుకీలు అవసరము!!"
 admin_controller_account_not_active = "ఖాతా ఆక్టివ్ గా లేదు. పాస్&zwnj;వర్డ్ రీసెట్ చెయ్యమని అడగవచ్చు "
 admin_controller_login_successful = "లాగిన్ విజయవంతం"
-admin_controller_no_back_button = "లాగిన్ అయ్యేటప్పుడు బ్యాక్ బటన్ నోక్కకూడదు!"
 admin_controller_login_failed = "యూజర్ పేరు లేదా పాస్&zwnj;వర్డ్ సరి లేదు!"
 admin_controller_login_to_config = "కాన్ఫిగరేషన్ కొనసాగించడం కొరకు లాగిన్ చేయండి (డిఫాల్ట్: యూజర్ నేమ్ = root, పాస్ వర్డ్ =)"
 admin_controller_status_updates_stopped = "స్టేటస్ అప్డేట్స్ ఆగిపోయినవి. "
@@ -613,8 +612,6 @@ system_component_image_captcha = "చిత్రం Captcha"
 system_component_no_recovery = "ఏ యూజర్ పాస్వర్డ్ రికవరీ లింక్"
 system_component_email_recovery = "ఇమెయిల్ లింక్ పాస్వర్డ్ రికవరీ"
 system_component_email_questions = "ఇమెయిల్ లింక్ మరియు తనిఖీ ప్రశ్నలు రికవరీ"
-system_component_normal_authentication = "సాధారణ ప్రమాణీకరణ"
-system_component_zkp_authentication = "ZKP ప్రమాణీకరణ"
 system_component_enable = "ఎనేబుల్"
 system_component_disable = "ఆపివేయి"
 system_component_settings_updated = "సెట్టింగ్స్ అప్డేట్ చెయ్యబడినవి!"
@@ -772,8 +769,6 @@ register_view_return = "తిరిగి Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "సైన్ ఇన్"
-signin_view_signing_in = "న లాగింగ్"
-signin_view_login_failed = "లాగిన్ విఫలమైంది!"
 signin_view_username = "యూజర్ పేరు"
 signin_view_password = "పాస్&zwnj;వర్డ్ "
 signin_view_login = "లాగ్ ఇన్"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "డిఫాల్ట్ ప్రశ్
 searchsources_element_search = "శోధన"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "ప్రామాణీకరణ, యాక్సెస్, గోప్యతా, Captcha, మరియు రికవరీ"
-security_element_auth_and_access = "ప్రామాణికత మరియు యాక్సెస్"
-security_element_authentication_type = "ప్రమాణీకరణ పద్ధతి:"
-security_element_zero_unavailable = "సున్నా జ్ఞానం ప్రమాణీకరణ అవసరం OpenSSL లేదా BC గణిత!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Timezone:"
 security_element_token_name = "టోకెన్ పేరు:"
 security_element_session_name = "సెషన్ పేరు:"
diff --git a/src/locale/th/configure.ini b/src/locale/th/configure.ini
index 323935246..e5f892fa7 100755
--- a/src/locale/th/configure.ini
+++ b/src/locale/th/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "คุกกี้ต้องการการล็อกอิน!!"
 admin_controller_account_not_active = "บัญชีผู้ใช้ไม่อยู่ในภาวะใช้งาน บางทีการร้องขอรหัสผ่านใหม?"
 admin_controller_login_successful = "ล็อกอินสำเร็จ!!"
-admin_controller_no_back_button = "ไม่กลับปุ่มระหว่างการล็อกอิน!"
 admin_controller_login_failed = "ชื่อผู้ใช้หรือรหัสผ่านไม่ถูกต้อง!"
 admin_controller_login_to_config = "เข้าสู่ระบบเพื่อดำเนินการตั้งค่าคอนฟิก (ค่าเริ่มต้น: ชื่อผู้ใช้ = root รหัสผ่าน =)"
 admin_controller_status_updates_stopped = "สถานะปรับปรุงต้องหยุดได้แล้ว"
@@ -613,8 +612,6 @@ system_component_image_captcha = "ภาพ Captcha"
 system_component_no_recovery = "ไม่มีผู้ใช้รหัสผ่านการรักษาที่เชื่อมโยง"
 system_component_email_recovery = "อีเมลเชื่อมโยงรหัสผ่านการรักษา"
 system_component_email_questions = "อีเมลเชื่อมต่อและตรวจสอบคำถามหา"
-system_component_normal_authentication = "ปกติการตรวจสอบสิทธิ์"
-system_component_zkp_authentication = "ZKP การตรวจสอบสิทธิ์"
 system_component_enable = "เปิดใช้งาน"
 system_component_disable = "ปิดการใช้งาน"
 system_component_settings_updated = "ตั้งค่าการปรับปรุง!"
@@ -772,8 +769,6 @@ register_view_return = "กลับไป Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Signin"
-signin_view_signing_in = "การทำปูมบันทึกอยู่"
-signin_view_login_failed = "การล็อกอินล้มเหลว!"
 signin_view_username = "ชื่อผู้ใช้"
 signin_view_password = "รหัสผ่าน"
 signin_view_login = "ล็อกอิน"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "ค่าปริยายกับกา
 searchsources_element_search = "การค้นหา"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth,การเข้าถึงความเป็นส่วนตัว Captcha และการกู้คืน"
-security_element_auth_and_access = "การตรวจสอบสิทธิ์ของและเข้าถึง"
-security_element_authentication_type = "การตรวจสอบสิทธิ์ของประเภท:"
-security_element_zero_unavailable = "ศูนย์ความรู้การตรวจสอบสิทธิ์ต้องการใช้ openssl หรือบีซีคณิตศาสตร์!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "เขตเวลา:"
 security_element_token_name = "ตั๋วเข้าใช้งานอนชื่อ:"
 security_element_session_name = "ชื่อวาระการเชื่อมต่อ:"
diff --git a/src/locale/tl/configure.ini b/src/locale/tl/configure.ini
index 90e2fdd57..8dbd50868 100644
--- a/src/locale/tl/configure.ini
+++ b/src/locale/tl/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some non-English translations Powered by Yandex.translate (
 admin_controller_need_cookies = "Ang mga Cookies ay kinakailangan upang mag-login!!"
 admin_controller_account_not_active = "Account ay hindi na aktibo. Siguro humiling ng pag-reset ng password?"
 admin_controller_login_successful = "Mag-Login Matagumpay Na!!"
-admin_controller_no_back_button = "Walang Bumalik Na Pindutan Sa Panahon Ng Pag-Login!"
 admin_controller_login_failed = "Username o Password ng Tama!"
 admin_controller_login_to_config = "Mag-Login upang magpatuloy configuration (default: u=root, p=)"
 admin_controller_status_updates_stopped = "Mga update ng katayuan ay tumigil."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Captcha Imahe"
 system_component_no_recovery = "Walang Pagbawi Ng Password Ng Gumagamit Link"
 system_component_email_recovery = "Link Ng Email Sa Pagbawi Ng Password"
 system_component_email_questions = "Email na Link at Suriin ang mga Tanong na Pagbawi"
-system_component_normal_authentication = "Normal Na Pagpapatotoo"
-system_component_zkp_authentication = "ZKP Pagpapatunay"
 system_component_enable = "Paganahin"
 system_component_disable = "Huwag paganahin ang"
 system_component_settings_updated = "Mga Setting Ng Na-Update!"
@@ -772,8 +769,6 @@ register_view_return = "Bumalik sa Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Pag-Signin"
-signin_view_signing_in = "Pag-log sa"
-signin_view_login_failed = "Mag-Login Nabigo!"
 signin_view_username = "Username"
 signin_view_password = "Password"
 signin_view_login = "Pag-Login"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Default Na Mga Query:"
 searchsources_element_search = "Paghahanap"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Auth, pag-Access, sa Privacy, Captcha, at Pagbawi"
-security_element_auth_and_access = "Pagpapatunay at pag-Access"
-security_element_authentication_type = "Authentication Type:"
-security_element_zero_unavailable = "Zero Kaalaman sa Pagpapatunay ng Pangangailangan ng OpenSSL o BC Math!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Timezone:"
 security_element_token_name = "Token Pangalan:"
 security_element_session_name = "Session Pangalan:"
diff --git a/src/locale/tr/configure.ini b/src/locale/tr/configure.ini
index c5a2ff505..649206280 100755
--- a/src/locale/tr/configure.ini
+++ b/src/locale/tr/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "&Ccedil;erezler giriş i&ccedil;in gerekli!!"
 admin_controller_account_not_active = "Aktif hesap değil. Belki şifre sıfırlama isteği?"
 admin_controller_login_successful = "Giriş Başarılı!!"
-admin_controller_no_back_button = "Oturum A&ccedil;ma Sırasında Geri D&uuml;ğmesine!"
 admin_controller_login_failed = "Kullanıcı adı veya Hatalı Parola."
 admin_controller_login_to_config = "Yapılandırmaya devam etmek i&ccedil;in giriş (varsayılan: username=root ,     şifre=)"
 admin_controller_status_updates_stopped = "Durum g&uuml;ncellemeleri durduruldu."
@@ -613,8 +612,6 @@ system_component_image_captcha = "G&ouml;r&uuml;nt&uuml; Kaptan"
 system_component_no_recovery = "Kullanıcı Şifre Kurtarma Linki"
 system_component_email_recovery = "E-Posta Şifre Kurtarma Linki "
 system_component_email_questions = "Kurtarma e-posta Bağlantı ve Kontrol Soruları "
-system_component_normal_authentication = "Normal Kimlik Doğrulaması"
-system_component_zkp_authentication = "ZKP kimlik Doğrulama"
 system_component_enable = "Etkinleştir"
 system_component_disable = "Devre dışı bırak"
 system_component_settings_updated = "Ayarları G&uuml;ncellendi!"
@@ -772,8 +769,6 @@ register_view_return = "D&ouml;n&uuml;ş Yioop i&ccedil;in "
 ;
 ; SigninView.php
 signin_view_signin = "İmzalıyorum"
-signin_view_signing_in = "Oturum"
-signin_view_login_failed = "Giriş Başarısız Oldu!"
 signin_view_username = "Kullanıcı adı"
 signin_view_password = "Şifre"
 signin_view_login = "Giriş"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Varsayılan Sorgu:"
 searchsources_element_search = "Arama"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "Kimlik doğrulama, Erişim, Gizlilik, Kaptan ve Kurtarma"
-security_element_auth_and_access = "Kimlik doğrulama ve Erişim"
-security_element_authentication_type = "Kimlik Doğrulama Tipi:"
-security_element_zero_unavailable = "Sıfır Bilgisi kimlik Doğrulaması OpenSSL ya da M. &Ouml;. Matematik İhtiyacı var!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Zaman dilimi:"
 security_element_token_name = "Token Adı:"
 security_element_session_name = "Oturum Adı:"
diff --git a/src/locale/vi_VN/configure.ini b/src/locale/vi_VN/configure.ini
index c7775222c..aa26a9ec2 100755
--- a/src/locale/vi_VN/configure.ini
+++ b/src/locale/vi_VN/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "Cookies cần phải login!!"
 admin_controller_account_not_active = "T&agrave;i khoản kh&ocirc;ng hoạt động. C&oacute; lẽ y&ecirc;u cầu mật khẩu?"
 admin_controller_login_successful = "Đăng nhập th&agrave;nh c&ocirc;ng"
-admin_controller_no_back_button = "Kh&ocirc;ng C&oacute; N&uacute;t Quay Lại Trong Nhập!"
 admin_controller_login_failed = "T&ecirc;n đăng nhập họăc khẩu kh&ocirc;ng đ&uacute;ng"
 admin_controller_login_to_config = "Đăng nhập để tiếp tục cấu h&igrave;nh (mặc định: username = root, mật khẩu =)"
 admin_controller_status_updates_stopped = "Cập nhật t&igrave;nh trạng đ&atilde; dừng lại."
@@ -613,8 +612,6 @@ system_component_image_captcha = "Ảnh Mã Xác Nhận"
 system_component_no_recovery = "Không Có Người Sử Dụng Mật Khẩu Phục Hồi Kết"
 system_component_email_recovery = "Liên Kết Email Mật Khẩu Phục Hồi"
 system_component_email_questions = "Liên Kết Email và Kiểm tra câu Hỏi phục Hồi"
-system_component_normal_authentication = "Bình Thường Xác Thực"
-system_component_zkp_authentication = "ZKP Xác thực"
 system_component_enable = "Cho phép"
 system_component_disable = "Vô hiệu hóa"
 system_component_settings_updated = "Thiết Lập Cập Nhật!"
@@ -772,8 +769,6 @@ register_view_return = "Quay trở lại Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "Đăng nhập"
-signin_view_signing_in = "Đăng nhập vào"
-signin_view_login_failed = "Đăng Nhập Thất Bại!"
 signin_view_username = "T&ecirc;n đăng nhập "
 signin_view_password = "Mật khẩu"
 signin_view_login = "Đăng nhập"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "Mặc Định Vấn:"
 searchsources_element_search = "Tìm kiếm"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "N, Truy cập Mật Mã xác nhận, và phục Hồi"
-security_element_auth_and_access = "Xác thực và Truy cập"
-security_element_authentication_type = "Loại Xác Thực:"
-security_element_zero_unavailable = "Không có Kiến thức Thực Cần Doc hoặc BC Toán!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "Múi giờ:"
 security_element_token_name = "Thẻ Tên:"
 security_element_session_name = "Phiên Tên:"
diff --git a/src/locale/zh_CN/configure.ini b/src/locale/zh_CN/configure.ini
index 85517fd21..f6bfd73bd 100755
--- a/src/locale/zh_CN/configure.ini
+++ b/src/locale/zh_CN/configure.ini
@@ -33,7 +33,6 @@ translate_service = "Some translations Powered by Yandex.translate (http://trans
 admin_controller_need_cookies = "饼干需要登录!!"
 admin_controller_account_not_active = "帐户不活跃。 也许请求密码重置？"
 admin_controller_login_successful = "登入成功"
-admin_controller_no_back_button = "没有按钮在登录！"
 admin_controller_login_failed = "登入失敗"
 admin_controller_login_to_config = "登录以继续配置（默认：用户名=root，密码=）"
 admin_controller_status_updates_stopped = "管理員終止更新"
@@ -613,8 +612,6 @@ system_component_image_captcha = "验证码图像"
 system_component_no_recovery = "没有用户密码恢复链接"
 system_component_email_recovery = "电子邮件链接的密码恢复"
 system_component_email_questions = "电子邮件链接和检查的问题恢复"
-system_component_normal_authentication = "正常身份验证"
-system_component_zkp_authentication = "ZKP身份验证"
 system_component_enable = "启用"
 system_component_disable = "禁用"
 system_component_settings_updated = "设置，更新了!"
@@ -772,8 +769,6 @@ register_view_return = "回到Yioop"
 ;
 ; SigninView.php
 signin_view_signin = "登入"
-signin_view_signing_in = "记录上"
-signin_view_login_failed = "登录失败了！"
 signin_view_username = "使用者名稱"
 signin_view_password = "密碼"
 signin_view_login = "登入"
@@ -1224,10 +1219,8 @@ searchsources_element_defaultquery = "默认的查询:"
 searchsources_element_search = "搜索"
 ;
 ; SecurityElement.php
-security_element_auth_captcha = "身份验证，获取、隐私、验证和恢复"
-security_element_auth_and_access = "身份验证和访问"
-security_element_authentication_type = "认证类型："
-security_element_zero_unavailable = "零知识认证的需求OpenSSL或BC Math!"
+security_element_session_captcha = ""
+security_element_session = ""
 security_element_site_timezone = "时区："
 security_element_token_name = "令牌名称："
 security_element_session_name = "会议名称："
diff --git a/src/models/ProfileModel.php b/src/models/ProfileModel.php
index a751f4565..1889c0c5c 100755
--- a/src/models/ProfileModel.php
+++ b/src/models/ProfileModel.php
@@ -49,25 +49,22 @@ class ProfileModel extends Model
      * @var array
      */
     public $profile_fields = ['AD_LOCATION', 'API_ACCESS', 'AUTH_KEY',
-        'AUTHENTICATION_MODE', 'AUTOLOGOUT', 'AUXILIARY_CSS',
-        'BACKGROUND_COLOR', 'BACKGROUND_IMAGE', 'CACHE_LINK', 'CAPTCHA_MODE',
+        'AUTOLOGOUT', 'AUXILIARY_CSS', 'BACKGROUND_COLOR', 'BACKGROUND_IMAGE',
+        'CACHE_LINK', 'CAPTCHA_MODE',
         'CONFIGURE_BOT','CSRF_TOKEN', 'DEBUG_LEVEL', 'DESCRIPTION_WEIGHT',
         'DB_HOST', 'DBMS', 'DB_NAME', 'DB_PASSWORD', 'DB_USER',
         'DEFAULT_LOCALE', 'DIFFERENTIAL_PRIVACY',
-        'FAVICON', 'FIAT_SHAMIR_MODULUS', 'FOREGROUND_COLOR',
-        'GLOBAL_ADSCRIPT', 'GROUP_ITEM', 'GROUP_ANALYTICS_MODE', 'IN_LINK',
-        'IP_LINK', 'LANDING_PAGE',
+        'FAVICON', 'FOREGROUND_COLOR', 'GLOBAL_ADSCRIPT', 'GROUP_ITEM',
+        'GROUP_ANALYTICS_MODE', 'IN_LINK', 'IP_LINK', 'LANDING_PAGE',
         'LINK_WEIGHT', 'LOGO_SMALL', 'LOGO_MEDIUM', 'LOGO_LARGE',
         'MAIL_PASSWORD',  'MAIL_SECURITY',
         'MAIL_SENDER', 'MAIL_SERVER', 'MAIL_SERVERPORT', 'MAIL_USERNAME',
         'MIN_RESULTS_TO_GROUP',  'MONETIZATION_TYPE',
-        'MEDIA_MODE', 'NAME_SERVER',
-        'PRIVATE_DB_NAME', 'PRIVATE_DB_HOST', 'PRIVATE_DBMS',
-        'PRIVATE_DB_PASSWORD', 'PRIVATE_DB_USER', 'PROXY_SERVERS',
-        'RECOVERY_MODE', 'REGISTRATION_TYPE', 'RESULT_SCORE',
-        'ROBOT_INSTANCE','RSS_ACCESS',
-        'SEARCH_ANALYTICS_MODE', 'SEARCHBAR_PATH',
-        'SEND_MAIL_MEDIA_UPDATER', 'SESSION_NAME',
+        'MEDIA_MODE', 'NAME_SERVER', 'PRIVATE_DB_NAME', 'PRIVATE_DB_HOST',
+        'PRIVATE_DBMS', 'PRIVATE_DB_PASSWORD', 'PRIVATE_DB_USER',
+        'PROXY_SERVERS', 'RECOVERY_MODE', 'REGISTRATION_TYPE', 'RESULT_SCORE',
+        'ROBOT_INSTANCE','RSS_ACCESS', 'SEARCH_ANALYTICS_MODE',
+        'SEARCHBAR_PATH', 'SEND_MAIL_MEDIA_UPDATER', 'SESSION_NAME',
         'SIDE_ADSCRIPT', 'SIDEBAR_COLOR', 'SIGNIN_LINK', 'SIMILAR_LINK',
         'SUBSEARCH_LINK', 'TIMEZONE', 'TITLE_WEIGHT',
         'TOPBAR_COLOR', 'TOP_ADSCRIPT','TOR_PROXY', 'USE_FILECACHE',
@@ -356,8 +353,7 @@ class ProfileModel extends Model
                 PASSWORD VARCHAR(" . C\LONG_NAME_LEN . "), STATUS INTEGER,
                 HASH VARCHAR(" . C\LONG_NAME_LEN . "),
                 CREATION_TIME VARCHAR(" . C\MICROSECOND_TIMESTAMP_LEN .
-                "), UPS INTEGER DEFAULT 0, DOWNS INTEGER DEFAULT 0,
-                ZKP_PASSWORD CHAR(" . C\ZKP_PASSWORD_LEN . "))",
+                "), UPS INTEGER DEFAULT 0, DOWNS INTEGER DEFAULT 0)",
             "USRS_USER_NAME_INDEX" => "CREATE INDEX USRS_USER_NAME_INDEX ON
                 USERS(USER_NAME)",
             "USER_GROUP" => "CREATE TABLE USER_GROUP (USER_ID INTEGER,
diff --git a/src/models/SigninModel.php b/src/models/SigninModel.php
index 3f3e0b24c..8cd8d62ee 100755
--- a/src/models/SigninModel.php
+++ b/src/models/SigninModel.php
@@ -51,12 +51,8 @@ class SigninModel extends Model
     public function checkValidSignin($username, $password)
     {
         $db = $this->db;
-        $result = $this->getUserDetails($username);
-        if (!$result) {
-            return false;
-        }
-        $row = $db->fetchArray($result);
-        if (empty($row)) {
+        $row = $this->getUserDetails($username);
+        if (!$row) {
             return false;
         }
         // avoid timeing attacks if possible
@@ -75,7 +71,7 @@ class SigninModel extends Model
     public function getUserDetails($username)
     {
         $db = $this->db;
-        $sql = "SELECT USER_NAME, PASSWORD, ZKP_PASSWORD FROM USERS ".
+        $sql = "SELECT USER_NAME, PASSWORD FROM USERS ".
             "WHERE LOWER(USER_NAME) = LOWER(?) " . $db->limitOffset(1);
         $i = 0;
         do {
@@ -85,39 +81,11 @@ class SigninModel extends Model
             $result = $db->execute($sql, [$username]);
             $i++;
         } while (!$result && $i < 2);
-        return $result;
-    }
-    /**
-     * Checks one round of username and password in case of ZKP authentication
-     * via the Fiat Shamir protocol. Let S be the user's password (not stored
-     * on server, secret, and co-prime to some public $n = pq).
-     * V = S^2 mod $n is stored on the server and is assumed to be publicly
-     * known.
-     * Idea is that previously
-     * (1) client sent server an x = r^2 mod $n
-     * (2) the server sent a random e in {0, 1} to client
-     * Now the server has just received y = r S^e mod $n.
-     * and verifies y^2 = r^2(S^2)^e = xV^e mod $n.
-     *
-     * @param string $username which login to verify
-     * @param string $x as described above in the comment
-     * @param string $y as described above in the comment
-     * @param string $e random exponent to use
-     * @param string $n modulus to use for Fiat Shamir
-     * @return bool
-     */
-    public function checkValidSigninForZKP($username, $x, $y, $e, $n)
-    {
-        $db = $this->db;
-        $result = $this->getUserDetails($username);
         if (!$result) {
             return false;
         }
         $row = $db->fetchArray($result);
-        $v = $row['ZKP_PASSWORD'];
-        $rp = bcmod(bcmul($x, bcmod(bcpow($v, $e), $n)), $n);
-        $lp = bcmod(bcmul($y, $y), $n);
-        return (bccomp($rp, $lp) == 0);
+        return $row;
     }
     /**
      * Checks that a username email pair is valid
@@ -201,17 +169,4 @@ class SigninModel extends Model
             [L\crawlCrypt($password), $username]);
         return $result != false;
     }
-    /**
-     * Changes the password of a given user in case of ZKP authentication
-     *
-     * @param string $username username of user to change password of
-     * @param string $password new password for user
-     * @return bool update successful or not.
-     */
-    public function changePasswordZKP($username, $password)
-    {
-        $sql = "UPDATE USERS SET ZKP_PASSWORD=? WHERE USER_NAME = ? ";
-        $result = $this->db->execute($sql, [$password, $username]);
-        return $result != false;
-    }
 }
diff --git a/src/models/UserModel.php b/src/models/UserModel.php
index 7a1fd2b51..270ed33df 100755
--- a/src/models/UserModel.php
+++ b/src/models/UserModel.php
@@ -387,31 +387,28 @@ class UserModel extends Model
      *
      * @param string $username  the username of the user to be added
      * @param string $password  the password in plaintext
-     *      of the user to be added, and ZKP auth not being used (else
-     *      this can be the empty string)
+     *      of the user to be added
      * @param string $firstname the firstname of the user to be added
      * @param string $lastname the lastname of the user to be added
      * @param string $email the email of the user to be added
      * @param int $status one of ACTIVE_STATUS, INACTIVE_STATUS, or
      *      SUSPENDED_STATUS
-     * @param string $zkp_password  the password parameters needed to
-     *      verify a Fiat-Shamir password
      * @return mixed false if operation not successful, user_id otherwise
      */
     public function addUser($username, $password, $firstname = '', $lastname='',
-        $email = '', $status = C\ACTIVE_STATUS, $zkp_password = '')
+        $email = '', $status = C\ACTIVE_STATUS)
     {
         $creation_time = L\microTimestamp();
         $db = $this->db;
         $sql = "INSERT INTO USERS(FIRST_NAME, LAST_NAME,
             USER_NAME, EMAIL, PASSWORD, STATUS, HASH,
-            CREATION_TIME, ZKP_PASSWORD) VALUES (
-            ?, ?, ?, ?, ?, ?, ?, ?,?)";
+            CREATION_TIME) VALUES (
+            ?, ?, ?, ?, ?, ?, ?, ?)";
         $username = mb_strtolower($username);
         $result = $db->execute($sql, [$firstname, $lastname,
             $username, $email, L\crawlCrypt($password), $status,
             L\crawlCrypt($username . C\AUTH_KEY . $creation_time),
-            $creation_time, $zkp_password]);
+            $creation_time]);
         if (!$user_id = $this->getUserId($username)) {
             return false;
         }
diff --git a/src/scripts/zkp.js b/src/scripts/zkp.js
deleted file mode 100644
index d064a1ef9..000000000
--- a/src/scripts/zkp.js
+++ /dev/null
@@ -1,244 +0,0 @@
-/**
- * SeekQuarry/Yioop --
- * Open Source Pure PHP Search Engine, Crawler, and Indexer
- *
- * Copyright (C) 2009 - 2020  Chris Pollett chris@pollett.org
- *
- * LICENSE:
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- * END LICENSE
- *
- * @author Akash Patel (edited by Chris Pollett chris@pollett.org)
- * @license https://www.gnu.org/licenses/ GPL3
- * @link https://www.seekquarry.com/
- * @copyright 2009 - 2020
- * @filesource
- */
-/*
- * Returns RSA like modulus.
- *
- * @param String id identifier of a hidden input field containing the
- *     modulus to use in the Fiat Shamir Protocol
- * @return BigInt RSA-like modulus.
- */
-function getN(id)
-{
-    var n = elt(id).value;
-    return str2BigInt(n, 10, 0);
-}
-/*
- * Generates Fiat shamir parameters such as x and y and append
- * with the input form
- *
- * @param Object fiat_shamir_id id of the form
- * @param String sha1 of the user password
- * @param int e random value sent by the server. Either 0 or 1.
- * @param String user_name id of the form
- * @param String modulus_id identifier of hidden field with modulus to use in
- *     Fiat Shamir
- */
-function dynamicForm(zkp_form_id, sha1, e, user_name, modulus_id)
-{
-    var zkp_form = elt(zkp_form_id);
-    var n = getN(modulus_id);
-    var r = getR(n);
-    var x = multMod(r, r, n);
-    var y = getY(sha1, e, r, n);
-    var input_x = ce('input');
-    input_x.type = 'hidden';
-    input_x.name = 'x';
-    input_x.value = bigInt2Str(x, 10);
-    var input_y = ce('input');
-    input_y.type = 'hidden';
-    input_y.name = 'y';
-    input_y.value = bigInt2Str(y, 10);
-    var input_username = ce('input');
-    input_username.type = 'hidden';
-    input_username.name = 'u';
-    input_username.value = user_name;
-    zkp_form.appendChild(input_x);
-    zkp_form.appendChild(input_y);
-    zkp_form.appendChild(input_username);
-    zkp_form.submit();
-}
-/*
- * Generates Fiat shamir parameters Y. When user gives username, password
- * for the first time it stored the password on the cookie. From rest of
- * the Fiat shamir iteration it uses password stores on the client side
- * cookie.
- *
- * @param String sha1 sha1 of the password
- * @param int e random value sent by the server. Either 0 or 1.
- * @param BigInt r random value picked by the client
- * @param BigInt n RSA like modulus
- * @return BigInt y fiat-shamir parameter Y.
- */
-function getY(sha1, e, r, n)
-{
-    var s = str2BigInt(sha1, 16, 0);
-    var se;
-    if (e == 0) {
-        se = '1';
-        se = str2BigInt(se, 10, 0);
-    } else {
-        se = s;
-    }
-    y = multMod(r, se, n);
-    return y;
-}
-/*
- * Generates random number and converts it into BigInteger in provided range
- *
- * @param BigInt range. Random number be from 0 to range - 1
- * @return BigInteger final_r random BigInteger
- */
-function getR(range)
-{
-    var len = range.length;
-    var random_words;
-    var got_r = false;
-    if (window.crypto && window.crypto.getRandomValues) {
-        random_words = new Int32Array(Math.floor(len/4) + 1);
-        window.crypto.getRandomValues(random_words);
-
-    } else if (window.msCrypto && window.msCrypto.getRandomValues) {
-        random_words = new Int32Array(Math.floor(len/4) + 1);
-        window.msCrypto.getRandomValues(random_words);
-    } else {
-        /*  if you're in this case you are using an old browser and someone
-            might be able to fool you (still hard)
-         */
-        var r = "";
-        var digit;
-        for (var i = 0; i < len; i++) {
-            digit  = Math.floor((Math.random() * 10) + 1);
-            r += digit.toString();
-        }
-        r = str2BigInt(r, 10, 0);
-        got_r = true;
-    }
-    if (!got_r) {
-        for (var i = 0; i < random_words.length; i++) {
-            r += random_words[i].toString();
-        }
-        r = str2BigInt(r, 256, 0);
-    }
-    var final_r = bigMod(r, range);
-    return final_r;
-}
-/*
- * Generates Fiat shamir parameters such as x and y and append
- * with the input form. This method calls first time when user
- * provides user name and password
- *
- * @param Object zkp_form_id identifier of the form with zkp data
- * @param String username_id identifier of the form element with the username
- * @param String password_id identifier of the form element with the password
- * @param int e random value send by the server. Either 0 or 1.
- * @param int auth_count number of Fiat-Shamir iterations
- */
-function generateKeys(zkp_form_id, username_id, password_id,
-    modulus_id, e, auth_count)
-{
-    var password = elt(password_id).value;
-    var u = elt(username_id).value;
-    var token_object = elt('CSRF-TOKEN');
-    var token = token_object.value;
-    var token_name = token_object.name;
-    var sha1 = generateSha1(password);
-    var n = new getN(modulus_id);
-    var auth_message = elt('auth-message').value;
-    $i = 0;
-    for (var i = 0; i < 2 * auth_count; i++) {
-        if (i% 5 == 0) {
-            auth_message += ".";
-            elt('message').innerHTML = "<h1 class=\"red\" >" + auth_message +
-                "</h1>";
-        }
-        var r = getR(n);
-        var x = multMod(r, r, n);
-        var y = getY(sha1, e, r, n);
-        var x_string = bigInt2Str(x, 10);
-        var y_string = bigInt2Str(y, 10);
-        sendFiatShamirParameters(x_string, y_string, u, token, token_name, i);
-        var e_temp = elt("salt-value").value;
-        e_temp = e_temp + '';
-        if (e_temp == 'done1') {
-            e = 1;
-            break;
-        } else if (e_temp == 'done0') {
-            e = 0;
-            break;
-        }
-        e = parseInt(e_temp);
-        if (e == -1) {
-            e = 1;
-            break;
-        }
-    }
-    elt(password_id).value = null;
-    if (i == 2 * auth_count) {
-        doMessage("<h1 class=\"red\" >"+elt('auth-fail-message').value+"</h1>");
-        return;
-    }
-    dynamicForm(zkp_form_id, sha1, e, u, modulus_id);
-}
-/*
- * Sends Fiat-Shamir via AJAX parameters and receives parameter e from server
- *
- * @param BigInt x Fiat-Shamir parameter x
- *     (@see SigninModel::checkValidSigninForZKP for details)
- * @param BigInt y Fiat-Shamir parameter y
- * @param String u username provided by user
- * @param String token CSRF token sent by the server
- * @param String token_name name to use for CSRF token
- * @param String round_num on the server this is used only to see if 0
- *     in which case it restarts the count
- */
-function sendFiatShamirParameters(x, y, u, token, token_name, round_num)
-{
-    var http = new XMLHttpRequest();
-    var url = "./";
-    var params = "c=admin&x=" + x + "&y=" + y +"&u=" + u +
-        "&"+token_name+"=" + token + "&round_num=" + round_num;
-    http.open("post", url, false);
-    http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
-    http.onreadystatechange = function () {
-        if (http.readyState == 4 && http.status == 200) {
-            elt("salt-value").value = http.responseText;
-        }
-    }
-    http.send(params);
-}
-/*
- * This function is used during create account module and when
- * authentication mode is ZKP.
- *
- * @param String password_id element that holds ZKP password
- * @param String repassword_id element that holds retyped ZKP password
- * @param String modulus_id element that holds fiat shamir modulus
- */
-function registration(password_id, repassword_id, modulus_id)
-{
-    var password = elt(password_id);
-    var repassword = elt(repassword_id);
-    var sha1 = generateSha1(password.value);
-    var x = str2BigInt(sha1, 16, 0);
-    var n = getN(modulus_id);
-    var z = multMod(x, x, n);
-    password.value = bigInt2Str(z, 10);
-    repassword.value = bigInt2Str(z, 10);
-}
diff --git a/src/views/RegisterView.php b/src/views/RegisterView.php
index 602faac7b..03ff74755 100755
--- a/src/views/RegisterView.php
+++ b/src/views/RegisterView.php
@@ -122,21 +122,7 @@ class RegisterView extends View
                 src="<?= C\BASE_URL . $logo ?>" alt="<?= $this->logo_alt_text
                 ?>" /></a><span> - <?=tl('register_view_create_account')
                 ?></span></h1>
-            <?php
-            if ($data['AUTHENTICATION_MODE'] == C\ZKP_AUTHENTICATION) { ?>
-                <form method="post"
-                    onsubmit="registration('pass-word', 'retype-password', <?php
-                    ?>'fiat-shamir-modulus')">
-                <input type="hidden" name="fiat_shamir_modulus"
-                    id="fiat-shamir-modulus"
-                    value="<?=$data['FIAT_SHAMIR_MODULUS'] ?>"/>
-                <?php
-            } else {
-                ?>
-                <form method="post">
-                <?php
-            }
-            ?>
+            <form method="post">
             <input type="hidden" name="c" value="register" />
             <input type="hidden" name="a" value="processAccountData" />
             <?php
diff --git a/src/views/SigninView.php b/src/views/SigninView.php
index 876daf05f..503e57691 100755
--- a/src/views/SigninView.php
+++ b/src/views/SigninView.php
@@ -67,25 +67,7 @@ class SigninView extends View
             }?>"><img src="<?=C\BASE_URL .
             $logo ?>" alt="<?= $this->logo_alt_text
             ?>" /></a><span> - <?=tl('signin_view_signin') ?></span></h1>
-        <?php if (isset($data['AUTH_ITERATION'])) { ?>
-                <form  method="post" id="zkp-form"
-                    onsubmit="generateKeys('zkp-form','username', <?php
-                    ?>'password', 'fiat-shamir-modulus', '<?=
-                    $_SESSION['SALT_VALUE'] ?>', <?=
-                    $data['AUTH_ITERATION'] ?>)" >
-                <input type="hidden" name="fiat_shamir_modulus"
-                    id="fiat-shamir-modulus"
-                    value="<?=$data['FIAT_SHAMIR_MODULUS'] ?>"/>
-                <input type="hidden" id="salt-value" name="salt_value" />
-                <input type="hidden" id="auth-message"
-                    name="auth_message" value="<?=
-                    tl('signin_view_signing_in') ?>" />
-                <input type="hidden" id="auth-fail-message"
-                    name="auth_fail_message" value="<?=
-                    tl('signin_view_login_failed') ?>" />
-        <?php } else {?>
-                <form method="post">
-        <?php } ?>
+        <form method="post">
         <div class="login">
             <table>
             <tr>
diff --git a/src/views/elements/ManageaccountElement.php b/src/views/elements/ManageaccountElement.php
index 595d7e321..529353f1f 100755
--- a/src/views/elements/ManageaccountElement.php
+++ b/src/views/elements/ManageaccountElement.php
@@ -82,21 +82,8 @@ class ManageaccountElement extends Element
                 $edit_or_no_img?>" title='<?=$edit_or_no_text ?>' alt='<?=
                 $edit_or_no_text ?>' /></a>
                 </small></h2>
-            <?php
-            if (isset($data['EDIT_PASSWORD']) &&
-                C\AUTHENTICATION_MODE == C\ZKP_AUTHENTICATION) { ?>
-                <form method="post"
-                    onsubmit="registration('new-password','retype-password',
-                    'fiat-shamir-modulus')">
-                <input type="hidden" name="fiat_shamir_modulus"
-                    id="fiat-shamir-modulus"
-                    value="<?= $data['FIAT_SHAMIR_MODULUS'] ?>"/>
-                <?php
-            } else { ?>
-                <form id="changeUserForm" method="post"
-                    autocomplete="off" enctype="multipart/form-data">
-            <?php
-            }
+            <form id="changeUserForm" method="post"
+                autocomplete="off" enctype="multipart/form-data"><?php
             $row_col_span = 'rowspan="4"';
             if (isset($data['EDIT_USER'])) {
                 $row_col_span = 'rowspan="7"';
diff --git a/src/views/elements/ManageusersElement.php b/src/views/elements/ManageusersElement.php
index 68716d0da..11581ac34 100644
--- a/src/views/elements/ManageusersElement.php
+++ b/src/views/elements/ManageusersElement.php
@@ -238,16 +238,8 @@ class ManageusersElement extends Element
             "$f_amp;group_filter=".$data['GROUP_FILTER'] : "";
         $base_url .= $visibles;
         $edituser = ($data['FORM_TYPE'] == "edituser") ? true: false;
-        if ($data['AUTHENTICATION_MODE'] == C\ZKP_AUTHENTICATION) { ?>
-            <form id="admin-form" method="post"
-                onsubmit="registration('pass-word','retype-password',
-                'fiat-shamir-modulus')">
-            <input type="hidden" name="fiat_shamir_modulus"
-                id="fiat-shamir-modulus"
-                value="<?= $data['FIAT_SHAMIR_MODULUS'] ?>"/><?php
-        } else { ?>
-           <form id="admin-form" method="post" autocomplete="off" ><?php
-        }
+        ?>
+        <form id="admin-form" method="post" autocomplete="off" ><?php
         if ($edituser) {
             e("<h2>".tl('manageusers_element_user_info'). "</h2>");
         } else {
diff --git a/src/views/elements/SecurityElement.php b/src/views/elements/SecurityElement.php
index 07f3d647d..022b0c8e1 100755
--- a/src/views/elements/SecurityElement.php
+++ b/src/views/elements/SecurityElement.php
@@ -56,7 +56,7 @@ class SecurityElement extends Element
             $data['LOCALE_TAG'];
         ?>
         <div class = "current-activity">
-        <h2><?= tl('security_element_auth_captcha') ?></h2>
+        <h2><?= tl('security_element_session_captcha') ?></h2>
         <form class="top-margin" method="post">
             <input type="hidden" name="c" value="admin" />
             <input type="hidden" name="a" value="security"/>
@@ -66,23 +66,11 @@ class SecurityElement extends Element
             <div class="top-margin">
             <fieldset>
                 <legend><b><?=
-                tl('security_element_auth_and_access').
+                tl('security_element_session').
                 "&nbsp;" . $this->view->helper("helpbutton")->render(
-                    "Authentication Type", $data[C\CSRF_TOKEN])
+                    "Session Parameters", $data[C\CSRF_TOKEN])
                 ?>
                 </b></legend>
-                <div><b><label for="authentication-mode"><?=
-                    tl('security_element_authentication_type')?></label></b>
-                    <?php $this->view->helper("options")->render(
-                        "authentication-mode", "AUTHENTICATION_MODE",
-                         $data['AUTHENTICATION_MODES'],
-                         $data['AUTHENTICATION_MODE']);
-                    if (isset($data['ZKP_UNAVAILABLE']) &&
-                        $data['ZKP_UNAVAILABLE']) {
-                        e('<div class="red">'.
-                            tl('security_element_zero_unavailable')."</div>");
-                    } ?>
-                </div>
                 <div class="top-margin"><b><label for="timezone"><?=
                     tl('security_element_site_timezone') ?></label></b>
                 <input type="text" id="timezone"