A PHP Error was encountered

Severity: Warning

Message: openssl_encrypt(): Using an empty Initialization Vector (iv) is potentially insecure and not recommended

Filename: models/Model_security.php

Line Number: 145

Backtrace:

File: /var/www/2021/application/models/Model_security.php
Line: 145
Function: openssl_encrypt

File: /var/www/2021/application/controllers/Login.php
Line: 334
Function: csrf

File: /var/www/2021/index.php
Line: 321
Function: require_once