koseven/modules/encrypt/config/encrypt.php

<?php
/**
 * The following options must be set:
 * string   type    Driver Type
 * string   key     Secret Passphrase
 */
return [
	'default' => [
		'type'	 => 'openssl',
		'key'	 => NULL,
		'cipher' => Encrypt_Engine_Openssl::AES_256_CBC
	],
//	  'sodium' => [
//		'type'    => 'sodium',
//		'key'     => NULL,
//		'cipher'  => Encrypt_Engine_Sodium::AES_256_GCM
//    ]
//    /**
//     * Mcrypt is deprecated and should not be used,
//     * however it requires additional options:
//     *
//     * integer  mode    encryption mode, one of MCRYPT_MODE_*
//     * integer  cipher  encryption cipher, one of the Mcrypt cipher constants
//     */
//    'mcrypt' => [
//        'type'   => 'mcrypt',
//        'key'    => NULL,
//        'cipher' => MCRYPT_RIJNDAEL_128,
//        'mode'   => MCRYPT_MODE_CBC,
//    ],
];