public function decryptValue($value)
    {
        $decoded = base64_decode($value);
        $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
        $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
        $text = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $this->salt, $decoded, MCRYPT_MODE_ECB, $iv);

        return trim($text);
    }