I think my correction is correct, but I don't have time to do check and to do better ...
(I use TB 1.0.5 & PHP 7.1.9)
You have to select "Use Rijndael with the openssl extension" in the BO > Advanced Parameters > Performance > Encryption
in file : classes\Rijndael.php , line 68
```
public function encrypt($plaintext)
{
if (mbstrlen($this->key, '8bit') !== 32) {
return false;
}
if (function_exists('openssl_encrypt')) {
// Correction of a BUG !!
$ivsize = openssl_cipher_iv_length('aes-256-cbc');
try {
$iv = random_bytes($ivsize);
} catch (Exception $e) {
if (function_exists('openssl_random_pseudo_bytes(')) {
$iv = openssl_random_pseudo_bytes($ivsize);
} else {
throw new Exception('No secure random number generator found on your system.');
}
}
//**************************************//
$ciphertext = openssl_encrypt(
$plaintext,
'aes-256-cbc',
$this->_key,
OPENSSL_RAW_DATA,
$iv
);
} else {
```
