Encriptar con semilla?

[NUCKLEAR]

Quizas te sirva :

Código PHP:

<?php
 
define('KEY', 'passphrase');
 
function encripta($text)
{
    return trim(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, KEY, $text, MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND))));
}
 
function desencripta($text)
{
    return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, KEY, base64_decode($text), MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND)));
}
 
echo encripta("192.168.1.1 mensaje oculto fecha");
echo "<br />";
echo desencripta("nQfWYpsaqRF3CaP4NrjBbVx6KyItQgw5NPAHKiPVb/8=");
 
 
?>
 

Serialize

Saludos.