Symmetric encryption implementation

[Drezard]

Writing an app that requires symmetric encryption.

 

I need to be able to have a key (such as 123) and be able to use this key and encrypt a string. Then decrypt the string later using the same key.

 

This encryption needs to be pretty robust and unbreakable.

 

Any functions or suggestions?!? Thinking of using the mcrypt library in some way.

 

Drez

[bob2006]

does this work for you

<?php 
    echo("<h3> Symmetric Encryption </h3>"); 
    $key_value = "KEYVALUE"; 
    $plain_text = "PLAINTEXT"; 
    $encrypted_text = mcrypt_ecb(MCRYPT_DES, $key_value, $plain_text, MCRYPT_ENCRYPT); 
    echo ("<p><b> Text after encryption : </b>"); 
    echo ( $encrypted_text ); 
    $decrypted_text = mcrypt_ecb(MCRYPT_DES, $key_value, $encrypted_text, MCRYPT_DECRYPT); 
    echo ("<p><b> Text after decryption : </b>"); 
    echo ( $decrypted_text ); 
    ?> 

 

[simshaun]

It may be overkill for what you want, but check out phpseclib.