Flash encryption and PHP decryption

I was looking around for some encryption/decryption methods in flash that works also with PHP. And I found some interesting websites with a simple explanation. The first one is a simple XOR encryption/decryption inside flash.

http://blog.yofla.com/2009/03/as3-encrypt-and-decrypt-textxml/

The second website I found uses the as3Crypto library and decrypts it on the server side using PHP. The links for the explanation and the library the use are here:

http://www.zedia.net/2009/as3crypto-and-php-what-a-fun-ride/

http://code.google.com/p/as3crypto/

The third website I found is also interesting and has some data service libraries for Flash, Air and PHP:

http://code.google.com/p/as3-to-php-aes-dataservice/

This last one is based on some JavaScript functions found on the following page. This could be usefull with AJAX like applications.

http://www.movable-type.co.uk/scripts/aes.html