Check out http://appwithphp.com/cryptography-and-php/ http://appwithphp.com/cryptography-and-php/ - it's a beginner/intermediate overview of how to implement on

Check out http://appwithphp.com/cryptography-and-php/ http://appwithphp.com/cryptography-and-php/ - it's a beginner/intermediate overview of how to implement one-way and two-way hashing/encryption in PHP. The concepts should be transferable to other languages though.