Crypt_XXTEA pear.php.net Encryption LGPL License An implementation of the XXTEA encryption algorithm. NOTICE: unregular default behavior. This package allows you to encrypt and decrypt strings or long integer arrays with the XXTEA encryption algorithm, which is secure, fast and suitable for web development. NOTICE: Due to some historical reasons, this package's default behavior DIFFER to regular encryption classes. And the author will think over the solution.