in reply to Encrypting script (was Encripting scipt)

The short answer: You can't.

Longer answer: You can, but it won't hold up. For your program to continue working, the source still has to be there in some form or another. This different form of your code might (emphasis on "might") be harder for a determined person to read, but if they have enough time they can recover the source or at worst an obfuscated version of the source.