I've developed a Perl script that the a confidential business logic.

I have to give this script to another Perl coder to test it in his environment. He will definitely try to extract the logic in my program. So I want to make my script impossible, or at least very very hard, to understand.

I've tried a few sites like liraz, but they did not work for me. The encoded Perl script does not work the same as the original one.