Comment 1 for bug 815475

(at least as long as the engine API is in Java): The easiest way to protect your script, is to have it in Java and distribute it as a self contained .jar (there has to be invested some work, to make the lib files loadable on the target machine (like it is already done for the Tesseract stuff (OCR)).

Even using Scala, Groovy or JRuby (my first choice) is possible to make this happen.

The Python level (Sikuli script level) is not suitable to protect your code (at least not as a feature, that is available on the three platforms)

There are many tools available to wrap everything into an .exe, if you like.