To consider ROT13 and perlc to be forms of encryption,
To consider ROT13 to be encryption, you have to know the definition of encryption. You choose to ignore it. I can't help you with that.
I'm sure I'll get more negative reputation for this - someone should probably go to Wikipedia (and every other technical source on the subject) and let them know that Ikegami has redefined encryption and ROT13 no longer counts.
Furthermore, I don't think we agree on the word intact:
The code is not intact, it is transformed by the key. Whether or not you want to admit that "weak encryption" exists is up to you, but the code is not intact in the executable.
This is the most ridiculous conversation I've had on the net, and that's saying a lot.