Dynamic Code Encryption in OS X: the crackme example!

The title of this post is a partial rip-off of Dynamic Code Encryption as an Anti Dump and Anti Reverse Engineering measure blogpost. Alexey describes a technique similar to the one I used in my crackme, which isn’t altogether that new. His post is a good introduction to some possible attack vectors and what is at stake. You should give it a look.
The crackme uses a multi-layer dynamic code encryption approach, with two different encryption algorithms (Rabbit and Salsa).

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