the code still has to run. stuff like this is trivial to invert using a virtual machine that records what executed and also records modifications to code. you a

the code still has to run. stuff like this is trivial to invert using a virtual machine that records what executed and also records modifications to code. you also suffer from the problem / weakness of having the decryptor for your code, in the code you give out. now if you can avoid that (by applying some transform that allows the program to function but without having to carry its inverse) then ...