Yes: the term the VX scene uses is "crypter". Code size and unusualness/uniqueness are goals here, as they're for obfuscation, not strong encryption - the code

Yes: the term the VX scene uses is "crypter". Code size and unusualness/uniqueness are goals here, as they're for obfuscation, not strong encryption - the code needs to be small, hard for an AV to recognise with a heuristic (so tables and baked constants are bad) and ideally amenable to being passed through a polymorphic/metamorphic mutation engine.