if it was that easy then everyone would be doing it
also you mentioned cracked software, do you trust the source enough to load it on?
years ago when it was EPROM chips in ecu's you could copy them no bother and the car companies caught on to chipping ect and changed it so that the only way to alter it was to re-write the whole ECU.
I remember one guy who had an RS500 which came with two chips. a lower 300bph one IIRC and a 500 bhp one. However when he bought his it only had the lower one in it and not the higher one and ford wanted a fortune to get a new one. he then seen one for sale in a mag which was a copy EPROM and got it thinking it was ok. but his engine went pop not long after fitting it as the software was buggered 
ONE - i dont give a %^*& how encrypted the code is 64 bit 128 bit whatever - if someone wanted to crack it they WOULD.
TWO - where do you think the revo remap was born from - do you think it just dropped off a tree in the form of some machine code....hmm.......?????
SOMEONE WROTE IT (collective description)
therefore i'm posing the question - it wouldn?t be impossible for another individual possessing the required knowhow and willing to devote the required resources, both in terms of financial and duration to make another version and u/load it onto an ecu would it!!!!!!!!!!!!!!!!!!
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