In cryptography, Mutual Irregular Clocking KEYstream generator (MICKEY) is a stream cipher algorithm developed by Steve Babbage and Matthew Dodd.
Then a variable length IV and the 80 bit Key is used to update the state by successively executing CLOCK KG routine.
The attacker has the following advantages: To hide the mapping between the scan cells and the actual variables of a cipher is what drove the previous single-feedback and Double-Feedback XOR-Chain schemes.
As this is also falling prey to cryptanalysis, as shown in the previous section, we move towards a further secure architecture, named as random XOR-Chain (rXOR-Chain) structure.
It was shown that if all flip-flops in the scan-chain are initially RESET, then the positions of the inverters can be completely determined by the 0 → 1 and 1 → 0 transitions in the scanned-out vector.