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Cryptography

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  • $\begingroup$ A bit shift sounds alot like a permutation in crypto terms although I didn't really understand the question, because 'bit shift' in my mind is just an operation, much like addition or multiplication. $\endgroup$ Commented Jun 2, 2013 at 2:36
  • $\begingroup$ It feels different to me because I don't know that it can be expressed algebraically but I guess that's part of my question. $\endgroup$ Commented Jun 5, 2013 at 1:18
  • $\begingroup$ You can think of bit rotation as an algebraic operation in the same way as an LFSR. Indeed, it is an LFSR with feedback polynomial $x^k-1$. $\endgroup$ Commented Nov 27, 2013 at 15:54