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Aug
27
comment How does asymmetric encryption work?
@Jug True. For very simple examples this falls down fairly easily; however, the nth-root under a modulus becomes more difficult. Multiplication as a whole often has situations where division is a much more difficult concept (matrices, for example). Obviously it doesn't make a great cryptosystem, but it is a place to start to look for possible trapdoor functions compared to addition, which is usually quite simple to reverse.
Aug
26
comment If a cryptanalytic breakthrough is made, what process should be followed?
I've edited the question to make it more generic; let me know what you think (I can always roll it back, or the OP can). I think, personally, that it is a difficult case to decide if this question is in-scope, so I'll be guided by everyone else. Also, I've introduced an ethics tag which may or may not be a good idea - anyone with any better suggestions (soft-question?) please shout.
Jul
26
comment UMAC: to what extent is it in use today?
I think that pretty much covers everything I wanted to know... have a green tick!
Jul
14
comment How do I apply differential cryptanalysis to a block cipher?
Thanks for that; I've had a chance to review those links and they're definitely helpful!
Jul
12
comment Necessity of Randomness of Salts?
@PaĆ­lo Thomas answers this in his comment with the two-password same salt problem. Perhaps I should have a 3) for that? Also, there is a practical consideration - what happens if you change user name for any reason? You'd need to recompute the hash, so you'd need the password to be input. That may or may not be acceptable to you.