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Jan
8
comment Rule 30 Cellular Automaton for Cryptography
@IlmariKaronen: The "attack" seems highly theoretical, but I guess it was enough to scare Mr. Wolfram into not recommending it be used in stream ciphers. Wolfram showed the Rule 30 PRG to Richard Feynman and Shafi Goldwasser when he was consulting for Thinking Machines ( Hillis) back in the 80's and he says they couldn't "crack" it. But I guess breaking generators is a highly specialized craft and Meier and Staffelbach are the heavyweights in that game :-)
Jan
7
asked Rule 30 Cellular Automaton for Cryptography
Oct
31
comment Do Weak Elliptic Curves Exist?
@Circonflexe: Plus vote for Snowden being a double agent! The notion that someone could expose NSA "secrets" publicly and not be killed in about two seconds is a hoot !
Feb
18
awarded  Nice Question
Sep
24
awarded  Autobiographer
Aug
26
awarded  Popular Question
Aug
23
comment Nonlinearity of the J-K Flip Flop
@DW: I'm curious about your comment that "I'm unlikely to do better than existing state-of-the-art schemes: what do you think you know about me that would lead you to make such a broad statement? Seems rather presumptuous on your part, no? Hello?
Jul
26
comment Secure way to store fixed size string of digits
@BradW: Yes, having gigabytes of easy storage gives you the luxury of being able to use random 256bit (or more) strings as unbreakable passwords.
Jul
25
comment Secure way to store fixed size string of digits
@BradW: Sorry Brad, you are right, I did not read all the comments, my bad.
Jul
23
comment Secure way to store fixed size string of digits
Store the information on a memory stick and keep the stick in your pocket until you need to enter it into your system.
Jul
10
awarded  Notable Question
Jul
2
awarded  Curious
May
2
awarded  Benefactor
Apr
26
accepted Nonlinearity of the J-K Flip Flop
Apr
26
comment Nonlinearity of the J-K Flip Flop
@grieu, Nice work, answer accepted. You are the "hardest working man in cryptography !
Apr
26
comment Nonlinearity of the J-K Flip Flop
@DW , Yes I am aware of how hard it is, but I like the challenge. But now that I am retired, its either design something new or watch "Gilligan's Island" re-runs. Oh, and by the way, if I were you, I wouldn't bet against me ;-)
Apr
25
comment Nonlinearity of the J-K Flip Flop
So let me ask this question: if the J-K flip flop was correlation-immune, it could be considered a strong cryptographic combining function?
Apr
25
comment Nonlinearity of the J-K Flip Flop
OK < thanks for the info, this is interesting. According to some papers I've read bent functions have to have an even number of variables, so according to your analysis, the flip flop can't have the same nonlinearity as the bent functions. I will wait for more answers here, hopefully someone will enlighten us.
Apr
24
awarded  Promoter
Apr
22
asked Nonlinearity of the J-K Flip Flop