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visits member for 1 year, 10 months
seen Sep 17 at 9:46

Sep
10
awarded  Curious
Sep
10
revised Are there cryptographic hash functions with homomorphic properties?
added 7 characters in body; edited title
Sep
10
asked Are there cryptographic hash functions with homomorphic properties?
Apr
26
comment Tiger Tree Hash vs generic Merkle Tree
I have clarified my question.
Apr
26
revised Tiger Tree Hash vs generic Merkle Tree
added 112 characters in body; edited title
Apr
26
asked Tiger Tree Hash vs generic Merkle Tree
Mar
29
accepted Cryptographic system with double keys with reversible order
Mar
29
awarded  Commentator
Mar
29
comment Cryptographic system with double keys with reversible order
Thank you for your answer! Could you provide any papers on the protocol you've described? Like, if it's secure, why isn't it widespread?
Mar
29
comment Generating shared secret random permutation
Thank you very much for your help! One last question — am I free to split value into left and right halves arbitrarily, or swap left and right halves? If yes, can I just select arbitrary bitmask and do something like (left_half & mask) + ((right_half & ~mask) * seed)?
Mar
28
comment Generating shared secret random permutation
and if doing left_half + (right_half * seed), is it really enough? E.g. isn't that too simple? And what size of finite field should I use? Sorry for dumb questions.
Mar
28
comment Generating shared secret random permutation
well... did I understand you correctly that using cryptographic hash function will also work, but it's just less efficient compared to pure GF math? I'm afraid I'll horribly fail with implementing it myself, just because I know nothing about this field of math, and that's why I'd prefer at least use widely known algorithm.
Mar
28
comment Generating shared secret random permutation
I've read your answer several times, and now I hope I mostly understood it. To your opinion, is Extract(value, seed) := SHA256(seed:value) with seed being at least 512 bit, applicable?
Mar
28
accepted Generating shared secret random permutation
Mar
28
asked Cryptographic system with double keys with reversible order
Mar
28
asked Generating shared secret random permutation
Mar
22
accepted Rock-paper-scissors over network, how to protect from cheating server?
Mar
22
asked Rock-paper-scissors over network, how to protect from cheating server?
Jun
10
accepted Is symmetric key encrypted with server's public key secure
Jun
10
comment Is symmetric key encrypted with server's public key secure
Thank you for full and comprehensive answer!