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visits member for 11 months
seen Jul 16 at 15:35

Jun
2
comment Parallel hash construction
@user1028028: PMAC without key is completely insecure. Fix it, how?
Jun
1
comment Parallel hash construction
@user1028028: I'm asking about hash, not MAC.
May
31
accepted Parallel hash construction
May
31
revised Parallel hash construction
equations fixed
May
31
asked Parallel hash construction
May
19
awarded  Commentator
May
19
comment Pseudo-Hadamard transform, most significant bit
@poncho: Sorry, my mistake. It doesn't.
May
17
comment Pseudo-Hadamard transform, most significant bit
$b = b' \oplus a' \, \pmod{2^n}$ $a = (a' \oplus b') - b' \, \pmod{2^n}$
May
17
comment Pseudo-Hadamard transform, most significant bit
I don't think this is a problem. However you could improve it by doing: $a' = a + b \, \pmod{2^n}$ $b' = (a + b) ⊕ b\, \pmod{2^n}$ This would also add some non-linearity.
May
15
comment Is TEA considered secure?
Attack with time complexity of $2^{121.5}$ is on 21 of recommended 64 rounds.
Mar
2
comment GCM vs CTR+HMAC tradeoffs
Yes, CTR can be processed in parallel, but most hash functions can't process in parallel. While GCM is fully parallel.
Mar
1
answered GCM vs CTR+HMAC tradeoffs
Feb
5
awarded  Teacher
Dec
24
accepted How would using only one s-box affect security of Blowfish?
Dec
22
revised How would using only one s-box affect security of Blowfish?
edited body
Dec
21
answered How would using only one s-box affect security of Blowfish?
Dec
16
asked How would using only one s-box affect security of Blowfish?
Dec
12
awarded  Supporter
Dec
9
accepted Does SpongeWrap (from the Keccak team) absorb ciphertext or plaintext?
Dec
9
awarded  Editor