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bio website crypto.stackexchange.com/…
location United States
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visits member for 2 years, 2 months
seen Oct 23 at 21:47


Jan
6
reviewed Approve suggested edit on How does Clifford Cocks 'Non-Secret Encryption' work?
Jan
4
reviewed Leave Open What is the most secure hand cipher?
Jan
2
awarded  Custodian
Jan
2
reviewed Leave Open Significance of repetition in XOR cipher text
Dec
30
awarded  Citizen Patrol
Dec
28
answered Should I bother implementing DH + AES, or leave it to a library like Crypto++
Dec
26
reviewed Needs Improvement Why send a challenge with CHAP?
Dec
26
awarded  Custodian
Dec
26
reviewed Excellent Diffie-Hellman Secret Exponent Size and Shared Secret Usage
Dec
26
reviewed Excellent Are there any differences in operation between existing Diffie-Hellman specifications?
Dec
26
reviewed Excellent Why is sharing the seed and using SecureRandom “deterministically” so bad?
Dec
13
comment Testing a steganalysis technique on realistic data
This isn't a cryptography question. Perhaps security.stackexchange.com?
Dec
12
comment Certificateless cryptography
@Ravi, if you are simply talking about a two user system, it's possible for the two users to meet and simply exchange public keys; or they could even exchange a secret key and skip all the public key work. In this case, the two parties establish and validate their identities independent of the cryptography; from there, continued possession of the other's key serves as your authentication. In general, public key cryptography looks for ways to avoid establishing individual trust connections, in order to minimize cost or maximize flexibility. But that means all parties must trust a third party.
Dec
12
comment Do test vectors ensure a cipher is free of backdoors?
@TruthSerum, GOST doesn't specify the contents of the S-Boxes, so each implementation can choose their own set. I don't know if it's true that the Soviets deliberately assigned weak S-boxes as pg1989 claimed, but it is known that certain choices for S-boxes can result in a very weak cipher. See en.wikipedia.org/wiki/GOST
Dec
12
revised Do test vectors ensure a cipher is free of backdoors?
added 22 characters in body
Dec
11
answered Do test vectors ensure a cipher is free of backdoors?
Nov
19
answered Why not just generate random strings for one-time password (OTP)?
Nov
17
comment Can you break a multi language code using Frequency analysis?
Averaging the letter frequencies of each combination of three languages should also yield a series of unique profiles. But to actually make use of them will require a large amount of ciphertext written in the same manner as sources from which the frequency tables were generated. It's not impossible, it will just take 364 times more ciphertext than a single language (number of combinations of 3 of 14 languages).
Nov
14
answered what is the state of the art algorithm to encrypt credit card data
Nov
13
answered Is there a proof for showing any cryptogram is crackable?