9,834 reputation
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bio website github.com/CodesInChaos
location Frankfurt, Germany
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visits member for 3 years, 3 months
seen 30 mins ago

Mar
26
reviewed Approve suggested edit on What is the probability of breaking the AES algorithm?
Mar
24
reviewed Approve suggested edit on Export from US of crypto software with key-size > 56 bits still needs permission?
Mar
23
comment Can SRP be used with Elliptic Curves?
It's certainly possible to use a protocol that generates a private key from a password hash with ECC. But the proof that the client possesses the key will be different.
Mar
23
revised How to efficiently generate a stream of independent, but biased random bits?
added 50 characters in body
Mar
23
reviewed Approve suggested edit on reduces the coefficients of a modulo 3 on NTRU
Mar
21
comment RSA Certificate Owner and Issuer line meanings?
Look for X500 and X.509
Mar
20
comment Security of Deterministic Encryption Scheme
Pretty much the only inherent issue with deterministic encryption is that it leaks if two inputs are identical. So if you apply it to individual words, security will suck. If you apply it to complete and complex files, you'll probably be OK.
Mar
20
comment Sensible usecase for restricting special characters in passwords?
Some keyboards lack some characters, and outside ASCII you'll need to be careful about encoding.
Mar
20
comment Even passwords are vulnerable to hash collision attacks?
The adversary can inject material (though the salt might block any collision attack). But such a collision attack at best(from his point of view) allows the attacker to create an account for which he knows two different passwords. Not very useful...
Mar
20
comment How does the rand() function in C work?
Even when eyeballing the plot of rand() it often exhibits total failure
Mar
20
comment How does the rand() function in C work?
Given the typical implementation of rand(), you're using a quite generous definition of "works". IMO it does not work, even for non security related stuff.
Mar
19
comment Brute forcing an HMAC
If it's a proper key (128 random bits) then it's completely infeasible. If the key is derived from a password, it depends on the password and the derivation function. But in that case you don't attack HMAC, you attack the password.
Mar
19
comment Encryption with Deduplication
This is known as convergent encryption. Unless your question has any aspects not covered by that question, we could close it as a duplicate ;)
Mar
18
reviewed Approve suggested edit on computing inverses in truncated polynomial rings manually for NTRU encryption
Mar
18
reviewed Approve suggested edit on When confusion is applied during encryption?
Mar
18
reviewed Approve suggested edit on Where to store the private key and the public key in a communication protocol
Mar
18
comment Efficient algorithm for remainder calculation over prime field for ECC implementation?
@venkat Primes in ECC are often specifically chosen so they allow more efficient reductions.
Mar
18
revised Efficient algorithm for remainder calculation over prime field for ECC implementation?
added 6 characters in body
Mar
18
comment Export from US of crypto software with key-size > 56 bits still needs permission?
You often need to register your software, but as long as you don't export to a couple of blacklisted states, that's mostly a formality. For open source software the rules are even more relaxed. So effectively it's just a bit of bureaucracy thrown at you.
Mar
18
awarded  Fanatic