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
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Feb
8
comment Hashing a password with SHA256 on the client then bcrypt on the server
Do it the other way round. Bcrypt on the client, and SHA-256 on the server
Feb
8
comment Request for 1024-bit primes $p$ , subgroup $q$ and subgroup generator $g$
What do you want to use those for? The requirements for those differ subtly with use. For example ElGamal signatures need a large generator. For most uses I'd just look up a set of group parameters in a DSA or DH standard.
Feb
8
comment AES implementation in java that allows key of 320-bit length
cross-posted
Feb
8
comment AES implementation in java that allows key of 320-bit length
Why do you want 320 bit keys? 256 is already more than enough. If it's because your key material is that large, just hash it with SHA-256 to get a 256 bit key.
Feb
8
answered What is 'security margin'?
Feb
7
comment Source for examples with broken cryptography
That attack of A5/3 is a related key attack. So unless you're using a really weird protocol, it's not relevant in practice. Just like related key attacks against AES are pretty irrelevant.
Feb
7
reviewed Satisfactory Does RSA-OEAP have integrity and authenticity properties?
Feb
7
reviewed Satisfactory FIPS 140 compliance for encrypted files
Feb
7
reviewed Satisfactory Two step encryption
Feb
7
reviewed Excellent A situation where security by obscurity might be the best solution - or am I wrong?
Feb
7
reviewed Satisfactory Deriving Keys for Symmetric Encryption and Authentication
Feb
7
awarded  Custodian
Feb
7
reviewed Excellent Future-Proof Versioning and Validation
Feb
7
reviewed Excellent On-the-fly computation of AES Round Keys for decryption?
Feb
7
comment Why programming languages don't provide simple encryption methods?
@EthanHeilman Look at some encryption questions/answers on stackoverflow. Most of them have huge holes, such as no authentication(hello padding oracle) or constant IVs.
Feb
7
awarded  Enlightened
Feb
7
reviewed Reject suggested edit on Are there two known strings which have the same MD5 hash value?
Feb
7
awarded  Nice Answer
Feb
6
comment Guarding against cryptanalytic breakthroughs: combining multiple hash functions
But this question isn't really about H(H(x)) with H being the same hash in both cases.
Feb
6
revised Guarding against cryptanalytic breakthroughs: combining multiple hash functions
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