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I am a math/computer nerd. Nothing to see here, move along.


Oct
27
comment Cryptographic Dilemma
We still need more context. What are H, K, M, and C? And something seems off; on the left-hand side of the equation, H appears to be a function that takes two arguments, whereas on the right-hand side it takes only one.
Oct
26
reviewed Close Decrypting monoalphabetic substitution key which does not appear in ciphertext
Oct
26
reviewed Close How to find secret key and public key for ECC cryptosystem?
Oct
26
reviewed Close General strategy for proving security of a scheme
Oct
26
reviewed Close Does the size of a SSH ECDSA key determine the hash algorithm?
Oct
24
reviewed Looks OK How to compute 3P from elliptic curve where P is (28, 8)
Oct
24
reviewed Reviewed Smart card minidriver: CryptAcquireContext failed with error 0x80090016 (NTE_BAD_KEYSET)
Oct
21
reviewed Close What does “learnable with oracle queries” mean?
Oct
14
reviewed Close How to use the key from a Diffie Hellman exchange?
Oct
14
comment Key management protocol for end-to-end security on Advanced Metering Infrastructure
This is a bit of a tangent, but if you're interested in learning about what some more sophisticated crypto can do in the specific context of smart meters, you might want to read up on work by George Danezis et al., e.g., www0.cs.ucl.ac.uk/staff/G.Danezis/papers/DFKZSEGS13.pdf.
Oct
12
reviewed Leave Open Block Cipher Modes
Oct
6
reviewed No Action Needed Session based AES with random key and static salt
Oct
5
reviewed Close Witness and Commitment in Commitment schemes
Oct
3
awarded  Student
Oct
3
revised Has there been any cryptanalysis of AES under a non-uniformly distributed key?
added 142 characters in body
Oct
3
comment Has there been any cryptanalysis of AES under a non-uniformly distributed key?
@owlstead This is not my area, but it seems to me that key scheduling attacks would be well in-scope here. For example, consider generating an AES-256 key by appending 178 zeros (or whatever) to a uniformly random 80-bit string. The result would (arguably) have enough entropy to be border-line secure against brute-force attacks, but it's my understanding that the key scheduler wasn't designed to handle this level of abuse.
Oct
3
comment Has there been any cryptanalysis of AES under a non-uniformly distributed key?
@TravisMayberry I was using the term "uniform distribution" in the technical sense, i.e., all keys are equally likely. The standard PRP security definition assumes this property of the blockcipher key, and I was wondering if anyone had looked at the question of what happens when this assumption is violated (aside from related key attacks).
Oct
2
reviewed Close How does Blowfish avoid successful cryptanalysis?
Oct
2
reviewed Close What is the translation for “hash” in french?
Oct
2
asked Has there been any cryptanalysis of AES under a non-uniformly distributed key?