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10h
comment How to choose McEliece's parameters?
It might be "what are the best known-results"; that'd certainly be an on-topic question.
11h
comment Question about keyed hash functions
Public key algorithms (such as signature and public key encryption, which you appear to be referring to) need to generate two keys, which are related (but not in an obvious way; at least, from the public key, you can't easily derive the private key); hence they need a procedure to generate those two keys. Symmetric algorithms (such as a keyed hash) only need one key, and are generally arranged so that an arbitrary bit string works (and hence there is no specific 'key generation' algorithm needed)
1d
comment rngtest results interpretation
I'm voting to close this question as off-topic because it's about explaining the output of the rngtest program, not about cryptography
1d
reviewed Close What are the advantages of using OFB (Output Feedback Mode)?
1d
comment What are the advantages of using OFB (Output Feedback Mode)?
What's your question? Whether it is, in fact, stronger than CFB?
1d
comment Question about keyed hash functions
Typically, one would expect a keyed hash function to take an arbitrary (possibly fixed length) binary string as the key; what that function does with the key is going to be awfully specific to the function.
2d
comment Parallel authentication of encrypted data. What AE type to choose?
Also, you state that the data channel speed is limited, but you need to handle huge messages. If you have a 100 TByte message, you need a 9 Gbps link to download it in a day (and I wouldn't call a 9 Gbps link limited). So, do you really need to be able to handle messags that large?
2d
answered Reasons for components of AES
2d
reviewed Reviewed Is a book cipher provably secure?
2d
comment Is a book cipher provably secure?
Of course, if the book cipher refers to words, you're stuck with the words found in the book. If you're book is French, that means that you're stuck with French vocabulary...
2d
reviewed Leave Open Using password-based encryption as a hashing scheme
2d
reviewed Leave Open I hashed my bag and in it I put… “Is there a hash for unordered items?”
2d
comment Meaning of pseudocode “$(C, S):=$”
@user3042720: if that answers the question, could you accept it (and possibly upvote it)? Thanks!
2d
answered Meaning of pseudocode “$(C, S):=$”
2d
comment Working on subgroup of $\mathbb{Z}^*_p$ in practice
To emphesize Henrick's point, different cryptosystems have different answers; in DH, we do want to stick to the subgroup; for SRP, we have to work with elements in the entire group
2d
comment Is format preserving encryption suitable for use with words or names?
@erotavlas: Typically, FPE functions deal with base 2 numbers (or, more generally, base $2^k$). So, what I would do is convert from base 52 into base 2, pass that base 2 number to the FPE function, and then take the base 2 number it gives you and convert it base into base 52.
Jul
3
comment The encryption scheme is secure?
And how do you decrypt it? Or, is how $k$ is generated also part of the key?
Jul
3
comment Is format preserving encryption suitable for use with words or names?
@erotavlas: integers are not inherently in particular base; they can be represented in any base. And yes, you can represent any integer in base 10, if you want; however I would question the utility of doing so in this case.
Jul
2
revised One-one correspondance complete function
added 14 characters in body
Jul
1
revised One-one correspondance complete function
Tried to be less obscure