5
votes
1answer
98 views

Security of KDF1 and KDF2 (hash based KDF's)

It's still common to come across implementations of KDF1 and KDF2. Basically these are KDF's that simply derive multiple keys from the key seed and a counter: $K_i = KDF(K_{master}, i) = H(K_{master} ...
-1
votes
0answers
40 views

Does repeated hashing create a PRF?

Say you start with a seed value and hash it with a secure hashing algorithm, then hash the output of that and so on... Is this a PRF? Or does it have a certain computable period?
1
vote
3answers
405 views

Hash function based on pseudorandom functions and security

Are there hash functions that make use of pseudorandom functions. Precisely, I'm looking for a specification of a hash function based on PRF (and based on the security of such a primitive).