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seen Jul 20 at 14:36

Oct
21
comment Key derivation from a random seed
In case I would like to use a hash function like say SHA-1 to produce a random 256 bits. SHA-1 has 160 bits digests. Is it ok if I start with a random sentence say "10-39-298*&*^&^90" has it many times and collect that last 256 bits?
Oct
21
comment Key derivation from a random seed
I would like to use this way to see how random the key derived can be. Its not a new construction is something which is very common if a hash function is used instead of a cipher.
Oct
20
accepted Key derivation from a random seed
Oct
19
asked Key derivation from a random seed
Oct
17
awarded  Scholar
Oct
17
accepted Conditional entropy
Oct
17
asked Conditional entropy
Sep
16
awarded  Student
Sep
16
asked Dimension of Encryption of a linearly dependent set of plaintexts