|visits||member for||9 months|
|seen||Jun 12 '13 at 11:54|
Password checking algorithm
No, I know that $f$ is a cryptographic hash function e.g. sha1, and I'm sure that Alice can calculate X, but she doesn't know b and Bob doesn't send value of X he sends $f(X)$. I think $X = f_1(K,password)$ where K is the shared secret between Alice and Bob. They both know K and password, so there must be an expression equivalent to X on the Alice's side.
|asked||Password checking algorithm|