phc-discussions - Re: Re: Re: Re: Re: Re: Second factor (was A review per day

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Date: Wed, 10 Sep 2014 22:47:31 -0700
From: Alex Elsayed <eternaleye@...il.com>
To: discussions@...sword-hashing.net
Subject: Re: Re: Re: Re: Re: Re: Second factor (was A review per day - Schvrch)

Alex Elsayed wrote:

Augh, just realized I screwed up here:

> Given token T holding secret X, user U holding password P, and server S:
> U -> T: H(P)
> T -> U: Y = E(k=X, H(P))
> T -> S: R_t = PAKE(X)
> U -> S: R_u = PAKE(E(k=Y,P))
# Still need to latch P rather than H(P)
U -> S: R_u = PAKE(E(k=Y,P))
> T -> U: R_t
> U: K = R_t ^ R_u

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