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Date: Tue, 21 Jul 2015 12:24:00 -0700
From: Bill Cox <>
To: "" <>
Subject: Re: [PHC] Argon2 improvement thread

On Tue, Jul 21, 2015 at 12:39 AM, Jean-Philippe Aumasson <> wrote:

> Solar Designer proposed to integrate MAXFORM in Argon2d.

> Bill Cox proposed (in his yesterday's email):

> - Improved GPU resistance, similar to Yescrypt"
> If Alexander proposed to integrate his PWXFORM (I don't know what MAXFORM
is), then I would be for it.  This would satisfy my request for improved
GPU resistance, and also my request for multiplication-chain computation
time hardening.

There are only two really outstanding SIMD-optimized mixing functions which
were used in this competition, IMO.  The choices are the reduced-Blake2
with or without it's multiplication modification, and PWXFORM.  I suspect
between Samuel Neves, Alexander, and the Argon2 team, they could figure out
the best solution.


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