phc-discussions - Re: [PHC] Argon2 improvement thread

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Message-ID: <CAOLP8p48n=-B3E=q+fQgk+W+u8JiE=awi2XEcvbJCib2ePH32A@mail.gmail.com>
Date: Tue, 21 Jul 2015 12:24:00 -0700
From: Bill Cox <waywardgeek@...il.com>
To: "discussions@...sword-hashing.net" <discussions@...sword-hashing.net>
Subject: Re: [PHC] Argon2 improvement thread

On Tue, Jul 21, 2015 at 12:39 AM, Jean-Philippe Aumasson <
jeanphilippe.aumasson@...il.com> 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.

Thanks,
Bill

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