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Date: Mon, 19 Oct 2015 11:52:49 -0700
From: Bill Cox <>
To: "" <>
Subject: Re: [PHC] Re: BlaMka loses entropy

On Mon, Oct 19, 2015 at 11:45 AM, Dmitry Khovratovich <> wrote:

> Even if you were right, this property would not be a problem thanks to the
> 8192-bit width of permutation P. It would be highly unlikely that any of
> 2^256 possible Argon2 executions collide due to such property.

Probably true, but it does make the security proof simpler.  It's nice to
know exactly which step(s) results in entropy loss.  I just proved to
myself that BlaMka does not loose entropy.  It's a nice property to have in
the inner hashing function.


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