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Date: Thu, 09 Jan 2014 10:56:25 +0100
From: Christian Forler <>
Subject: Re: [PHC] What's your favorite entry so far, and why?

On 09.01.2014 04:07, Bill Cox wrote:

> From a theoretical point of view, Catena wins so far.  Avoiding cache
> timing attacks is desirable, and Catena shows how to do it.  I am
> concerned that the authors recommend only 10-ish MB of memory, when
> escrypt can hash 1GB in a second.  Protection in memory-hard KDFs is
> proportional to memory used!  While I'm a fan of the algorithm, if
> Catena were more speed competitive, I would consider it a stronger
> candidate.

Do you really want to allocate 1GB of RAM on a tablet or smartphone to
perform the login process? A lot of those devices have less then
1GB of RAM. In general I'm not convinced that a significant amount of
useres/admins are not pleased with a login process that
allocates a huge amount of the systems RAM. On many host, such a
solution will virtually enforce swapping. Just saying. :-)

We designed Catena to run smoothly on (almost) any modern computer
without causing extra pain for regular users/admins.

Best regards,

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