phc-discussions - Question about saturating the memory bandwidth

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Message-ID: <CAJ7Lr3JyAqPr3sC8g-Rwje4BPL0i-1irP-QZ+u6rJacMHjJ-aw@mail.gmail.com>
Date: Fri, 17 Jan 2014 21:02:12 +0800
From: Ivica Nikolic <cube444@...glemail.com>
To: discussions@...sword-hashing.net
Subject: Question about saturating the memory bandwidth

Hi,

I have a question about a possible PHC design strategy:
Assume the defender is sitting on a GPU and his/her KDF saturates the
memory bandwidth. The look-up table used in the KDF is large and it does
not depend on the password. How can an attacker achieve a speed up?

Thanks.

Regards,
Ivica

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