[Cfrg] Algebraic Eraser - cryptanalysis

"Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk> Fri, 13 November 2015 10:07 UTC

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From: "Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk>
To: "cfrg@irtf.org" <cfrg@irtf.org>
Thread-Topic: Algebraic Eraser - cryptanalysis
Thread-Index: AQHRHfshCMiZi/1dk0utvG/dUbNNNg==
Date: Fri, 13 Nov 2015 10:07:40 +0000
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Subject: [Cfrg] Algebraic Eraser - cryptanalysis
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Dear CFRG,

Some of you may recall that we had a presentation from the SecureRF team
on the Algebraic Eraser key agreement protocol at the Dallas meeting back
in March this year (slides here:
https://www.ietf.org/proceedings/92/slides/slides-92-cfrg-2.pdf). Some
discussion followed on the list:

https://www.ietf.org/mail-archive/web/cfrg/current/msg06565.html


My colleague Simon Blackburn and his collaborators have just published an
attack on the Algebraic Eraser scheme, breaking the scheme at the
designers' claimed 128-bit security level. Their attack recovers the
shared key using 8 CPU hours and 64MB of memory. Their paper is here:

http://arxiv.org/abs/1511.03870

Regards,

Kenny