Re: [Cfrg] revised requirements for new curves

David Jacobson <dmjacobson@sbcglobal.net> Mon, 08 September 2014 15:46 UTC

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Date: Mon, 08 Sep 2014 08:46:02 -0700
From: David Jacobson <dmjacobson@sbcglobal.net>
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To: "Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk>, "cfrg@irtf.org" <cfrg@irtf.org>
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Archived-At: http://mailarchive.ietf.org/arch/msg/cfrg/lm2LqZ1WWWfE_89alJsHM2mXo18
Subject: Re: [Cfrg] revised requirements for new curves
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On 9/8/14 3:23 AM, Paterson, Kenny wrote:
> SE6. Required: the selected curves should provide levels of security that
> match to a good approximation 128-bit, 192-bit and 256-bit security
> levels, as these levels are currently commonly understood in the wider
> security community. [NC]
>
I think you need to make it clear that "good approximation" is rather 
loose.  The point is to make Curve 25519 be considered an approximately 
256 bit curve.

    --David Jacobson