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Re: [Cfrg] Elliptic Curves - poll on security levels (ends on February 17th)

Eric Rescorla <ekr@rtfm.com> Wed, 11 February 2015 18:25 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Wed, 11 Feb 2015 10:24:13 -0800
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To: Alexey Melnikov <alexey.melnikov@isode.com>
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Subject: Re: [Cfrg] Elliptic Curves - poll on security levels (ends on February 17th)
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On Tue, Feb 10, 2015 at 2:52 AM, Alexey Melnikov <alexey.melnikov@isode.com>
wrote:

> CFRG chairs are starting a poll, containing 2 initial questions:
>
> Q1: Should CFRG recommend a curve at the 192-bit security level?
>
> Q2: Should CFRG recommend a curve at the 256-bit security level?
>
> Answering Yes/No to each of these would suffice.


Sorry for giving an unclear answer, but:

I believe that the CFRG should probably specify one stronger curve at
either 192 or 256.
Both of these seem to have arguments in favor, but if I were pushed I would
probably
go for 256 for the reason that if we're going to be conservative we should
be really
conservative.

-Ekr



>
Once this first set of issues is resolved, we will move to choices of prime
> at the selected security level(s), if any. After that we will be
> discussing implementation specifics and coordinate systems for
> Diffie-Hellman. We will then make decisions on signature schemes.
> Please don't discuss any of these future topics at this time.
>
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