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Re: [Cfrg] draft-ladd-safecurves-02

Watson Ladd <watsonbladd@gmail.com> Fri, 10 January 2014 23:31 UTC

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Date: Fri, 10 Jan 2014 15:31:15 -0800
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From: Watson Ladd <watsonbladd@gmail.com>
To: Alyssa Rowan <akr@akr.io>
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Subject: Re: [Cfrg] draft-ladd-safecurves-02
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On Fri, Jan 10, 2014 at 11:48 AM, Alyssa Rowan <akr@akr.io> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
>
> On 10/01/2014 19:11, Watson Ladd wrote:
>
>> Added: explicit formulas and a point format (big endian with a bit
>> for the missing coordinate).
>
> Fair enough. (Cofactors were also added, by the way.)
>
>> The name is now the Chicago curves.
>
> As good as any other.
>
> Comments:
> • Typo in end of section one: Weierstrass, not Weierstrauss.

Fixed

> • I think it'd be a little more helpful if section 2 were split into
>   two sections: the Montgomery curves, and the Edwards curves. That'd
>   make it much more apparent which curves are applicable to which
>   sections in 3 and 4.

I'll think about a clean way to do this. Of course, you can use
isogenies to convert
between all of these forms.

> • Pretty please can we have Curve1174 as well?

Included.

Anymore suggestions? This next one it would be nice to get Last Call on.
>
> Other than that, no more comments.
>
> E-521's passed all tests, by the way, as expected (and it seems was
> obviously rigid enough that three groups actually came up with the
> exact same curve!).
>
> I see no particular reason to hold this up.
>
> - --
> /akr
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