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Re: [Cfrg] I-D Action: draft-irtf-cfrg-hash-to-curve-04.txt

Björn Haase <bjoern.m.haase@web.de> Mon, 22 July 2019 21:25 UTC

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To: "Riad S. Wahby" <rsw@jfet.org>, cfrg@irtf.org
References: <46863a4d-e193-1697-058d-2c14106c317e@web.de> <84012971-70cd-da2d-55b7-944635c92b65@web.de> <F5C22BE6-7E24-43E8-B023-A5FF0A5EA960@jfet.org>
From: Björn Haase <bjoern.m.haase@web.de>
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Date: Mon, 22 Jul 2019 23:25:50 +0200
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Subject: Re: [Cfrg] I-D Action: draft-irtf-cfrg-hash-to-curve-04.txt
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Dear Riad,

> So: if P256 ends up using Simplified SWU, P384 can as well.

Yes. Sorry for the confusion. I thought that the simplified SWU did not
work for P384. Anyway I'd clearly would like to advocate for a per-curve
mapping algorithm standard. This would any way apply to Edwards and
Montgomery curves. If we could uniformly use simplfied SWU on most
short-Weierstrass curves, I believe that this would be fine.

Yours,

Björn.

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