Re: [Curdle] Which curves are MUST and SHOULD ?

Daniel Migault <mglt.ietf@gmail.com> Wed, 02 December 2020 02:37 UTC

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From: Daniel Migault <mglt.ietf@gmail.com>
Date: Tue, 1 Dec 2020 21:37:43 -0500
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To: Simo Sorce <simo@redhat.com>
Cc: "Salz, Rich" <rsalz=40akamai.com@dmarc.ietf.org>, "Mark D. Baushke" <mdb=40juniper.net@dmarc.ietf.org>, "curdle@ietf.org" <curdle@ietf.org>
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Subject: Re: [Curdle] Which curves are MUST and SHOULD ?
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I think the reason for SHOULD is to let time for implementations to
integrate it, but since that is already the case I agree we can have it to
MUST. This also aligns with recommended modern TLS profile from mozilla.
Yours,
Daniel

On Tue, Dec 1, 2020 at 1:58 PM Simo Sorce <simo@redhat.com> wrote:

> On Tue, 2020-12-01 at 16:38 +0000, Salz, Rich wrote:
> > >    PS: Note I have NOT uploaded the -13 edition of the document pending
> >     feedback/consensus on the ecdh-sha2-nistp{256,384,512} being SHOULD
> >     instead of MUST. I would be more likely to want curve25519-sha256 to
> be
> >     a MUST rather than SHOULD than the nistp curves be a MUST... mostly
> due
> >     to personal bias.
> >
> > Pulling this topic into a separate thread.
> >
> > If you have opinions on NIST and X25519, please speak up now.
>
> I do not personally have any bias toward NIST vs x25519 curves, but in
> practice the x25519 curve should be a MUST because it is the most
> widely deployed, while the NIST curves should be a SHOULD because of
> wide adoption in FIPS environments.
>
> Simo.
>
> --
> Simo Sorce
> RHEL Crypto Team
> Red Hat, Inc
>
>
>
>
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-- 
Daniel Migault
Ericsson