Re: [Ace] How to specify DTLS MTI in COAP-EST

Michael Richardson <mcr+ietf@sandelman.ca> Thu, 07 June 2018 17:41 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Hannes Tschofenig <Hannes.Tschofenig@arm.com>, "ace\@ietf.org" <ace@ietf.org>
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Date: Thu, 07 Jun 2018 13:41:17 -0400
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Subject: Re: [Ace] How to specify DTLS MTI in COAP-EST
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Hannes Tschofenig <Hannes.Tschofenig@arm.com>; wrote:
    > why don't you just reference https://tools.ietf.org/html/rfc7925?

Ignorance :-)
Thank you, I think that we will reference it then;

Section 4.4 includes:

	At the time of writing, the
        recommended curve is secp256r1, and the use of uncompressed points
        follows the recommendation in CoAP.  Note that standardization for
        Curve25519 (for ECDHE) is ongoing (see [RFC7748]), and support for
        this curve will likely be required in the future.

which is what we want to say anyway.

    > I am not a big fan of making all sorts of different crypto
    > recommendations in our specs that differ slightly. 

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