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Re: [Anima] [Rats] cose+cbor vs cwt in MIME types

Michael Richardson <mcr+ietf@sandelman.ca> Thu, 23 March 2023 18:44 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Thomas Fossati <Thomas.Fossati@arm.com>, Thomas Fossati <tho.ietf@gmail.com>, "cose@ietf.org" <cose@ietf.org>, "rats@ietf.org" <rats@ietf.org>, "anima@ietf.org" <anima@ietf.org>
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Date: Thu, 23 Mar 2023 14:44:02 -0400
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Subject: Re: [Anima] [Rats] cose+cbor vs cwt in MIME types
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COSE CHAIRS: can we have 5 minutes for this discussion?
     I guess I can make two slides tomorrow and get Thomas to co-author them.


Thomas Fossati <Thomas.Fossati@arm.com> wrote:
    > On 13/03/2023, 18:10, "Thomas Fossati" tho.ietf@gmail.com<mailto:tho.ietf@gmail.com> wrote:
    >>
    >> On Mon, Mar 13, 2023 at 5:49 PM Michael Richardson
    >> mcr+ietf@sandelman.ca<mailto:mcr+ietf@sandelman.ca> wrote:
    >> > Thomas Fossati Thomas.Fossati@arm.com<mailto:Thomas.Fossati@arm.com> wrote:
    >> >     > I have commented on your respective issue trackers.
    >> >
    >> > I saw, but I think that this requires some cross-WG discussion and consensus,
    >> > and I think that the COSE WG should tell us what to do.
    >>
    >> Sure, thank you for bringing COSE in the loop.

    > I just realised this needed some follow-up from my side.

    > What MCR is talking about is the eat-media-type [1] draft we are doing
    > in RATS.  The document requests registration of the +cwt structured
    > syntax suffix (see Section 6.1).

    > The idea is to use +cwt to indicate that the media type is encoded as a
    > CWT, symmetric to +jwt.

    > In our case we'd be using it in composition with application/eat to
    > differentiate between the JWT and CWT serialisations of EAT.

    > COSE is the natural stakeholders for this, so if you could have a look
    > and see if we are doing the right thing it'd be awesome.

And, if ANIMA should also be using +CWT for what is now RFC8366bis
(and used to be in the constrained-voucher document), or if our use of
application/voucher-cose+cbor is wrong.

(DAMN. It's not in rfc8366bis yet. It should be)


--
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide

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