[media-types] Re: new parameter value for application/cose-x 509

On Sun, 5 Oct 2025 at 16:36, Harald Alvestrand <[email protected]> wrote:
>
> On 10/4/25 19:40, Thomas Fossati wrote:
> > Hi, media types experts,
> >
> > We would like to extend the "usage" parameter of the
> > application/cose-x509 [1] to include the value "dice-chain" [2], in
> > addition to the existing "chain".
> >
> > We have approached the COSE WG, where the media type was originally
> > defined, and they advised us to send the updated template to this
> > list.
>
> Formalities answer:
>
> For current procedures, check RFC 6838 section 5.5, which says "The same
> procedure that would be appropriate for the original registration
> request is used to process a change request."
>
> In the case of "application/cose-x509",
> https://www.iana.org/assignments/media-types/application/cose-x509 shows
> that the change controller is the IESG, and the standards process needs
> to process it.
>
> Sending the updated registration template here is a good first step, per
> section 5.1, but eventually you need to get IESG approval on the change.
> Whether you need to publish an update to RFC 9360 or an additional RFC
> is probably going to be decided by the WG, your AD, and the IESG.

Thank you very much for your guidance, Harald.
I am going back to COSE to discuss how to move forward.

> But sending the updated template here for review is a good first step.
> Do that.

Sure, I'll do that as soon sa possible. Perhaps along with a document
explaining the semantics in more detail.

cheers, t

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