Hello, I have reviewed the registration request for draft-ietf-cose-cwt-claims-in-headers-07 as a Designated Expert for the "COSE Header Parameters" registry https://www.iana.org/assignments/cose/cose.xhtml#header-parameters. I have not consulted with the other expert, so Carsten, if you have any opinion please go ahead.
I have a major issue with this registration: this is basically a duplicate of an existing registration, called "kccs". "kccs" is described as follows: > A CWT Claims Set (CCS) containing a COSE_Key in a 'cnf' claim and possibly > other claims. CCS is defined in [RFC8392]. If my understanding is correct, this is almost exactly what draft-ietf-cose-cwt-claims-in-headers wants, with the exception that draft-ietf-cose-cwt-claims-in-headers doesn't give any specification about which claims are included. I believe registering another parameter, as requested by draft-ietf-cose-cwt-claims-in-headers, goes against the guidance given by the Expert Review Instructions of RFC 9052, Section 11.6: > Reviewers are encouraged to get sufficient information for registration > requests to ensure that the usage is not going to duplicate an existing > registration I note that "kccs" is registered by the EDHOC document in lake: https://datatracker.ietf.org/doc/draft-ietf-lake-edhoc/ which is not yet published (it is however in EDIT state in the RFC Editor queue). I suggest that that document's COSE Header Parameter is changed so that the description is more general and cover this case as well. This could be done by a small change of the name "kccs" to "ccs" and the following change in the description: OLD A CWT Claims Set (CCS) containing a COSE_Key in a 'cnf' claim and possibly other claims. CCS is defined in [RFC8392]. NEW A CWT Claims Set (CCS) as defined in [RFC8392]. (And if that is done, I suggest the same modification is done for "kcwt"). Then draft-ietf-cose-cwt-claims-in-headers would not need to be published at all. Francesca From: David Dong via RT <[email protected]> Date: Tuesday, 17 October 2023 at 20:45 To: Cc: Francesca Palombini <[email protected]>, [email protected] <[email protected]>, [email protected] <[email protected]> Subject: [IANA #1284212] expert review for draft-ietf-cose-cwt-claims-in-headers (cose) Dear Francesca Palombini and Carsten Bormann (cc: cose WG), As the designated experts for the COSE Header Parameters registry, can you review the proposed registration in draft-ietf-cose-cwt-claims-in-headers-06 for us? Please see: https://datatracker.ietf.org/doc/draft-ietf-cose-cwt-claims-in-headers/ The due date is October 31st. If this is OK, when the IESG approves the document for publication, we'll make the registration at: https://www.iana.org/assignments/cose/ Unless you ask us to wait for the other reviewers, we’ll act on the first response we receive. With thanks, David Dong IANA Services Sr. Specialist
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