On Thu, Jan 04, 2024 at 12:27:25PM +0100, Hannes Tschofenig wrote:
> 
> Brendan and I have submitted a draft that defines new header parameters
> to carry chains of CWTs.
> 
> 
> RFC 9360 defined header parameters to carry chains of X.509 certificates
> in COSE and this document applies the concept to CWTs. A CWT, when it
> contains the RFC 8747 cnf claim, behaves like a certificate. The
> functionality of this draft was extract from one of the SUIT working
> group documents. We believe that other applications will also need this
> feature.
> 
> 
> Here is the link to the document:
> 
> https://datatracker.ietf.org/doc/draft-tschofenig-cose-cwt-chain/

Some quick comments:

- Is there some claim that CWT is allowed to issue other CWTs (like the
  BasicConstraints CA flag in X.509)?

- I would have expected path validation to call that each CWT is signed
  by the key in confirmation of the previous CWT...




-Ilari

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