Hi Hannes, < https://datatracker.ietf.org/doc/html/draft-ietf-suit-firmware-encryption-13#name-example > This could be a use case. Currently we set the fixed value 'kid-1' to one recipients as an example, but there could be multiple recipients and multiple symmetric KEKs. A recipient Device may easily select the appropriate key and inner recipient structre to decrypt the payload.
Best, Ken 2023年7月27日(木) 17:13 Tschofenig, Hannes <hannes.tschofenig= [email protected]>: > Hi Mike > > > > I can understand the desire to create alignment with RFC 7638 since the > symmetric key thumbprint functionality is also supported there. > > It might nevertheless be good to state the use case in the draft and I > couldn’t follow Brendan’s explanation during the meeting. He had some use > case for TEEP or SUIT in mind. > > > > Ciao > > Hannes > > > > > > *Von:* Michael Jones <[email protected]> > *Gesendet:* Donnerstag, 27. Juli 2023 17:10 > *An:* Tschofenig, Hannes (T CST SEA-DE) <[email protected]>; > [email protected]; [email protected] > *Cc:* cose <[email protected]> > *Betreff:* RE: draft-ietf-cose-key-thumbprint-00.txt > > > > [chair hat off] > > > > I would suggest supporting symmetric key thumbprints, so as to be parallel > with JWK Thumbprint, which does so at > https://www.rfc-editor.org/rfc/rfc7638.html#section-3.2. > > > > -- Mike > > > > *From:* COSE <[email protected]> *On Behalf Of *Tschofenig, Hannes > *Sent:* Thursday, July 27, 2023 4:54 PM > *To:* [email protected]; [email protected] > *Cc:* cose <[email protected]> > *Subject:* [COSE] draft-ietf-cose-key-thumbprint-00.txt > > > > We have submitted the -00 version of the COSE Key Thumbprint draft. > > > > At the meeting John and Brendan raised two additional requirements, namely > > > > - Support for thumbprints of symmetric keys, > - Support for thumbprints of CWT Claims Sets and CBOR Web Tokens > > > > Due to lack of time at the COSE session it was not possible to go into the > details about those two requirements. > > > > @John+@Brendan: Could you give us more context? > > > > Ciao > > Hannes > > > _______________________________________________ > COSE mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/cose >
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