Re: [Rats] [sacm] CoSWID and EAT and CWT

Great, thanks Laurence.  If that's easier I think having the CoSWID in one
claim should be ok and would have the same result as the suggestion I
made.  Changing the CoSWID format is a big enough process that it shouldn't
happen very often.

Best regards,
Kathleen

On Wed, Nov 20, 2019 at 8:00 PM Ira McDonald <blueroofmusic@gmail.com>
wrote:

> Hi Laurence,
>
> That seems like a good suggestion for a simple way to integrate CoSWID
> content
> into EAT.
>
> Cheers,
> - Ira
>
> Ira McDonald (Musician / Software Architect)
> Co-Chair - TCG Trusted Mobility Solutions WG
> Co-Chair - TCG Metadata Access Protocol SG
> Chair - Linux Foundation Open Printing WG
> Secretary - IEEE-ISTO Printer Working Group
> Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG
> IETF Designated Expert - IPP & Printer MIB
> Blue Roof Music / High North Inc
> http://sites.google.com/site/blueroofmusic
> http://sites.google.com/site/highnorthinc
> mailto: blueroofmusic@gmail.com
> PO Box 221  Grand Marais, MI 49839  906-494-2434
>
>
>
> On Wed, Nov 20, 2019 at 7:35 PM Laurence Lundblade <lgl@island-resort.com>
> wrote:
>
>> Hi,
>>
>> I’m not on the SACM list, but did look at the archive. Hopefully I’m not
>> out of sync.
>>
>> My thought is to register one claim for CWT that is an entire CoSWID (in
>> CDDL the concise-swid-tag).
>>
>> That way CoSWID can grow and develop on its own without lots of adds and
>> subtracts to the CWT registry. It has its own IANA registry with its own
>> experts and such. Seems like the coupling / factoring is about right.
>>
>> This would also be the way I’d like to have it in EAT attestation. We’ve
>> done a mini version of this with the location claim
>> <https://tools.ietf.org/html/draft-ietf-rats-eat-01#section-3.8>.
>>
>> Then if you just want to sign a CoSWID CWT style, this works pretty well
>> too. It has a slight overhead compared to having all the CoSWID data items
>> as direct CWT claims in that it will have an additional map layer, but that
>> is only about three bytes.
>>
>> LL
>>
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-- 

Best regards,
Kathleen