On Sat, Jul 09, 2022 at 02:03:10PM +0200, Carsten Bormann wrote:
> 
> I think the text in COSE is fine.  People just don’t want to read what it 
> says… 
> Note that there is nothing about kid that would make you believe all matches 
> for a kid are “owned by the same party”.  That is not even terminology that 
> COSE defines...

We even already say "The identifier is not structured and can be anything
from a **user-provided byte string** to a value computed on the public portion
of the key." (emphasis mine).

A (malicious) user could clearly provide a byte string that has already
been used by a different user.

-Ben

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