>Some people will argue strongly that unless the Subjects match
>identically, it's impossible for a relying party to treat them as
>referring to one principal. I don't share that view, I think that's
>something that can be defined by the protocol as a whole.

+1. An identifier is semantically a special purpose attribute statement.
It's reasonable (and often desirable) for different issuers to know the
same subject by different identifiers. That may not be convenient for
relying parties where identifier equivalence is clearly convenient; but if
it causes problems they can fix it at the business level.

Josh.



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