Is this not precisely:
[R-Anonymity]SAML will allow assertions to be made about anonymous
principals...
from the use-case document? Is there a new requirement here beyond
[R-Anonymity]?
> This ability -- to have authorization attributes associated with a
> requestor without the requestor's principal identity being
> revealed -- is one of the key "use cases" in Shibboleth.
> I am very interested in seeing this type of assertion as part
>of SAML It is definitely necessary for Shibboleth, but I believe
>it will be useful outside the strict Shibboleth space as well.
Regards,
Marlena Erdos
IBM/Tivoli
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