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Motivation
Update of RFC 3325 to add support for:
Additional methods in which P-Asserted-Identity can be used: UPDATE, MESSAGE, PUBLISH
Inclusion of P-Asserted-Identity by a trusted UAC (e.g., a gateway in same domain)
Inclusion of P-Asserted-Identity in a response subject to satisfactory authentication of UAS (currently unclear in RFC 3325)
Much of this reflects current practice
PPT Version