Technical Summary
RFC3261 introduces the concept of adding an S/MIME body to a SIP
request or response in order to provide reference integrity over its
headers. This document provides a more specific mechanism to derive
integrity and authentication properties from an 'authenticated
identity body', a digitally-signed SIP message or message fragment.
A standard format for such bodies (known as Authenticated Identity
Bodies, or AIBs) is given in this document. Some considerations for
the processing of AIBs by recipients of SIP messages with such bodies
are also given.
An important usage of the Authenticated Identity Body is seen in
conjunction with SIP's Referred-By mechanism.
Working Group Summary
The working group strongly supported the advancement of AIB.
Protocol Quality
There were review comments for this document during WG discussion.
There were no dissenting comments during Working Group Last Call
or IETF Last Call. The document was reviewed for the IESG by Eric
Rescorla and Allison Mankin.