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Title : SIP Identity using Media Path
Author(s) : D. Wing
Filename : draft-wing-sip-identity-media-00.txt
Pages : 18
Date : 2007-7-5
The existing SIP identity mechanism (RFC4474) creates a signature
over the SIP body, including the entire SDP. As part of their normal
operation, Session Border Controllers (SBCs) and SIP Back-to-Back
User Agents (B2BUAs) modify various fields in the SDP, breaking the
signature.
This document defines a new mechanism to securely identify the
originator of a SIP message while also allowing modification of the
SDP by SBCs and B2BUAs. This new mechanism creates a signature over
certain SIP headers and certain SDP lines. Proof of identity over
the media path using DTLS, TLS, HIP, and an extension to ICE are
described.
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