RFC 3325 (rfc3325) - Page 1 of 18

Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks

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Network Working Group                                        C. Jennings
Request for Comments: 3325                                 Cisco Systems
Category: Informational                                      J. Peterson
                                                           NeuStar, Inc.
                                                               M. Watson
                                                         Nortel Networks
                                                           November 2002


    Private Extensions to the Session Initiation Protocol (SIP) for
               Asserted Identity within Trusted Networks

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This document describes private extensions to the Session Initiation
   Protocol (SIP) that enable a network of trusted SIP servers to assert
   the identity of authenticated users, and the application of existing
   privacy mechanisms to the identity problem.  The use of these
   extensions is only applicable inside an administrative domain with
   previously agreed-upon policies for generation, transport and usage
   of such information.  This document does NOT offer a general privacy
   or identity model suitable for use between different trust domains,
   or use in the Internet at large.

Table of Contents

   1.   Applicability Statement  . . . . . . . . . . . . . . . . . .   2
   2.   Conventions  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.   Introduction . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.   Overview . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.   Proxy Behavior . . . . . . . . . . . . . . . . . . . . . . .   5
   6.   Hints for Multiple Identities  . . . . . . . . . . . . . . .   6
   7.   Requesting Privacy . . . . . . . . . . . . . . . . . . . . .   6
   8.   User Agent Server Behavior . . . . . . . . . . . . . . . . .   7
   9.   Formal Syntax  . . . . . . . . . . . . . . . . . . . . . . .   7
        9.1  The P-Asserted-Identity Header  . . . . . . . . . . . .   8
        9.2  The P-Preferred-Identity Header . . . . . . . . . . . .   8
        9.3  The "id" Privacy Type . . . . . . . . . . . . . . . . .   9



Jennings, et. al.            Informational
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