RFC 3329 (rfc3329) - Page 1 of 24
Security Mechanism Agreement for the Session Initiation Protocol (SIP)
Alternative Format: Original Text Document
Network Working Group J. Arkko
Request for Comments: 3329 V. Torvinen
Category: Standards Track G. Camarillo
Ericsson
A. Niemi
T. Haukka
Nokia
January 2003
Security Mechanism Agreement for the
Session Initiation Protocol (SIP)
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
This document defines new functionality for negotiating the security
mechanisms used between a Session Initiation Protocol (SIP) user
agent and its next-hop SIP entity. This new functionality
supplements the existing methods of choosing security mechanisms
between SIP entities.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Motivations . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Design Goals . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Conventions . . . . . . . . . . . . . . . . . . . . . . 3
2. Solution . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Overview of Operation . . . . . . . . . . . . . . . . . 3
2.2 Syntax . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Protocol Operation . . . . . . . . . . . . . . . . . . . 6
2.3.1 Client Initiated . . . . . . . . . . . . . . . . . . 6
2.3.2 Server Initiated . . . . . . . . . . . . . . . . . . 8
2.4 Security Mechanism Initiation. . . . . . . . . . . . . . 9
2.5 Duration of Security Associations. . . . . . . . . . . .10
2.6 Summary of Header Field Use. . . . . . . . . . . . . . .10
Arkko, et. al. Standards Track