RFC 3547 (rfc3547) - Page 1 of 48


The Group Domain of Interpretation



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Network Working Group                                         M. Baugher
Request for Comments: 3547                                       B. Weis
Category: Standards Track                                          Cisco
                                                             T. Hardjono
                                                                Verisign
                                                               H. Harney
                                                                  Sparta
                                                               July 2003


                  The Group Domain of Interpretation

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 presents an ISAMKP Domain of Interpretation (DOI) for
   group key management to support secure group communications.  The
   GDOI manages group security associations, which are used by IPSEC and
   potentially other data security protocols running at the IP or
   application layers.  These security associations protect one or more
   key-encrypting keys, traffic-encrypting keys, or data shared by group
   members.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
       1.1.  GDOI Applications. . . . . . . . . . . . . . . . . . . .  5
       1.2.  Extending GDOI . . . . . . . . . . . . . . . . . . . . .  5
   2.  GDOI Phase 1 protocol. . . . . . . . . . . . . . . . . . . . .  6
       2.1.  ISAKMP Phase 1 protocol. . . . . . . . . . . . . . . . .  6
             2.1.1.  DOI value. . . . . . . . . . . . . . . . . . . .  6
             2.1.2.  UDP port . . . . . . . . . . . . . . . . . . . .  6
   3.  GROUPKEY-PULL Exchange . . . . . . . . . . . . . . . . . . . .  6
       3.1.  Authorization. . . . . . . . . . . . . . . . . . . . . .  7
       3.2.  Messages . . . . . . . . . . . . . . . . . . . . . . . .  7
             3.2.1.  Perfect Forward Secrecy. . . . . . . . . . . . .  9
             3.2.2.  ISAKMP Header Initialization . . . . . . . . . .  9



Baugher, et. al.            Standards Track


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