I-D ACTION:draft-ietf-ipsec-isakmp-SA-revised-00.txt

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This draft is a work item of the IP Security Protocol Working Group of the IETF.

	Title		: Revised SA negotiation mode for ISAKMP/Oakley
	Author(s)	: B. Patel, M. Jeronimo
	Filename	: draft-ietf-ipsec-isakmp-SA-revised-00.txt
	Pages		: 5
	Date		: 04-Dec-97
	
   ISAKMP/OAKLEY [2][3] is the key management protocol defined by IPSEC
   working to be a framework for authentication, security association
   negotiation and key management. The protocol defines two phases
   whereby, in the phase 1, the peers are authenticates, the security
   association (SA) for ISAKMP/Oakley, and keying material is agreed
   upon by the peers to secure ISAKMP messages. The phase 2 is used to
   negotiate security association for security applications (e.g.,
   IPSEC AH and ESP). When perfect forward secrecy is required, phase 2
   is also used to exchange keying material for the application.
   However, when perfect forward secrecy is not a requirement, the
   keying material from the phase 1 is used to generate session keys
   for the secure communication applications.
 
   The proposal in this document is based on the observation that when
   perfect forward secrecy is not a requirement, if application
   specific SA was negotiated during phase 1, the application can start
   immediately after phase 1. The phase 2 can be used subsequently for
   key refresh on per need bases in the future. Therefore, this
   proposal reduces startup time for communication and improves the
   efficiency of the protocol.
 
   Remark: This document is NOT self-contained, it is intended as an
   addendum to [2][3]. Thus, it is best read in conjunction with
   [2][3].

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