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Network Working Group                                        N. Williams
Request for Comments: 5386                                           Sun
Category: Standards Track                                  M. Richardson
                                                                     SSW
                                                           November 2008


     Better-Than-Nothing Security: An Unauthenticated Mode of IPsec

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) 2008 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.

Abstract

   This document specifies how to use the Internet Key Exchange (IKE)
   protocols, such as IKEv1 and IKEv2, to setup "unauthenticated"
   security associations (SAs) for use with the IPsec Encapsulating
   Security Payload (ESP) and the IPsec Authentication Header (AH).  No
   changes to IKEv2 bits-on-the-wire are required, but Peer
   Authorization Database (PAD) and Security Policy Database (SPD)
   extensions are specified.  Unauthenticated IPsec is herein referred
   to by its popular acronym, "BTNS" (Better-Than-Nothing Security).


Williams & Richardson       Standards Track                     [Page 1]