Definition of Master Key between PANA Client and Enforcement Point
RFC 5807

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Internet Engineering Task Force (IETF)                           Y. Ohba
Request for Comments: 5807                                       Toshiba
Category: Standards Track                                       A. Yegin
ISSN: 2070-1721                                                  Samsung
                                                              March 2010

   Definition of Master Key between PANA Client and Enforcement Point

Abstract

   This document defines a master key used between a client of the
   Protocol for carrying Authentication for Network Access (PANA) and an
   enforcement point, for bootstrapping lower-layer ciphering.  The
   master key is derived from the Master Session Key of the Extensible
   Authentication Protocol as a result of successful PANA
   authentication.  The master key guarantees cryptographic independence
   among enforcement points bootstrapped from PANA authentication across
   different address families.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc5807.

Copyright Notice

   Copyright (c) 2010 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
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Ohba & Yegin                 Standards Track                    [Page 1]
RFC 5807                    PaC-EP Master Key                 March 2010

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
     1.1.  Specification of Requirements . . . . . . . . . . . . . . . 4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 4
   3.  PaC-EP Master Key . . . . . . . . . . . . . . . . . . . . . . . 4
     3.1.  Key Name of PEMK  . . . . . . . . . . . . . . . . . . . . . 5
     3.2.  Scope of PEMK . . . . . . . . . . . . . . . . . . . . . . . 5
     3.3.  Context of PEMK . . . . . . . . . . . . . . . . . . . . . . 5
     3.4.  Lifetime of PEMK  . . . . . . . . . . . . . . . . . . . . . 5
   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 5
     4.1.  Channel Binding . . . . . . . . . . . . . . . . . . . . . . 5
     4.2.  Guideline for Distributing PEMK from PAA to EP  . . . . . . 6
   5.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 6
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 6
     6.1.  Normative References  . . . . . . . . . . . . . . . . . . . 6
     6.2.  Informative References  . . . . . . . . . . . . . . . . . . 7

Ohba & Yegin                 Standards Track                    [Page 2]
RFC 5807                    PaC-EP Master Key                 March 2010

1.  Introduction

   The Protocol for carrying Authentication for Network Access (PANA)
   [RFC5191] is designed to facilitate network access authentication and
   authorization of clients in access networks.  It carries Extensible
   Authentication Protocol (EAP) [RFC3748] between a PANA Client (PaC)
   and a PANA Authentication Agent (PAA) where the PAA functions as an
   authentication gateway to the Authentication Server (AS).  The PANA
   framework [RFC5193] defines an another entity referred to as an
   Enforcement Point (EP), which resides in the access network and
   allows access (data traffic) of authorized PaCs while preventing
   access of others depending on the PANA authentication and
   authorization result (Figure 1).  The EP and PAA may be implemented
   on the same device or separate devices.

                                                RADIUS,
                                                Diameter,
          +-----+       PANA        +-----+     LDAP, API, etc. +-----+
          | PaC |<----------------->| PAA |<------------------->| AS  |
          +-----+                   +-----+                     +-----+
             ^                         ^
             |                         |
             |         +-----+         |
     IKE,    +-------->| EP  |<--------+ ANCP, API, etc.