EAP Re-authentication Protocol Extensions for Authenticated Anticipatory Keying (ERP/AAK)
RFC 6630
Internet Engineering Task Force (IETF) Z. Cao
Request for Comments: 6630 H. Deng
Category: Standards Track China Mobile
ISSN: 2070-1721 Q. Wu
Huawei
G. Zorn, Ed.
Network Zen
June 2012
EAP Re-authentication Protocol Extensions
for Authenticated Anticipatory Keying (ERP/AAK)
Abstract
The Extensible Authentication Protocol (EAP) is a generic framework
supporting multiple types of authentication methods.
The EAP Re-authentication Protocol (ERP) specifies extensions to EAP
and the EAP keying hierarchy to support an EAP method-independent
protocol for efficient re-authentication between the peer and an EAP
re-authentication server through any authenticator.
Authenticated Anticipatory Keying (AAK) is a method by which
cryptographic keying material may be established upon one or more
Candidate Attachment Points (CAPs) prior to handover. AAK uses the
AAA infrastructure for key transport.
This document specifies the extensions necessary to enable AAK
support in ERP.
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/rfc6630.
Cao, et al. Standards Track [Page 1]
RFC 6630 ERP/AAK June 2012
Copyright Notice
Copyright (c) 2012 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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2.2. Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. ERP/AAK Description . . . . . . . . . . . . . . . . . . . . . 4
4. ERP/AAK Key Hierarchy . . . . . . . . . . . . . . . . . . . . 7
4.1. Derivation of the pRK and pMSK . . . . . . . . . . . . . . 8
5. Packet and TLV Extension . . . . . . . . . . . . . . . . . . . 9
5.1. EAP-Initiate/Re-auth-Start Packet and TLV Extension . . . 9
5.2. EAP-Initiate/Re-auth Packet and TLV Extension . . . . . . 10
5.3. EAP-Finish/Re-auth Packet and TLV Extension . . . . . . . 12
5.4. TV and TLV Attributes . . . . . . . . . . . . . . . . . . 14
6. Lower-Layer Considerations . . . . . . . . . . . . . . . . . . 15
7. AAA Transport Considerations . . . . . . . . . . . . . . . . . 15
8. Security Considerations . . . . . . . . . . . . . . . . . . . 15
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 18
11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11.1. Normative References . . . . . . . . . . . . . . . . . . . 18
11.2. Informative References . . . . . . . . . . . . . . . . . . 19
Cao, et al. Standards Track [Page 2]
RFC 6630 ERP/AAK June 2012
1. Introduction
The Extensible Authentication Protocol (EAP) [RFC3748] is a generic
framework supporting multiple types of authentication methods. In
systems where EAP is used for authentication, it is desirable not to
repeat the entire EAP exchange with another authenticator. The EAP
Re-authentication Protocol (ERP) [RFC5296] specifies extensions to
EAP and the EAP keying hierarchy to support an EAP method-independent
protocol for efficient re-authentication between the EAP
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