Extensible Authentication Protocol - Generalized Pre-Shared Key (EAP-GPSK) Method
RFC 5433
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RFC - Proposed Standard
(February 2009; No errata)
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2015-10-14
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draft-clancy-emu-eap-shared-secret
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IETF
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plain text
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RFC 5433 (Proposed Standard)
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Pasi Eronen
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Network Working Group T. Clancy
Request for Comments: 5433 LTS
Category: Standards Track H. Tschofenig
Nokia Siemens Networks
February 2009
Extensible Authentication Protocol -
Generalized Pre-Shared Key (EAP-GPSK) Method
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) 2009 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 in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Abstract
This memo defines an Extensible Authentication Protocol (EAP) method
called EAP Generalized Pre-Shared Key (EAP-GPSK). This method is a
lightweight shared-key authentication protocol supporting mutual
authentication and key derivation.
Clancy & Tschofenig Standards Track [Page 1]
RFC 5433 EAP-GPSK February 2009
Table of Contents
1. Introduction ....................................................3
2. Terminology .....................................................4
3. Overview ........................................................6
4. Key Derivation ..................................................8
5. Key Management .................................................11
6. Ciphersuites ...................................................11
7. Generalized Key Derivation Function (GKDF) .....................12
8. Ciphersuites Processing Rules ..................................13
8.1. Ciphersuite #1 ............................................13
8.1.1. Encryption .........................................13
8.1.2. Integrity ..........................................13
8.2. Ciphersuite #2 ............................................14
8.2.1. Encryption .........................................14
8.2.2. Integrity ..........................................14
9. Packet Formats .................................................15
9.1. Header Format .............................................15
9.2. Ciphersuite Formatting ....................................16
9.3. Payload Formatting ........................................16
9.4. Protected Data ............................................21
10. Packet Processing Rules .......................................24
11. Example Message Exchanges .....................................25
12. Security Considerations .......................................28
12.1. Security Claims ..........................................28
12.2. Mutual Authentication ....................................29
12.3. Protected Result Indications .............................29
12.4. Integrity Protection .....................................29
12.5. Replay Protection ........................................30
12.6. Reflection Attacks .......................................30
12.7. Dictionary Attacks .......................................30
12.8. Key Derivation and Key Strength ..........................31
12.9. Denial-of-Service Resistance .............................31
12.10. Session Independence ....................................32
12.11. Compromise of the PSK ...................................32
12.12. Fragmentation ...........................................32
12.13. Channel Binding .........................................32
12.14. Fast Reconnect ..........................................33
12.15. Identity Protection .....................................33
12.16. Protected Ciphersuite Negotiation .......................33
12.17. Confidentiality .........................................34
12.18. Cryptographic Binding ...................................34
13. IANA Considerations ...........................................34
14. Contributors ..................................................35
15. Acknowledgments ...............................................36
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