Internet Engineering Task Force (IETF) Y. Sheffer
Request for Comments: 6124 Independent
Category: Informational G. Zorn
ISSN: 2070-1721 Network Zen
H. Tschofenig
Nokia Siemens Networks
S. Fluhrer
Cisco
February 2011
An EAP Authentication Method Based on
the Encrypted Key Exchange (EKE) Protocol
Abstract
The Extensible Authentication Protocol (EAP) describes a framework
that allows the use of multiple authentication mechanisms. This
document defines an authentication mechanism for EAP called EAP-EKE,
based on the Encrypted Key Exchange (EKE) protocol. This method
provides mutual authentication through the use of a short, easy to
remember password. Compared with other common authentication
methods, EAP-EKE is not susceptible to dictionary attacks. Neither
does it require the availability of public-key certificates.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
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). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see 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/rfc6124.
Sheffer, et al. Informational [Page 1]
RFC 6124 The EAP-EKE Method February 2011
Copyright Notice
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Without obtaining an adequate license from the person(s) controlling
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not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Sheffer, et al. Informational [Page 2]
RFC 6124 The EAP-EKE Method February 2011
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Message Flows . . . . . . . . . . . . . . . . . . . . . . 4
4. Message Formats . . . . . . . . . . . . . . . . . . . . . . . 7
4.1. EAP-EKE Header . . . . . . . . . . . . . . . . . . . . . . 7
4.2. EAP-EKE Payloads . . . . . . . . . . . . . . . . . . . . . 8
4.2.1. The EAP-EKE-ID Payload . . . . . . . . . . . . . . . . 8
4.2.2. The EAP-EKE-Commit Payload . . . . . . . . . . . . . . 10
4.2.3. The EAP-EKE-Confirm Payload . . . . . . . . . . . . . 11
4.2.4. The EAP-EKE-Failure Payload . . . . . . . . . . . . . 12
4.3. Protected Fields . . . . . . . . . . . . . . . . . . . . . 13
4.4. Encrypted Fields . . . . . . . . . . . . . . . . . . . . . 14
4.5. Channel Binding Values . . . . . . . . . . . . . . . . . . 14
5. Protocol Sequence . . . . . . . . . . . . . . . . . . . . . . 15
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