Improved Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA')
draft-ietf-emu-rfc5448bis-02

Document Type Active Internet-Draft (emu WG)
Last updated 2018-09-17
Replaces draft-arkko-eap-rfc5448bis
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Network Working Group                                           J. Arkko
Internet-Draft                                             V. Lehtovirta
Obsoletes: 5448 (if approved)                                V. Torvinen
Updates: 4187 (if approved)                                     Ericsson
Intended status: Informational                                 P. Eronen
Expires: March 21, 2019                                            Nokia
                                                      September 17, 2018

 Improved Extensible Authentication Protocol Method for 3rd Generation
              Authentication and Key Agreement (EAP-AKA')
                      draft-ietf-emu-rfc5448bis-02

Abstract

   This specification defines a new EAP method, EAP-AKA', a small
   revision of the EAP-AKA method.  The change is a new key derivation
   function that binds the keys derived within the method to the name of
   the access network.  The new key derivation mechanism has been
   defined in the 3rd Generation Partnership Project (3GPP).  This
   specification allows its use in EAP in an interoperable manner.  In
   addition, EAP-AKA' employs SHA-256 instead of SHA-1.

   This specification also updates RFC 4187 EAP-AKA to prevent bidding
   down attacks from EAP-AKA'.

   This version of the EAP-AKA' specification provides updates to
   specify the protocol behaviour for 5G deployments as well.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on March 21, 2019.

Arkko, et al.            Expires March 21, 2019                 [Page 1]
Internet-Draft                  EAP-AKA'                  September 2018

Copyright Notice

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   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   5
   3.  EAP-AKA'  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  AT_KDF_INPUT  . . . . . . . . . . . . . . . . . . . . . .   8
     3.2.  AT_KDF  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     3.3.  Key Generation  . . . . . . . . . . . . . . . . . . . . .  13
     3.4.  Hash Functions  . . . . . . . . . . . . . . . . . . . . .  15
       3.4.1.  PRF'  . . . . . . . . . . . . . . . . . . . . . . . .  15
       3.4.2.  AT_MAC  . . . . . . . . . . . . . . . . . . . . . . .  15
       3.4.3.  AT_CHECKCODE  . . . . . . . . . . . . . . . . . . . .  15
   4.  Bidding Down Prevention for EAP-AKA . . . . . . . . . . . . .  16
   5.  Peer Identities . . . . . . . . . . . . . . . . . . . . . . .  17
     5.1.  Username Types in EAP-AKA' Identities . . . . . . . . . .  18
     5.2.  Generating Pseudonyms and Fast Re-Authentication
           Identities  . . . . . . . . . . . . . . . . . . . . . . .  18
     5.3.  Identifier Usage in 5G  . . . . . . . . . . . . . . . . .  19
       5.3.1.  Key Derivation  . . . . . . . . . . . . . . . . . . .  20
       5.3.2.  EAP Identity Response and EAP-AKA' AT_IDENTITY
               Attribute . . . . . . . . . . . . . . . . . . . . . .  21
   6.  Exported Parameters . . . . . . . . . . . . . . . . . . . . .  23
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  24
     7.1.  Privacy . . . . . . . . . . . . . . . . . . . . . . . . .  26
     7.2.  Discovered Vulnerabilities  . . . . . . . . . . . . . . .  28
     7.3.  Pervasive Monitoring  . . . . . . . . . . . . . . . . . .  30
     7.4.  Security Properties of Binding Network Names  . . . . . .  31
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  32
     8.1.  Type Value  . . . . . . . . . . . . . . . . . . . . . . .  32
     8.2.  Attribute Type Values . . . . . . . . . . . . . . . . . .  32
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