Framework to Integrate Post-quantum Key Exchanges into Internet Key Exchange Protocol Version 2 (IKEv2)
draft-tjhai-ipsecme-hybrid-qske-ikev2-02

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Last updated 2018-07-17
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Internet Engineering Task Force                                 C. Tjhai
Internet-Draft                                              M. Tomlinson
Intended status: Informational                              Post-Quantum
Expires: January 2, 2019                                     G. Bartlett
                                                              S. Fluhrer
                                                           Cisco Systems
                                                            D. Van Geest
                                                       ISARA Corporation
                                                                Z. Zhang
                                                        Onboard Security
                                                       O. Garcia-Morchon
                                                                 Philips
                                                            July 1, 2018

  Framework to Integrate Post-quantum Key Exchanges into Internet Key
                  Exchange Protocol Version 2 (IKEv2)
                draft-tjhai-ipsecme-hybrid-qske-ikev2-02

Abstract

   This document describes how to extend Internet Key Exchange Protocol
   Version 2 (IKEv2) so that the shared secret exchanged between peers
   has resistance against quantum computer attacks.  The basic idea is
   to exchange one or more post-quantum key exchange payloads in
   conjunction with the existing (Elliptic Curve) Diffie-Hellman
   payload.

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   This Internet-Draft will expire on January 2, 2019.

Tjhai, et al.            Expires January 2, 2019                [Page 1]
Internet-Draft            Hybrid PQKE for IKEv2                July 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Problem Description . . . . . . . . . . . . . . . . . . .   2
     1.2.  Proposed Extension  . . . . . . . . . . . . . . . . . . .   3
     1.3.  Changes . . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.4.  Document organization . . . . . . . . . . . . . . . . . .   4
   2.  Design criteria . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  The Framework of Hybrid Post-quantum Key Exchange . . . . . .   6
     3.1.  Overall design  . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  Overall Protocol  . . . . . . . . . . . . . . . . . . . .   7
       3.2.1.  First Protocol Round  . . . . . . . . . . . . . . . .   8
       3.2.2.  IKE_AUX round . . . . . . . . . . . . . . . . . . . .  10
       3.2.3.  IKE_AUX exchange  . . . . . . . . . . . . . . . . . .  11
     3.3.  Post-quantum Group Transform Type and Group Identifiers .  11
     3.4.  Hybrid Group Negotiation  . . . . . . . . . . . . . . . .  12
     3.5.  Child SAs . . . . . . . . . . . . . . . . . . . . . . . .  12
   4.  Alternative Design  . . . . . . . . . . . . . . . . . . . . .  12
   5.  Security considerations . . . . . . . . . . . . . . . . . . .  16
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  18
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  18

1.  Introduction

1.1.  Problem Description

   Internet Key Exchange Protocol (IKEv2) as specified in RFC 7296
   [RFC7296] uses the Diffie-Hellman (DH) or Elliptic Curve Diffie-
   Hellman (ECDH) algorithm to establish a shared secret between an
   initiator and a responder.  The security of the DH and ECDH
   algorithms relies on the difficulty to solve a discrete logarithm
   problem in multiplicative and elliptic curve groups respectively when
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