Framework to Integrate Post-quantum Key Exchanges into Internet Key Exchange Protocol Version 2 (IKEv2)
draft-tjhai-ipsecme-hybrid-qske-ikev2-01

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Last updated 2018-01-15
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Internet Engineering Task Force                                 C. Tjhai
Internet-Draft                                              M. Tomlinson
Intended Status: Informational                              Post-Quantum
Expires: July 19, 2018                                       G. Bartlett
                                                              S. Fluhrer
                                                           Cisco Systems
                                                            D. Van Geest
                                                       ISARA Corporation
                                                                Z. Zhang
                                                        Onboard Security
                                                       O. Garcia-Morchon
                                                                 Philips
                                                        January 15, 2018

           Framework to Integrate Post-quantum Key Exchanges 
         into Internet Key Exchange Protocol Version 2 (IKEv2)
                draft-tjhai-ipsecme-hybrid-qske-ikev2-01

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.  This document also addresses the challenge of fragmentation
   as a result of sending large post quantum key exchange data in the
   first pair of message of the initial exchange phase.

Status of This Memo

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   This Internet-Draft will expire on July 19, 2018.

 

Tjhai et al.             Expires July 19, 2018                  [Page 1]
Internet-Draft           Hybrid PQKE for IKEv2          January 15, 2018

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Problem Description  . . . . . . . . . . . . . . . . . . .  3
     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 . . . . . . . . . . . . . . . . .  7
       3.2.2.  Second Protocol Round  . . . . . . . . . . . . . . . . 10
       3.2.3.  Child SA Negotiation . . . . . . . . . . . . . . . . . 11
     3.3.  Computation of a Post-Quantum Shared Secret  . . . . . . . 12
     3.4.  Post-Quantum Group Transform Type and Group Identifiers  . 12
     3.5.  Hybrid Group Negotiation . . . . . . . . . . . . . . . . . 13
       3.5.1.  Protocol for the Initiator . . . . . . . . . . . . . . 14
       3.5.2. Protocol from the Responder . . . . . . . . . . . . . . 17
     3.6.  Fragmentation Support  . . . . . . . . . . . . . . . . . . 19
       3.6.1.  Fragmentation Problem Description  . . . . . . . . . . 19
       3.6.2.  Fragmentation Solution . . . . . . . . . . . . . . . . 19
         3.6.2.1.  Fragmentation Pointer Payload  . . . . . . . . . . 19
         3.6.2.2.  Fragmentation Body Payload . . . . . . . . . . . . 20
         3.6.2.3.  Fragmentation Semantics  . . . . . . . . . . . . . 23
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