CCNx Key Exchange Protocol Version 1.0
draft-wood-icnrg-ccnxkeyexchange-00

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icnrg                                                           M. Mosko
Internet-Draft                                                   E. Uzun
Intended status: Experimental                                    C. Wood
Expires: January 9, 2017                                            PARC
                                                           July 08, 2016

                 CCNx Key Exchange Protocol Version 1.0
                  draft-wood-icnrg-ccnxkeyexchange-00

Abstract

   This document specifies Version 1.0 of the CCNx Key Exchange (CCNxKE)
   protocol.  The CCNxKE protocol allows two peers to establish a
   shared, forward-secure key for secure and confidential communication.
   The protocol is designed to prevent eavesdropping, tampering, and
   message forgery between two peers.  It is also designed to minimize
   the number of rounds required to establish a shared key.  In the
   worst case, it requires two RTTs between a consumer and producer to
   establish a shared key.  In the best case, one RTT is required before
   sending any application data.  This document outlines how to derive
   the keys used to encrypt traffic for a session and shows how session
   information is exchanged between a consumer and producer using
   message encapsulation.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on January 9, 2017.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Mosko, et al.            Expires January 9, 2017                [Page 1]
Internet-Draft                   CCNxKE                        July 2016

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Conventions and Terminology . . . . . . . . . . . . . . .   4
   2.  Goals . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Presentation Language . . . . . . . . . . . . . . . . . . . .   7
   5.  CCNxKE Overview . . . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Connection Establishment Latency  . . . . . . . . . . . .   7
     5.2.  Connection Migration and Resumption . . . . . . . . . . .   7
     5.3.  Re-Transmissions, Timeouts, and Replay Prevention . . . .   8
     5.4.  Loss Sensitivity  . . . . . . . . . . . . . . . . . . . .   8
   6.  The CCNxKE Protocol . . . . . . . . . . . . . . . . . . . . .   8
     6.1.  Round Overview  . . . . . . . . . . . . . . . . . . . . .   9
     6.2.  Round 1 . . . . . . . . . . . . . . . . . . . . . . . . .  11
     6.3.  Round 2 . . . . . . . . . . . . . . . . . . . . . . . . .  14
     6.4.  Round 3 . . . . . . . . . . . . . . . . . . . . . . . . .  16
   7.  Alternative Exchanges . . . . . . . . . . . . . . . . . . . .  17
     7.1.  One-RTT Exchange  . . . . . . . . . . . . . . . . . . . .  17
   8.  PSK Mode and Session Resumption . . . . . . . . . . . . . . .  18
   9.  Secret Derivation . . . . . . . . . . . . . . . . . . . . . .  19
     9.1.  SourceCookie Derivation . . . . . . . . . . . . . . . . .  20
     9.2.  MoveToken Derivation  . . . . . . . . . . . . . . . . . .  20
     9.3.  SessionID and PreSharedKey Properties, Derivation, and
           Usage . . . . . . . . . . . . . . . . . . . . . . . . . .  21
     9.4.  Key Derivation  . . . . . . . . . . . . . . . . . . . . .  22
     9.5.  Secret Generation and Lifecycle . . . . . . . . . . . . .  23
   10. Re-Key Message  . . . . . . . . . . . . . . . . . . . . . . .  24
   11. Application Data Protocol . . . . . . . . . . . . . . . . . .  24
   12. Security Considerations . . . . . . . . . . . . . . . . . . .  25
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  25
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  25
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