CCNx Key Exchange Protocol Version 1.0
draft-wood-icnrg-ccnxkeyexchange-01

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icnrg                                                           M. Mosko
Internet-Draft                                                   E. Uzun
Intended status: Standards Track                                 C. Wood
Expires: May 4, 2017                                                PARC
                                                        October 31, 2016

                 CCNx Key Exchange Protocol Version 1.0
                  draft-wood-icnrg-ccnxkeyexchange-01

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.  An annex provides an example peer-
   to-peer transport protocol for exchanging encrypted CCNx
   communications.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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Copyright Notice

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

Mosko, et al.              Expires May 4, 2017                  [Page 1]
Internet-Draft                   CCNxKE                     October 2016

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Conventions and Terminology . . . . . . . . . . . . . . .   5
   2.  Goals . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Presentation Language . . . . . . . . . . . . . . . . . . . .   7
   5.  CCNxKE Overview . . . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Connection Establishment Latency  . . . . . . . . . . . .   8
     5.2.  Connection Migration and Resumption . . . . . . . . . . .   8
     5.3.  Re-Transmissions, Timeouts, and Replay Prevention . . . .   8
     5.4.  Loss Sensitivity  . . . . . . . . . . . . . . . . . . . .   9
   6.  The CCNxKE Protocol . . . . . . . . . . . . . . . . . . . . .   9
     6.1.  Round Overview  . . . . . . . . . . . . . . . . . . . . .  10
     6.2.  Round 1 . . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.3.  Round 2 . . . . . . . . . . . . . . . . . . . . . . . . .  15
     6.4.  Round 3 . . . . . . . . . . . . . . . . . . . . . . . . .  17
   7.  Alternative Exchanges . . . . . . . . . . . . . . . . . . . .  18
     7.1.  One-RTT Exchange  . . . . . . . . . . . . . . . . . . . .  19
   8.  Resumption and PSK Mode . . . . . . . . . . . . . . . . . . .  20
   9.  Secret Derivation . . . . . . . . . . . . . . . . . . . . . .  21
     9.1.  SourceCookie Derivation . . . . . . . . . . . . . . . . .  21
     9.2.  Move Derivation . . . . . . . . . . . . . . . . . . . . .  21
     9.3.  SessionID and ResumptionCookie Properties, Derivation,
           and Usage . . . . . . . . . . . . . . . . . . . . . . . .  22
     9.4.  Key Derivation  . . . . . . . . . . . . . . . . . . . . .  23
     9.5.  Secret Generation and Lifecycle . . . . . . . . . . . . .  24
   10. Re-Key Message  . . . . . . . . . . . . . . . . . . . . . . .  25
   11. Application Data Protocol . . . . . . . . . . . . . . . . . .  25
   12. Security Considerations . . . . . . . . . . . . . . . . . . .  26
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