Network Time Security
draft-dfranke-nts-00

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Network Working Group                                          D. Franke
Internet-Draft                                                    Akamai
Intended status: Standards Track                         October 7, 2016
Expires: April 10, 2017

                         Network Time Security
                          draft-dfranke-nts-00

Abstract

   This memo specifies Network Time Security (NTS), a mechanism for
   using Datagram TLS to provide cryptographic security for the Network
   Time Protocol or other network time synchronization protocols.

Status of This Memo

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

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   This Internet-Draft will expire on April 10, 2017.

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

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Franke                   Expires April 10, 2017                 [Page 1]
Internet-Draft            Network Time Security             October 2016

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  DTLS profile for Network Time Security  . . . . . . . . . . .   4
   4.  Transport mechanisms for DTLS records . . . . . . . . . . . .   4
     4.1.  Transport via NTS port  . . . . . . . . . . . . . . . . .   5
     4.2.  Transport via NTP extension field . . . . . . . . . . . .   5
   5.  The NTS-encapsulated NTPv4 protocol . . . . . . . . . . . . .   7
   6.  The NTS Key Establishment protocol  . . . . . . . . . . . . .   7
     6.1.  NTS-KE record types . . . . . . . . . . . . . . . . . . .   9
       6.1.1.  End of Message  . . . . . . . . . . . . . . . . . . .   9
       6.1.2.  NTS Next Protocol Negotiation . . . . . . . . . . . .   9
       6.1.3.  Error . . . . . . . . . . . . . . . . . . . . . . . .   9
       6.1.4.  Warning . . . . . . . . . . . . . . . . . . . . . . .  10
       6.1.5.  AEAD Algorithm Negotiation  . . . . . . . . . . . . .  10
       6.1.6.  New Cookie for NTPv4  . . . . . . . . . . . . . . . .  11
     6.2.  Key Extraction (generally)  . . . . . . . . . . . . . . .  11
   7.  NTS Extensions for NTPv4  . . . . . . . . . . . . . . . . . .  11
     7.1.  Key Extraction (for NTPv4)  . . . . . . . . . . . . . . .  11
     7.2.  Packet structure overview . . . . . . . . . . . . . . . .  12
     7.3.  The Unique Identifier extension . . . . . . . . . . . . .  13
     7.4.  The NTS Cookie extension  . . . . . . . . . . . . . . . .  13
     7.5.  The NTS Cookie Placeholder extension  . . . . . . . . . .  14
     7.6.  The NTS Authenticator and Encrypted Extensions extension   14
     7.7.  Protocol details  . . . . . . . . . . . . . . . . . . . .  15
   8.  Recommended format for NTS cookies  . . . . . . . . . . . . .  17
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  23
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  23
     11.2.  Informative References . . . . . . . . . . . . . . . . .  24
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .  25
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  25

1.  Introduction

   [[SEE https://github.com/dfoxfranke/nts FOR AN UP-TO-MINUTE DRAFT OF
   THIS MEMO, AND https://github.com/dfoxfranke/nts/issues FOR A LIST OF
   OUTSTANDING ISSUES.]]

   This memo specifies Network Time Security (NTS), a mechanism for
   using Datagram Transport Layer Security [RFC6347] (DTLS) to provide
   cryptographic security for network time synchronization.  A complete
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