NTS4PTP - Key Management System for the Precision Time Protocol Based on the Network Time Security Protocol
draft-langer-ntp-nts-for-ptp-01

Document Type Active Internet-Draft (individual)
Authors Martin Langer  , Rainer Bermbach 
Last updated 2021-03-08
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Network Time Protocol                                          M. Langer
Internet-Draft                                               R. Bermbach
Intended status: Standards Track                     Ostfalia University
Expires: September 9, 2021                                 March 8, 2021

NTS4PTP - Key Management System for the Precision Time Protocol Based on
                   the Network Time Security Protocol
                    draft-langer-ntp-nts-for-ptp-01

Abstract

   This document defines a key management service for automatic key
   management for the integrated security mechanism (Prong A) of IEEE
   Std 1588[TM]-2019 described there in Annex P.  It implements a key
   management for immediate security processing complementing the
   exemplary GDOI proposal in P.2.1.2.1.  The key management service is
   based on the "NTS Key Establishment" protocol defined in IETF RFC
   8915 for securing NTP, but works completely independent from NTP.

Status of This Memo

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   This Internet-Draft will expire on September 9, 2021.

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Langer & Bermbach       Expires September 9, 2021               [Page 1]
Internet-Draft                   NTS4PTP                      March 2021

   include Simplified BSD License text as described in Section 4.e of
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Table of Contents

   1.  Notational Conventions  . . . . . . . . . . . . . . . . . . .   3
   2.  Key Management Using Network Time Security  . . . . . . . . .   3
     2.1.  Principle Key Distribution Mechanism  . . . . . . . . . .   5
       2.1.1.  NTS Message Exchange for Group-based Approach . . . .   8
       2.1.2.  NTS Message Exchange for the Ticket-based Approach  .  10
     2.2.  General Topics  . . . . . . . . . . . . . . . . . . . . .  13
       2.2.1.  Key Update Process  . . . . . . . . . . . . . . . . .  13
       2.2.2.  Key Generation  . . . . . . . . . . . . . . . . . . .  16
       2.2.3.  Time Information of the KE Server . . . . . . . . . .  17
       2.2.4.  Certificates  . . . . . . . . . . . . . . . . . . . .  17
       2.2.5.  Upfront Configuration . . . . . . . . . . . . . . . .  18
         2.2.5.1.  Security Parameters . . . . . . . . . . . . . . .  18
         2.2.5.2.  Key Lifetimes . . . . . . . . . . . . . . . . . .  19
         2.2.5.3.  Certificates  . . . . . . . . . . . . . . . . . .  19
         2.2.5.4.  Authorization . . . . . . . . . . . . . . . . . .  19
         2.2.5.5.  Transparent Clocks  . . . . . . . . . . . . . . .  20
         2.2.5.6.  Start-up considerations . . . . . . . . . . . . .  21
     2.3.  Overview of NTS Messages and their Structure for Use with
           PTP . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
       2.3.1.  PTP Key Request Message . . . . . . . . . . . . . . .  23
       2.3.2.  PTP Key Grant Message . . . . . . . . . . . . . . . .  24
       2.3.3.  PTP Refusal Message . . . . . . . . . . . . . . . . .  26
       2.3.4.  PTP Registration Request Message  . . . . . . . . . .  27
       2.3.5.  PTP Registration Success Message  . . . . . . . . . .  28
       2.3.6.  PTP Registration Revoke Message . . . . . . . . . . .  29
   3.  NTS Messages for PTP  . . . . . . . . . . . . . . . . . . . .  30
     3.1.  NTS Message Types . . . . . . . . . . . . . . . . . . . .  31
     3.2.  NTS Records . . . . . . . . . . . . . . . . . . . . . . .  36
       3.2.1.  AEAD Algorithm Negotiation  . . . . . . . . . . . . .  36
       3.2.2.  Association Mode  . . . . . . . . . . . . . . . . . .  38
       3.2.3.  Current Parameters Container  . . . . . . . . . . . .  41
       3.2.4.  End of Message  . . . . . . . . . . . . . . . . . . .  43
       3.2.5.  Error . . . . . . . . . . . . . . . . . . . . . . . .  43
       3.2.6.  Grace Period  . . . . . . . . . . . . . . . . . . . .  44
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