Public-Key Cryptography for the Network Time Protocol Version 2
draft-ietf-stime-ntpauth-04

Document Type Expired Internet-Draft (stime WG)
Last updated 2005-05-26 (latest revision 2002-11-05)
Stream IETF
Intended RFC status Proposed Standard
Formats
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired (IESG: Dead)
Consensus Boilerplate Unknown
Telechat date
Responsible AD Russ Housley
Send notices to <wpolk@nist.gov>, <pcain@bbn.com>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at
https://www.ietf.org/archive/id/draft-ietf-stime-ntpauth-04.txt

Abstract

This document describes the Autokey security model for authenticating servers to clients using the Network Time Protocol (NTP) and public key cryptography. its design is based on the premiss that IPSEC schemes cannot be adopted intact, since that would preclude stateless servers and severely compromise timekeeping accuracy. In addition, PKI schemes presume authenticated time values are always available to enforce certificate lifetimes; however, cryptographically verified timestamps require interaction between the timekeeping function and authentication function in ways not yet considered by the IETF. This Document includes the Autokey requirements analysis, design principles and protocol specification. A detailed description of the protocol states, events and transition functions is included. A prototype of the Autokey design based on this document has been implemented, tested and documented in the NTP Version 4 (NTPv4) software distribution for Unix, Windows and VMS at http://www.ntp.org.

Authors

David Mills (mills@udel.edu)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)