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Network Time Protocol: autokey Version 2 Specification

The information below is for an old version of the document.
Document Type This is an older version of an Internet-Draft whose latest revision is Expired
Authors Dieter Sibold , Stephen Roettger
Last updated 2013-01-31 (Latest revision 2012-07-30)
Stream (None)
Expired & archived
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)
This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at:


This document describes a security protocol that enables authenticated time synchronization using Network Time Protocol (NTP). Autokey Version 2 obsoletes NTP autokey protocol (RFC 5906) which suffers from various security vulnerabilities. Its design considers the special requirements that are related to the task of precise timekeeping.


Dieter Sibold
Stephen Roettger

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