On Implementing Time

The information below is for an old version of the document
Document Type Expired Internet-Draft (candidate for ntp WG)
Last updated 2019-04-25 (latest revision 2018-10-22)
Replaced by draft-ietf-ntp-implementation-guidance
Stream IETF
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state Call For Adoption By WG Issued
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes the properties of different types of clocks available on digital systems. It provides implementors of applications with guidance on choices they have to make when working with time to provide basic functionality and security guarantees.


Aanchal Malhotra (aanchal4@bu.edu)
Kristof Teichel (kristof.teichel@ptb.de)
Martin Hoffmann (martin@nlnetlabs.nl)
Willem Toorop (willem@nlnetlabs.nl)

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