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RFC 9523
Title: A Secure Selection and Filtering Mechanism
for the Network Time Protocol with Khronos
Author: N. Rozen-Schiff,
D. Dolev,
T. Mizrahi,
M. Schapira
Status: Informational
Stream: IETF
Date: February 2024
Mailbox: [email protected],
[email protected],
[email protected],
[email protected]
Pages: 13
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-ntp-chronos-25.txt
URL: https://www.rfc-editor.org/info/rfc9523
DOI: 10.17487/RFC9523
The Network Time Protocol version 4 (NTPv4), as defined in RFC 5905,
is the mechanism used by NTP clients to synchronize with NTP servers
across the Internet. This document describes a companion application
to the NTPv4 client, named "Khronos", that is used as a "watchdog"
alongside NTPv4 and that provides improved security against
time-shifting attacks. Khronos involves changes to the NTP client's
system process only. Since it does not affect the wire protocol, the
Khronos mechanism is applicable to current and future time protocols.
This document is a product of the Network Time Protocols Working Group of the
IETF.
INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
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