RFC 8573

Message Authentication Code for the Network Time Protocol, June 2019

Canonical URL:
https://www.rfc-editor.org/rfc/rfc8573.txt
File formats:
icon for text file icon for PDF icon for HTML
Status:
PROPOSED STANDARD
Updates:
RFC 5905
Authors:
A. Malhotra
S. Goldberg
Stream:
IETF
Source:
ntp (int)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC8573

Discuss this RFC: Send questions or comments to ntp@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF


Abstract

The Network Time Protocol (NTP), as described in RFC 5905, states that NTP packets should be authenticated by appending NTP data to a 128-bit key and hashing the result with MD5 to obtain a 128-bit tag. This document deprecates MD5-based authentication, which is considered too weak, and recommends the use of AES-CMAC as described in RFC 4493 as a replacement.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


Download PDF Reader