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Message authentication codes for the Network Time Protocol

Authors
Publication date
31 May 2018
Publisher
Internet Engineering Task Force

Abstract

RFC 5905 [RFC5905] states that Network Time Protocol (NTP) packets should be authenticated by appending a 128-bit key to the NTP data, and hashing the result with MD5 to obtain a 128-bit tag. This document deprecates MD5-based authentication, which is considered to be too weak, and recommends the use of AES-CMAC [RFC4493] as a replacement.https://datatracker.ietf.org/doc/draft-ietf-ntp-mac/First author draf

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