RFC8573: Message authentication code for the network time protocol
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Citation (published version)Sharon Goldberg, Aanchal Malhotra. 2019. "RFC8573: Message Authentication Code for the Network Time Protocol." https://www.rfc-editor.org/rfc/rfc8573.html
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.
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