@misc{rfc8573, series = {Request for Comments}, number = 8573, howpublished = {RFC 8573}, publisher = {RFC Editor}, doi = {10.17487/RFC8573}, url = {https://www.rfc-editor.org/info/rfc8573}, author = {Aanchal Malhotra and Sharon Goldberg}, title = {{Message Authentication Code for the Network Time Protocol}}, pagetotal = 5, year = 2019, month = jun, 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.}, }