IETF RFC 8573
Message Authentication Code for the Network Time Protocol
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| Organization: | IETF |
| Publication Date: | 1 June 2019 |
| Status: | active |
| Page Count: | 5 |
scope:
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.
Document History
IETF RFC 8573
June 1, 2019
Message Authentication Code for the Network Time Protocol
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...