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Network Time Security for the Network Time Protocol
RFC 8915

Revision differences

Document history

Date By Action
2026-05-20
(System) Changed metadata: changed keywords to '['Integrity', 'Authentication', 'NTP', 'Security']' from '[]'
2026-05-20
(System) Metadata update from RFC Editor
2026-05-20
(System) Changed author "R. Sundblad": changed name from "Ragnar Sundblad" to "R. Sundblad", cleared country (was "Sweden"), changed order from "4" to "5"
2026-05-20
(System) Changed author "M. Dansarie": changed name from "Marcus Dansarie" to "M. Dansarie", cleared country (was "Sweden"), changed order from "3" to "4"
2026-05-20
(System)
Changed author "K. Teichel": changed name from "Kristof Teichel" to "K. Teichel", changed affiliation from "Physikalisch-Technische
      Bundesanstalt" to "PTB", cleared country (was …
Changed author "K. Teichel": changed name from "Kristof Teichel" to "K. Teichel", changed affiliation from "Physikalisch-Technische
      Bundesanstalt" to "PTB", cleared country (was "Germany"), changed order from "2" to "3"
2026-05-20
(System)
Changed author "D. Sibold": changed name from "Dieter Sibold" to "D. Sibold", changed affiliation from "Physikalisch-Technische
      Bundesanstalt" to "PTB", cleared country (was …
Changed author "D. Sibold": changed name from "Dieter Sibold" to "D. Sibold", changed affiliation from "Physikalisch-Technische
      Bundesanstalt" to "PTB", cleared country (was "Germany"), changed order from "1" to "2"
2026-05-20
(System)
Changed author "D. Franke": changed name from "Daniel Franke" to "D. Franke", changed affiliation from "Akamai Technologies" to "Akamai", cleared country (was "United States"), changed …
Changed author "D. Franke": changed name from "Daniel Franke" to "D. Franke", changed affiliation from "Akamai Technologies" to "Akamai", cleared country (was "United States"), changed order from "0" to "1"
2026-05-20
(System) Metadata update from RFC Editor
2020-10-05
(System) IANA registries were updated to include RFC8915
2020-09-30
(System)
Received changes through RFC Editor sync (created alias RFC 8915, changed abstract to 'This memo specifies Network Time Security (NTS), a mechanism for using …
Received changes through RFC Editor sync (created alias RFC 8915, changed abstract to 'This memo specifies Network Time Security (NTS), a mechanism for using Transport Layer Security (TLS) and Authenticated Encryption with Associated Data (AEAD) to provide cryptographic security for the client-server mode of the Network Time Protocol (NTP).

NTS is structured as a suite of two loosely coupled sub-protocols. The first (NTS Key Establishment (NTS-KE)) handles initial authentication and key establishment over TLS. The second (NTS Extension Fields for NTPv4) handles encryption and authentication during NTP time synchronization via extension fields in the NTP packets, and holds all required state only on the client via opaque cookies.', changed pages to 33, changed standardization level to Proposed Standard, changed state to RFC, added RFC published event at 2020-09-30, changed IESG state to RFC Published)
2020-09-30
(System) RFC published