Network Time Protocol Version 4: Autokey Specification
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From: The IESG <email@example.com> To: IETF-Announce <firstname.lastname@example.org> Cc: Internet Architecture Board <email@example.com>, RFC Editor <firstname.lastname@example.org>, ntp mailing list <email@example.com>, ntp chair <firstname.lastname@example.org> Subject: Document Action: 'Network Time Protocol Version 4 Autokey Specification' to Informational RFC The IESG has approved the following document: - 'Network Time Protocol Version 4 Autokey Specification ' <draft-ietf-ntp-autokey-08.txt> as an Informational RFC This document is the product of the Network Time Protocol Working Group. The IESG contact persons are Ralph Droms and Jari Arkko. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-ntp-autokey-08.txt
Technical Summary This document describes the Autokey security model for authenticating servers to clients using the Network Time Protocol (NTP) and public key cryptography. Its design is based on the premise that IPSEC schemes cannot be adopted intact, since that would preclude stateless servers and severely compromise timekeeping accuracy. In addition, PKI schemes presume authenticated time values are always available to enforce certificate lifetimes; however, cryptographically verified timestamps require interaction between the timekeeping and authentication functions. This document includes the Autokey requirements analysis, design principles and protocol specification. A detailed description of the protocol states, events and transition functions is included. A prototype of the Autokey design based on this memo has been implemented, tested and documented in the NTP Version 4 (NTPv4) software distribution for Unix, Windows and VMS at http://www.ntp.org. Working Group Summary The NTP working group has done extensive reviews of this document, and it reflects the consensus of the working group. Document Quality This document has been reviewed by several members of the email@example.com mailing list and by the NTP WG chairs. Personnel Karen O'Donoghue is the responsible document shepherd. Ralph Droms is the responsible Area Director.