A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Secure Network Time Protocol Working Group of the IETF.
Title : Public-Key Cryptography for the Network Time Protocol
Version 2
Author(s) : D. Mills
Filename : draft-ietf-stime-ntpauth-04.txt
Pages : 67
Date : 2002-11-5
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 premiss 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 function and
authentication function in ways not yet considered by the IETF.
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 document has been
implemented, tested and documented in the NTP Version 4 (NTPv4)
software distribution for Unix, Windows and VMS at
http://www.ntp.org.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-stime-ntpauth-04.txt
To remove yourself from the IETF Announcement list, send a message to
ietf-announce-request with the word unsubscribe in the body of the message.
Internet-Drafts are also available by anonymous FTP. Login with the username
"anonymous" and a password of your e-mail address. After logging in,
type "cd internet-drafts" and then
"get draft-ietf-stime-ntpauth-04.txt".
A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
Internet-Drafts can also be obtained by e-mail.
Send a message to:
mailserv@ietf.org.
In the body type:
"FILE /internet-drafts/draft-ietf-stime-ntpauth-04.txt".
NOTE: The mail server at ietf.org can return the document in
MIME-encoded form by using the "mpack" utility. To use this
feature, insert the command "ENCODING mime" before the "FILE"
command. To decode the response(s), you will need "munpack" or
a MIME-compliant mail reader. Different MIME-compliant mail readers
exhibit different behavior, especially when dealing with
"multipart" MIME messages (i.e. documents which have been split
up into multiple messages), so check your local documentation on
how to manipulate these messages.
Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.
- <ftp://ftp.ietf.org/internet-drafts/draft-ietf-stime-ntpauth-04.txt>
-
