time synchronisation software

Description:	RFC2030 - Simple Network Time Protocol Version 4 - The current standard for SNTP, a version of the protocol for implementations which do not need all of the features of NTP. Available here in HTML, PDF, and Postscript formats
URL:	http://www.faqs.org/rfcs/rfc2030.html

Description:	Secure Network Time Protocol (stime) - Information and drafts from the IETF Working Group pursuing authenticated distribution of time information
URL:	http://www.ietf.org/html.charters/stime-charter.html

Description:	Geodsoft How-To: NTP Time Synchronization - A tutorial on installing NTP servers on UNIX (OpenBSD and Linux) and Windows to accurately synchronize computer times
URL:	http://geodsoft.com/howto/timesync/