Is internet time good enough for cybersecurity? - GPS World
Network Time Protocol - an overview | ScienceDirect Topics
Accurate Global Time Synchronization
Atomic Clocks for computer time sync | atomic-clock.galleon.eu.com
NTP Server | Time Server | NTP Time Server
United States Naval Observatory - Wikipedia
The Thorny Problem of Keeping the Internet's Time | The New Yorker
United States Naval Observatory - Wikipedia
Atomic Clock Systems - TimeTools Atomic Clock Systems | TimeTools Ltd
Network Time Protocol - an overview | ScienceDirect Topics
NTP Server | atomic-clock.galleon.eu.com
NTP basic – how it works | TIMING AND FREQUENCY SOLUTIONS FOR CRITICAL SYSTEMS
The Clock(s) at the Center of the Universe - xyHt
USNO's Precise Time services
Where Time Begins - Long Now
What You Need to Know About NTP Security - PCI DSS GUIDE
The Thorny Problem of Keeping the Internet's Time | The New Yorker
N95- 32329 Network Time Synchronization Servers at the U. S. Naval Observatory
National Institute of Standards and Technology | NIST
The USNO Master Clock
PDF) Practical Limitations of NTP Time Transfer
The U.S. Naval Observatory Master Clock | The DC Bike Blogger
Knowledge Center
The Clock(s) at the Center of the Universe - xyHt
United States Naval Observatory - Wikipedia
