Memos

The information in this section was originally hosted on the University of Delaware homepage for Professor David L. Mills, PhD. While much of it can be considered historical, it provides an overview of the design principles for NTP and related time synchronization technology.

Memos

Title Publication Date Format
Suggestions for Protocol and Security Enhancements for the Network Time Protocol July 22, 2023 HTML
Interplanetary Internet (IPN) June 4, 2001 TXT
Public-Key Cryptography for the Network Time Protocol Version 1 (Internet Draft) April, 2001 TXT
PPS Signal Transfer via Broadcast Television Stations January 1, 2001 TXT
A Brief History of NTP Time: Confessions of an Internet Timekeeper August 1, 2000 TXT
Public-Key Cryptography for the Network Time Protocol Version 1 (Internet Draft) June, 2000 TXT
Pulse-Per-Second API for UNIX-like Operating Systems, Version 1.0 (Internet Draft) August 17, 1999 TXT
Authentication Scheme Extensions to NTP (Internet Draft) September 1, 1998 TXT
A Kernel Model for Precision Timekeeping January 31, 1996 PDF
A Kernel Programming Interface for Precision Time Signals January 31, 1996 PDF
Time and Time Interval Measurement with Application to Computer and Network Performance Evaluation January 31, 1996 PDF
A Comparison of Certain Timekeeping Systems and the Network Time Protocol May 19, 1991 PDF