Hardening Accurate Timing Receivers Against Low-cost 1PPS Spoofing

Yoav Zangvil

Abstract:	In contrary to popular belief, accurate 1PPS Spoofing can be accomplished using inexpensive hardware and open source software, cutting out the dependency on high-end and costly RF simulators. Using a $100 GPS disciplined oscillator, a slow drift of the clock with perfect 1PPS alignment was demonstrated on a receiver used for timing and synchronization of telecommunication networks. The research exposes a vulnerability that can be exploited by hackers to disrupt networks and services. In addition, the presentation offers a set of best practices against effective low-cost attacks that go beyond the common security measures implemented in RF simulators.
Published in:	Proceedings of the 52nd Annual Precise Time and Time Interval Systems and Applications Meeting January 25 - 28, 2021
Pages:	1 - 20
Cite this article:	Zangvil, Yoav, "Hardening Accurate Timing Receivers Against Low-cost 1PPS Spoofing," Proceedings of the 52nd Annual Precise Time and Time Interval Systems and Applications Meeting, January 2021, pp. 1-20. https://doi.org/10.33012/2021.17771
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