GPS Is Easy to Hack, and the U.S. Has No Backup

#News(General) [ via IoTGroup ]

Achilles heel of modern navigation & synchronisation systems !

GNSS, PTP & NTP continue to be basic sources of Timing sync over various networks used in Telecom, Finance, Aviation, Electric grids etc. Each one having their respective trade-offs based on timing accuracy, number of router hops distance from end client (slave clock), cost, open sky visibility, jamming vunerability & existing infrastructure capability.

The Grandmaster (Reference clock) in all the given cases (NTP, PTP etc) is GNSS(PRC G.811) aided these days to be able to arrest the drift & timing jitter locally.

Its scary to know that it is not difficult for hackers to break in and throw off the GNSS timing, with potentially harmful consequences.

Many countries have a ground-based network for backup during an attack, although the U.S. does not !

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