![]() As part of his 2019 doctoral thesis at the University of Oxford, he intercepted sensitive communications beamed down to ships and Fortune 500 companies, including crew manifests, passport details and credit card numbers and payments, all with $400 worth of home equipment. ![]() Pavur says this gear has been hacked at least two dozen times in the past decade or so. Visner has argued for years that satellite systems aren’t secure enough, including the ground stations. All 16 infrastructure sectors the US has designated as critical “depend to a great extent, pretty much all of them, on space systems,” says Sam Visner, a former chief of the National Security Agency’s Signals Intelligence programs who’s now vice chair of the Space ISAC. GPS coordinates and space-based relays are an essential component not only of global communications, military operations and weather forecasting, but also of farms, power grids, transportation networks, ATMs and some digital clocks. Almost all of daily life entails some use of satellites.
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