Military Global Positioning System (GPS) signals have long been encrypted to prevent counterfeiting and unauthorized use. Civil GPS signals, on the other hand, were designed as an open standard, freely-accessible to all. These virtues have made civil GPS enormously popular, but the transparency and predictability of its signals give rise to a dangerous weakness: they can be easily counterfeited, or spoofed. Like Monopoly money, civil GPS signals have a detailed structure but no built-in protection against counterfeiting. Civil GPS is the most popular unauthenticated protocol in the world.
The vulnerability of civil GPS to spoofing has serious implications for civil unmanned aerial vehicles, or UAVs. This was demonstrated in June, 2012 by a dramatic remote hijacking of a UAV at White Sands Missile Range. The demonstration was conducted by the University of Texas Radionavigation Laboratory at the invitation of the Department of Homeland Security.
Dr. Todd Humphrey's testimony to Congress in July 2012 that outlines his recommendations based on these successful tests is available here: bit.ly/1am0uV8
To learn more about civil GPS spoofing and anti-spoofing, please visit the UT Radionavigation Lab website: radionavlab.ae.....
21 окт 2024