Kyle Wesson (The University of Texas at Austin), “Secure Navigation and Timing without Storage of Local Keys”, Prof. Brian Evans and Prof. Todd Humphreys, (2014)
Civil Global Navigation Satellite Systems (GNSS) such as the Global Positioning System (GPS) broadcast unencrypted signals worldwide according to an open-access standard. The transparency and predictability of these signals render them easy to counterfeit, or spoof.