Researchers in Austin Radionavigation Lab successfully showed that an unmanned drone with an unencrypted GPS system can be hijacked with GPS spoofing device.
U.S. Department of Homeland Security (DHS) wanted to see if anyone had the capability to pull this off and invited scientists to show their skills. What the scientists did was to matched-GPS-signal-structure of the transmission and interfere in an attempt to control the receiver. This spoofer can transmit its counterfeit signals from a stand-off distance of several hundred meters or it can be co-located with its victim.
The UT researchers took equipment costing about $1000 to the White Sands Missile Range in New Mexico last week and showed observers from both the Federal Aviation Administration (FAA) and DHS how control of a test drone could be taken away from its original overseers.
Considering that hundreds of drones will be flying in the USA within the next decade, the ability to easily spoof them is a bit disconcerting. Of course since similar technology can be used on other vehicles that deploy unencrypted GPS navigation such as planes, ships, etc..