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Aren't military drones using the military GPS profile with encrypted messages? Those cannot be easily spoofed, AFAIK.
by atemerev 8y ago
Aren't military drones using the military GPS profile with encrypted messages? Those cannot be easily spoofed, AFAIK.
- jhayward 8y agoFull-blown spoofing, ie, being able to generate a 'valid' sui generis GPS signal is effectively ruled out by encryption. However a replay attack that uses a valid signal received at some other locate re-broadcast at a second place is not affected by encryption. You can imagine lots of clever ways to use a re-broadcast attack to draw a drone off course.
- duxup 8y ago>However a replay attack that uses a valid signal received at some other locate re-broadcast at a second place is not affected by encryption. That seems like a pretty obvious and absurd sort of vulnerability.
- jhayward 8y agoA detailed solution that addresses all of the stakeholder's equities in the PNT space would be welcome. It is, however, a very long-standing issue that has been addressed by some of the best minds in physics and technology, with many billions of dollars available to them. Do you have any suggestions?
- wongarsu 8y agoSure, but one that's almost impossible to defend against it. Any viable defense has to happen on the client side with something like an antenna array to distuingish broadcasts from space from replay attacks, or a clock accurate enough to detect that the broadcasted time is off by dozens of microseconds and thus has to be a replay.
- Causality1 8y agoIran has already used GPS spoofing to force American drones to land or crash onto Iranian territory to be claimed and reverse-engineered.