I think I understand what is being suggested here, but aren't military GPS signals encrypted? Wonder how difficult that would be to 'crack'?
I believe that extended accuracy info is encrypted. But if the signal-to-noise ratio is bad and it's getting garbage on the encrypted part but they were jamming it with viable coarse nav data, then the UAV just did the best it could with the data it had.
We are so far ahead we don't seem to be looking over our own shoulders.
with 256 bit encryption it would be practically uncrackable
in real time.
Most likely, not very due to the nature of GPS it Broadcasts same signal to every device, thus every device should have the same key to decrypt it. Since the data is very short to begin with,and the GPS system design is decades old,my bet is that it was not hard to either crack the key, or retrieve it from some Mil device. Unless they are using the Public-key crypto to authenticate the transmitter. However, its unlikely, because the system was build long time ago and designed for not very sophisticated receivers.