Russia installed a radio-jammer that interferes with the signals that direct GPS-guided munitions. Last week, Ukraine blew it up ... with a GPS-guided bomb.
I bet the jammers were unsophisticated enough you could just program the GPS to continue moving in the direction where the over the air noise levels kept increasing.
As another commenter said, I don’t think cryptography is the main problem.
You’ve got to be able to modulate some numbers out of the radio signal first before you need to be concerned if it’s encrypted or not.
GPS signals from power conserving satellites are so weak that I’d imagine that overwhelming them with noise on all frequencies would be the easy answer. (Although there’s a Big Brain hyper-cunning answer to that…).
Some GPS jammers are known to transmit, instead of noise, a bad signal which creates an offset in the timing to calculate a false position. But with encrypted military GPS, that’s not as effective.
I bet the jammers were unsophisticated enough you could just program the GPS to continue moving in the direction where the over the air noise levels kept increasing.
The bombs were probably using the encrypted military GPS frequencies that are more resistant to jamming.
As another commenter said, I don’t think cryptography is the main problem.
You’ve got to be able to modulate some numbers out of the radio signal first before you need to be concerned if it’s encrypted or not.
GPS signals from power conserving satellites are so weak that I’d imagine that overwhelming them with noise on all frequencies would be the easy answer. (Although there’s a Big Brain hyper-cunning answer to that…).
Some GPS jammers are known to transmit, instead of noise, a bad signal which creates an offset in the timing to calculate a false position. But with encrypted military GPS, that’s not as effective.