4 ms·
The simplest defeat is to require the key ping round trip to complete in N microseconds, where N is sufficiently low. Researchers have demostrated that this is
by TwoBit 11y ago
The simplest defeat is to require the key ping round trip to complete in N microseconds, where N is sufficiently low. Researchers have demostrated that this is a practical solution.
- nroets 11y agoTheoretically, a attacker can transmit an amplified message 300 m in 1 microsecond. So the car must limit the RTT to only a few dozen nanoseconds. This is fairly easy with modern electronics.
- maxerickson 11y agoA good search term is distance bounding protocol. Wikipedia has an article with links to research: https://en.wikipedia.org/wiki/Distance-bounding_protocol https://en.wikipedia.org/wiki/Distance-bounding_protocol