One technique apparently used is signal-boosting. PKI wouldn't fix this. You'd need to do one of three things: 1) Stop fobs from automatically sending out sign

One technique apparently used is signal-boosting. PKI wouldn't fix this. You'd need to do one of three things: 1) Stop fobs from automatically sending out signals without user intervention (but people like convenience) 2) Put fobs in a Faraday cage 3) Add some sort of geolocation to fobs that will stop the car from starting if the key is too far away