@Guinnessy Car theft is essentially a solved problem: use cryptographic authentication of CAN frames and bury the hardware security module containing the private key so deep in the car that it takes very long to access it. Unfortunately, car companies don't seem very interested in implementing this. At the same time, they are heavily pushing keyless access methods that introduce new vulnerabilities.
https://kentindell.github.io/2023/04/03/can-injection/
This is a detective story about how a car was stolen - and how it uncovered an epidemic of high-tech car theft. It begins with a tweet. In April 2022, my friend Ian Tabor tweeted that vandals had been at his car, pulling apart the headlight and unplugging the cables.