The difference is that in IT, whether you are a professional or not, the systems you’re working on will still ask you for authentication. In cars, it’s securit

The difference is that in IT, whether you are a professional or not, the systems you’re working on will still ask you for authentication. In cars, it’s security by obscurity. If you know the protocol to talk to the car’s computers via the OBD port, you are pretty much root without even providing any credentials.