It doesn't have to be that complex. Enough HW crypto support exists in smaller and smaller MCUs. A good enough PSK programmed at the factory would probably be e

It doesn't have to be that complex. Enough HW crypto support exists in smaller and smaller MCUs. A good enough PSK programmed at the factory would probably be enough and that's the only thing that needs to be unique, everything else can be off-the-shelf vehicle-class components and open source. Btw it's "fun fact" and it typically means there is something factual, not just guesswork.