The analogy breaks down a little here. We don’t want the dealership to keep the key, but we do want them to give us a new one if we lose it. So afaik we trust

The analogy breaks down a little here. We don’t want the dealership to keep the key, but we do want them to give us a new one if we lose it. So afaik we trust the manufacturer to keep the info, and to keep sufficient logs that anyone that abuses it to steal cars can be caught. I don’t think the way this is works can be extended to communications apps though.