I don't have any inside knowledge, but presumably the keys and car exchange mess...

		emiliobumachar on April 27, 2013 \| parent \| context \| favorite \| on: Killer escaped prison after being issued picture o... I don't have any inside knowledge, but presumably the keys and car exchange messages and do some crypto signing. For example, the car makes up and sends a random string, the key signs it and sends it back.