US Patent 9464905 Over-the-air vehicle systems updating and associate security protocols

A method of updating a vehicle ECU includes establishing communication between a data communications module of a vehicle and an update server via a cellular network; validating the vehicle using a key exchange protocol between the data communications module and the update server; and sending update information from the update server to the data communications module of the vehicle via the cellular network, the update information configured to be used to update the vehicle ECU.