Patent ID: 8583317

Claim:
An in-vehicle device that relays wireless data communication between an in-vehicle electronic device and a mobile terminal, comprising: a storage unit that stores a PIN code and an in-vehicle device ID that is kept confidential for a user and that is registered one for each vehicle; a first authentication unit that determines whether the in-vehicle device is allowed to be connected to the mobile terminal on the basis of a comparison of the PIN code; a second authentication unit that requests an in-vehicle device ID from the mobile terminal that has been connected through authentication performed by the first authentication unit and that authenticates the mobile terminal by comparing the in-vehicle device ID transmitted from the mobile terminal in response to the request with the in-vehicle device ID registered in the in-vehicle device, wherein the in-vehicle device ID requested from the second authentication unit is allocated to each in-vehicle device; and a data transmission unit that transmits predetermined vehicle data, which is obtained from the in-vehicle electronic device and which indicates a vehicle state, to the mobile terminal that has been authenticated by the second authentication unit.