VEHICLE SECURITY DEVICE AND ID CODE MANAGEMENT DEVICE

摘要

A vehicle security device for improving the security level of a vehicle. The vehicle security device (11) is connected to an engine (16) and communicates with a portable device (11). A smart ECU (13) performs a first coded communication to establish mutual authentication with the portable device. An ID code box (14) is connected to the smart ECU, has a first code and a second code, and does not communicate with the portable device. The ID code box performs a second coded communication using the first code to establish a second mutual authentication with the smart ECU. An engine ECU (15) performs a third coded communication using the second code to establish a third mutual authentication with the ID code box. The engine ECU enables the engine to be started when every one of the first, second, and third mutual authentications are established.