Electronic control device for a vehicle

An electronic control device for a vehicle configured to be able to rewrite a program related to a vehicle control by connecting an external device with the vehicle and by accessing an in-vehicle LAN comprising:

• a portable authentication terminal separated from the external device;
• an in-vehicle authentication system connected with the in-vehicle LAN, configured to authenticate the portable authentication terminal and the external device, and configured to be able to transmit each authentication result of the portable authentication terminal and the external device to the in-vehicle LAN;
• a repeater configured to relay communication between the external device and the in-vehicle LAN;
• a repeater powering authorization unit connected to the in-vehicle LAN and configured to authorize powering the repeater by supplying electricity for the repeater if receiving the authentication result of a successful authentication of the portable authentication terminal by the in-vehicle authentication system;
• and
• a communication authorization unit incorporated in the repeater and configured to authorize communication between the in-vehicle LAN and the external device through the repeater if receiving the authentication result of a successful authentication of the external device by the in-vehicle authentication system when powered.

An electronic control device for a vehicle configured to be able to rewrite a program related to a vehicle control by connecting an external device with the vehicle and by accessing an in-vehicle LAN comprising:

• a portable authentication terminal separated from the external device;
• an in-vehicle authentication system configured to be able authenticate the portable authentication terminal and the external device, and configured to authenticate the external device and to transmit an authentication result of the external device to the in-vehicle LAN if succeeding in authenticating the portable authentication terminal;
• and
• a repeater configured to relay communication between the external device and the in-vehicle LAN;
• a repeater communication authorization unit connected to the in-vehicle LAN and configured to authorize the communication between the external device and the in-vehicle LAN through the repeater by powering and activating the repeater if receiving the authentication result of a successful authentication of the external device by the in-vehicle authentication system.