| 主权项 |
1. An authentication system configured to authenticate an operation terminal used for maintaining an electronic control unit (ECU) controlling operation of a vehicle, the authentication system comprising:
an authentication apparatus connected to the operation terminal through a communication line and configured to authenticate an operator operating the operation terminal; and the ECU, wherein the ECU is configured to determine whether or not to permit the operation terminal to carry out operation for maintaining the ECU, each of the authentication apparatus and the ECU includes:
a changing code generation source configured to generate a changing code synchronized to each other;a storage unit configured to store a common key unique to the vehicle and shared between the authentication apparatus and the ECU; and an authentication code generator configured to generate an authentication code by using the changing code and the common key, the authentication apparatus authenticates the operator upon receiving an authentication request from the operation terminal, once an authentication of the operator is successful, acquires information specifying the common key from the operation terminal, generates the authentication code by using the changing code and the common key and sends the authentication code to the operation terminal, the operation terminal sends the authentication code received from the authentication apparatus to the ECU, and the ECU generates the authentication code by using the changing code and the common key, and in a case where the authentication code having been generated and the authentication code having been received from the operation terminal do not match with each other, permits the operation terminal to carry out the operation for maintaining the ECU. |
