Authentication system and authentication method

1. An authentication system, comprising:

a terminal;

a key authentication unit arranged in a vehicle that communicates with the terminal, wherein the key authentication unit receives key information of the terminal carried by a user through wireless communication and performs key authentication that verifies authenticity of the key information;

detectors that are arranged at different locations and detect biological information of the user;

a biometric authentication unit that uses the biological information to perform biometric authentication;

a terminal position detector that detects a terminal position relative to the vehicle based on a parameter obtained from radio waves transmitted and received between the terminal and the vehicle during the key authentication; and

a controller that controls actuation of the vehicle based on a location of one of the detectors that detected the biological information, the terminal position, an authentication result of the key authentication, and an authentication result of the biometric authentication,

wherein the terminal position detector detects whether the terminal is located at a driver seat side or a passenger seat side of the vehicle, or whether the terminal is located at a front side or a rear side of the vehicle, and

wherein the controller permits the actuation of the vehicle only when the key information used in the key authentication and the biological information used in the biometric authentication have been associated with each other in advance.

2. The authentication system according to claim 1 , wherein the detectors are arranged inside and outside the vehicle.

3. The authentication system according to claim 1 , wherein

the detectors include an exterior detector, which is arranged outside a passenger compartment of the vehicle, and an interior detector, which is arranged inside the passenger compartment of the vehicle,

the controller permits or performs locking or unlocking of a door of the vehicle if the key authentication is accomplished when the biometric authentication is accomplished with the biological information detected by the exterior detector, and

the controller permits or performs starting of an engine of the vehicle if the key authentication is accomplished when the biometric authentication is accomplished with the biological information detected by the interior detector.

4. An authentication method, comprising:

transmitting key information of a terminal carried by a user to a vehicle and performing key authentication that verifies authenticity of the key information;

detecting biological information of the user with at least one of detectors arranged at different locations;

performing biometric authentication using the biological information;

detecting a terminal position relative to the vehicle based on a parameter obtained from radio waves transmitted and received between the terminal and the vehicle during the key authentication; and

controlling actuation of the vehicle based on a location of one of the detectors that detected the biological information, the terminal position, an authentication result of the key authentication, and an authentication result of the biometric authentication,

wherein the detecting a terminal position includes whether the terminal is located at a driver seat side or a passenger seat side of the vehicle, or whether the terminal is located at a front side or a rear side of the vehicle, and

wherein the controlling of the actuation of the vehicle includes permitting the actuation of the vehicle only when the key information used in the key authentication and the biological information used in the biometric authentication have been associated with each other in advance.