Authentication of a user provided with a mobile device by a vehicle

A method for pre-authentication of a user by a vehicle with a view enabling the access of the user to the vehicle during the actuation of a handle disposed on an access opening of said vehicle, said user being provided with a mobile device, said vehicle and said mobile device each comprising a wireless communications interface, said method comprising:

• a first step in which one of said interfaces goes from an “advertizing” state to a “scanning” state in which said interface searches within its environment for the presence of an interface, for a period of time equal to at least the basic transmission period of the other interface, said other interface transmitting a set of data comprising the information on availability of said service for accessing the vehicle, said passage from the “advertizing” state to the “scanning” state taking place over a predetermined period (Ps);
• a second step in which, if the interface in the “scanning” state identifies the presence of the other interface in the “advertizing” state, the interface in the “scanning” state goes into an “initiation” state in which it requests from the identified interface the establishment of a connection;
• a third step in which the interfaces of the vehicle and of the mobile device go into the “connected” state in which they can exchange data;
• a fourth step in which the vehicle sends, via the interface, a request for authentication to the interface of the mobile device;
• a fifth step in which the mobile device sends, via the interface, a data frame containing its response to the authentication request to the interface of the vehicle, said data frame also comprising identity data for the mobile device;
• a sixth step in which the vehicle verifies the coherence of the authentication response sent by the mobile device;
• a seventh step in which the vehicle stores the identity data for the mobile device, if the authentication response sent by the mobile device is coherent;
• an eighth step in which the interfaces of the vehicle and of the mobile device go back into the “advertizing” state;
• a ninth step in which, when the handle of the access opening of the vehicle is actuated, the interface of the vehicle goes from the “advertizing” state to the “scanning” state;
• a tenth step in which the interface in the “scanning” state validates the presence of the interface of the mobile device in the “advertizing” state by receiving a data frame transmitted by the interface of the mobile device comprising, amongst others, the stored identity data, and allows the access to the vehicle by unlocking said access opening,
• wherein each of the interfaces of the vehicle and the mobile device is a wireless communications interface according to the Bluetooth® Low Energy (BLE) protocol, where each of said interfaces adopts at least one state from the group of states consisting of:
• “standby”, “advertizing”, “scanning”, “initiation”, “connected”, each of said interfaces being initially in the “advertising” state in which each of said interfaces transmits, for a basic transmission period, a set of data comprising at least identity data and information on availability of a service for accessing the vehicle.