Method for pre-authenticating a user with a vehicle in order for the user to access the vehicle upon the actuation of a handle disposed on an opening of said vehicle, said user being equipped with a mobile device, said vehicle and said mobile device each comprising a wireless communication interface (I1, I2) based on the Bluetooth® Low Energy protocol, each of said interfaces (I1, I2) being able to adopt at least one state out of the following states: "standby", "notification", "scanning", "initiation", "connected"; each of said interfaces (I1, I2) being initially in the "notification" state in which each of said interfaces (I1, I2) transmits, according to a basic transmission period, a set of data comprising, among other things, identity data and information on availability of a vehicle access service; said method comprising: - a first step in which one of said interfaces (I1, I2) switches from the "notification" state to the "scanning" state in which said interface (I1, I2) searches in its environment for the presence of an interface, for a period at least equal to the basic transmission period of the other interface (I1, I2), said other interface transmitting a set of data comprising information on availability of said vehicle access service, said switch from the "notification" state to the "scanning" state being done according to a predetermined period (Ps); - a second step in which, if the interface (I1, I2) in the "scanning" state identifies the presence of the other interface (I1, I2) in the "notification" state, the interface (I1, I2) in the "scanning" state switches to an "initiation" state in which it asks the identified interface to set up a connection; - a third step in which the interfaces (I1, I2) of the vehicle and of the mobile device switch to the "connected" state in which they can exchange data; - a fourth step in which the vehicle sends, by means of the interface and to the interface of the mobile device, an authentication request; - a fifth step in which the mobile device sends, by means of the interface and to the interface of the vehicle, a data frame containing its response to the authentication request, said data frame also comprising identity data of the mobile device; - a sixth step in which the vehicle checks the consistency of the authentication response sent by the mobile device; - a seventh step in which the vehicle stores the identity data from the mobile device if the authentication response sent by the mobile device is consistent; - an eighth step in which the interfaces (I1, I2) of the vehicle and of the mobile device switch back to the "notification" state; - a ninth step in which, when the handle of the opening of the vehicle is actuated, the interface of the vehicle switches from the "notification" 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 "notification" state by reception of a data frame transmitted by the interface of the mobile device comprising, among other things, the stored identity data, and authorizes the access to the vehicle by unlocking said opening. - a first step in which one of said interfaces (I1, I2) switches from the "notification" state to the "scanning" state in which said interface (I1, I2) searches in its environment for the presence of an interface, for a period at least equal to the basic transmission period of the other interface (I1, I2), said other interface transmitting a set of data comprising information on availability of said vehicle access service, said switch from the "notification" state to the "scanning" state being done according to a predetermined period (Ps); - a second step in which, if the interface (I1, I2) in the "scanning" state identifies the presence of the other interface (I1, I2) in the "notification" state, the interface (I1, I2) in the "scanning" state switches to an "initiation" state in which it asks the identified interface to set up a connection; - a third step in which the interfaces (I1, I2) of the vehicle and of the mobile device switch to the "connected" state in which they can exchange data; - a fourth step in which the vehicle sends, by means of the interface and to the interface of the mobile device, an authentication request; - a fifth step in which the mobile device sends, by means of the interface and to the interface of the vehicle, a data frame containing its response to the authentication request, said data frame also comprising identity data of the mobile device; - a sixth step in which the vehicle checks the consistency of the authentication response sent by the mobile device; - a seventh step in which the vehicle stores the identity data from the mobile device if the authentication response sent by the mobile device is consistent; - an eighth step in which the interfaces (I1, I2) of the vehicle and of the mobile device switch back to the "notification" state; - a ninth step in which, when the handle of the opening of the vehicle is actuated, the interface of the vehicle switches from the "notification" 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 "notification" state by reception of a data frame transmitted by the interface of the mobile device comprising, among other things, the stored identity data, and authorizes the access to the vehicle by unlocking said opening.