Method for controlling a vehicle, said control method comprising a step of implementing a first mode of operation of the vehicle for which the vehicle operates at least partially, the first mode of operation being associated with an operating state (Ef) of the vehicle authorizing said implementation of the first mode of operation, said method comprises: - a step of periodic monitoring of the occurrence of an event (Ev_1) during the step of implementing the first operating mode to detect the event (Ev_1), - a step of modification of the operating state (Ef), triggered by the detection of the event (Ev_1), to authorize the activation of a second mode of operation of the vehicle associated with the modified operating state (Ef), - a step of activation of the second operating mode of the vehicle authorized by the modified operating state (Ef) and in that the vehicle comprises a first computer providing at least one service during the step of implementing the first mode of operation and a second computer ensuring the management of the vehicle, and in that the monitoring step comprises: - a periodic sending (E101-1), preferably at regular intervals, of a first message by the first computer to the second computer, - each time a first message is received by the second computer, a sending (E101-2) of a second message sent by the second computer to the first computer, - upon each reception of a second message by the first computer, processing (E101-3) of said second message by the first computer triggering the implementation of step modification of the operating state (Ef) when the second message indicates that the event (Ev_1) has occurred, characterized in that each first message M1 comprising a random seed generated by the first computer 103, when the second calculator 104 receives the first message M1, it uses the random seed contained in the first message M1 to generate an encrypted key forming information to be sent to the first calculator 103 via a second corresponding message M2. - a step of periodic monitoring of the occurrence of an event (Ev_1) during the step of implementing the first operating mode to detect the event (Ev_1), - a step of modification of the operating state (Ef), triggered by the detection of the event (Ev_1), to authorize the activation of a second mode of operation of the vehicle associated with the modified operating state (Ef), - a step of activation of the second operating mode of the vehicle authorized by the modified operating state (Ef) - a periodic sending (E101-1), preferably at regular intervals, of a first message by the first computer to the second computer, - each time a first message is received by the second computer, a sending (E101-2) of a second message sent by the second computer to the first computer, - upon each reception of a second message by the first computer, processing (E101-3) of said second message by the first computer triggering the implementation of step modification of the operating state (Ef) when the second message indicates that the event (Ev_1) has occurred, characterized in that each first message M1 comprising a random seed generated by the first computer 103, when the second calculator 104 receives the first message M1, it uses the random seed contained in the first message M1 to generate an encrypted key forming information to be sent to the first calculator 103 via a second corresponding message M2.