Method for identifying and authenticating a user profile for the use of services onboard a motor vehicle

A method for identifying and authenticating a user profile, making it possible to use connected services on a multimedia system on board a motor vehicle, the multimedia system comprising an on-board memory in which a user profile for a portable device is stored, the vehicle comprising a first device for communicating with a remote server, the remote server comprising a storage memory and a second system for communicating with the portable device, the portable device comprising a storage memory, wherein the identification and authentication method comprises:

• a step of detection by the multimedia system of a presence of a portable device in the vehicle;
• when a portable device is detected, the method comprises:
• a step of reception by the multimedia system of the vehicle of authentication information of the user of the detected device stored on the detected portable device,
• a step of sending by the multimedia system the authentication information of the user of the detected portable device to the remote server,
• a step of verification, on the remote server, of the authentication information of the user of the detected portable device,
• when the user authentication information matches the identification information of a user recorded in the storage memory of the remote server and previously received by the remote server via the second communication system, then the method comprises:
• a step of reception by the multimedia system of a confirmation of the use of the user profile stored on the multimedia device.