Abstract: Disclosed is a system for managing a service linked to the use, by a user, of a vehicle belonging to an owner different from the user. The system includes: a box on-board the vehicle; a unit for identifying the user; an on-board application; and remote server including: a unit for collecting sharing data, notably from the application and notably the identity of the user, a unit for collecting service data, notably from a supplier, a unit for reconciling sharing data and service data, and a unit for sharing the cost of the service between the user and the owner.

Abstract: A device for authorizing use of a vehicle, that comprises a cable for connection to an accreditation device of the vehicle, a memory for saving identification parameters of a key for enabling the vehicle and a detector for detecting a presence of a user. The device is configured to identify whether the detected user is an authorized user and, if so, to communicate via the cable with the accreditation device to authorize use of the key to enable the vehicle.

Abstract: Device (11) for authorizing the use of a vehicle (2), comprising: means (12) of connection to means (4) pertaining to the vehicle, for accrediting ignition keys, preferably via a CAN software bus (12), preferably accessible via an OBD port (9); memory means for saving identification parameters of a shares key (6); means (13, 14) for identifying the presence of an authorized user (3); and means for authorizing said user to use the shared key.