The present application relates to a user/vehicle-identification (ID) by which access rights privileges and or user settings can be associated to a specific user assigned to a specific vehicle (e.g. driver). In particular, the application relates to using a user/vehicle-ID stored in a car key remote control for associating access rights privileges and or user settings which have a relation to the vehicle, identified by the vehicle ID, to the user of the car key remote control. A system for authentication of a user of a vehicle (1400) is described. The system comprises an identification (ID) device (100) adapted to store an user/vehicle ID string, wherein the user/vehicle ID string identifies the user of the vehicle and the associated vehicle (1400); and an authentication device (1200) adapted to receive the user/vehicle ID string from the ID device (100), and to associate access rights, privileges and or user settings to the user of the ID device (100), when the user/vehicle ID has been verified.