Apparatus and method for authenticating authorization of person using vehicle

The invention relates to a device (2) and a method for authenticating the authorization of a person using a vehicle (1). A Bluetooth radio link (BF) is established between a portable handset (5) and exactly one of a plurality of nodes (4.1 to 4. N) connected to a control unit (3). Furthermore, an ultra-wideband short-range radio link (UF) is established between the handset (5) and the control unit (3), by means of the control unit (3), upon detection of an authorization transmitted from the handset (5) via the Bluetooth radio link (BF), the handset (5) is authenticated as authorization, and the position of the handset (5) is determined on the basis of a communication with the handset (5) via the ultra-wideband short-range radio link (UF). The connection quality of possible Bluetooth radio links (BF) between the handset (5) and the nodes (4.1 to 4. N) is determined as a function of the location of the handset (5), and then, if the Bluetooth radio link (BF) to one of the nodes (4.1 to 4. N) has a higher connect