Patent ID: 8526912

Claim:
A method for authentication of a user at an access device by means of a cellular mobile radio network comprising a base station defining a mobile radio cell with a unique identifier, the method comprising the steps of: giving access via an access device to a facility or a service different from the mobile radio network booking a mobile radio terminal having a unique identifier into the mobile radio network via said base station, carrying out an authentication by means of the identifier of the mobile radio cell and the identifier of the mobile radio terminal, providing the base station at the location of the access device so that the access device has its own mobile radio cell serviced by the base station, defining with this mobile radio cell an authentication cell of the mobile radio network, booking the mobile radio terminal into the mobile radio network via said base station of said authentication cell for the purpose of authentication at the access device and then sending the identifiers to an authentication entity that checks whether the user is permitted to access at the access device, granting or denying access depending on the permission of the user, requesting the user to make a user input or provide identification data that are contactlessly transmitted to the access or another device, and for authentication verifying the user input or identification data.