Access authorization by means of personal access module

An apparatus for authenticating users on a packaging industrial system comprising at least two operator interfaces, wherein the apparatus comprising a memory with user log-in credentials for the at least two operator interfaces, wherein the login credentials for the operator interfaces are different from one another, wherein the memory can be activated for a period of time, wherein the apparatus has a detection device which can be detected when the user is within a predefined spatial range around the operator interfaces, wherein apparatus comprising a connection device via which a connection can be established between the apparatus and the operator interfaces when the user is detected by the detection device in the area belonging to an operator interface, wherein the user can be authenticated at the operator interface by the login credentials stored on the memory for the operator interface, wherein the login credentials stored on the memory are managed via synchronisation with a central rights management, and wherein the activation of the memory is blocked if the synchronisation with the central rights management has not taken place for a predefined period of time.