The present invention extends to methods, systems, and computer program products for a joining node to join a ring of nodes within a rendezvous federation. Authorization checking devices are allocated to the storage devices and grant access to at least some of the personal data stored in the storage devices only in the event of a positive authorization andor authentication. The radial extent of circumferentially adjacent openings of the first group of opening and of the second group of openings overlap each other in the radial direction at the ends facing way from their associated edge areas or extend along approximately the same radial area. The scripting driver exports a set of objects whose functions can be called by the driver script to communicate with and control the device.