Abstract: A data processing system for processing object data of a plurality of standard instances (101), where object identification data (100) and user data (110) in the object data database (20) can be stored and retrieved separately from each other so that no relationship between the object identification data (100) and the user data (110) can be derived from the stored data records alone, where at least one input device is provided which, after input of an allocated security code for the standard instance, permits access to the object identification data (100) of the assigned standard instance and to the associated user data (110), and the security code or a part thereof remains with the standard instance (101), with the recovery instance and if necessary with further instances (50, 60) determined by the standard instance.