Disclosed is a data processing system for processing object data of a plurality of standard entities (101). Object identification data (100) and user data (110) can be separately stored and retrieved in the object database (20) such that no correlation between the object identification data (100) and the user data (110) can be deduced exclusively from the stored data records. At least one input device is provided which makes it possible to access the object identification data (100) of the associated standard entity and the relevant user data (100) when a security key assigned to the standard entities (101) is entered, said security key or part thereof remaining with the standard entity (101), the recovery entity, and other optional entities (50, 60) designated by the standard entity.