1. A data processing system for secure processing of data objects comprising: memory means for storing ordinary data objects and distinguished data objects, a first field of each distinguished data object including a main memory location of an associated ordinary data object, a second field of said distinguished data object including access right data for said associated ordinary data object; entry means for entering instructions by a user, said instructions having access right data associated therewith, said instructions including a operation field and a field for locating an associated ordinary data object; first processing means, connected to said entry means and said memory means, for processing said ordinary data objects; and second processing means, connected to said memory means, for processing said distinguished data objects, said second processing means including means responsive to an instruction for comparing access rights associated with said instruction with access rights of said distinguished data object associated with said ordinary data object.