System for controlling the execution of a program or the like

摘要

A system for controlling the execution of a program or the like by a computer connected to a network is described. The system comprises a number of local controlling devices secured against unauthorized access, each of the devices being connected to a corresponding computer. Each of the devices comprises a processor, an address and means for communicating with the corresponding computer. The system further comprises a central control unit connected to the network and comprising means for communicating with each of the local control devices through the network. The control unit can forward an entitlement message to each of the local control devices, the entitlement message containing entitlement information regarding the use of the program. Each of the local control devices controls the use of the program in accordance with said entitlement information.