Ex parte HRUSKA et al. - Page 2




          Appeal No. 1997-2158                                       Page 2           
          Application No. 08/234,239                                                  


                                     BACKGROUND                                       
               The invention at issue in this appeal relates to validity              
          checking in a computer network.  Validity checking examines                 
          data from a computer program to learn if unwanted instructions              
          are present.  Such checking may detect a computer virus before              
          it is executed.                                                             


               In a computer network, each workstation may include its                
          own validity checking software.  Upon boot-up, each                         
          workstation runs its software to check for instructions                     
          indicative of a virus.  Such an arrangement occupies memory                 
          space in each workstation.  Updating validity checking program              
          files and data files is laborious, moreover, because each                   
          workstation must be updated.                                                


               The invention employs networked workstations and a server              
          to conduct validity checking without the aforementioned memory              
          capacity and updating problems.  Specifically, one of the                   
          workstations copies a computer program that requires checking               
          to the server.  The server runs software to check for                       
          instructions indicative of a virus and reports the results of               







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