Ex parte HYATT et al. - Page 2

          Appeal No. 95-0143                                                          
          Application 07/865,849                                                      

          security systems in which access to a lock is granted through               
          passing of appropriate data from an electronic key to an                    
          electronic lock.                                                            
               Independent claims 1, 10 and 17 are reproduced as follows:             
               1.  An electronic security system, comprising:                         
               a lock, including                                                      
               a lock memory storing therein an identification number of              
          said lock, an encryption code associated with said lock, and a              
          seed number, and                                                            
               means for encrypting said stored seed number with said                 
          encryption code to generate an encrypted seed number;                       
               key means couple with said lock for communicating therewith,           
               a key memory storing therein a list of lock identification             
          numbers and corresponding encryption codes,                                 
               means for receiving said identification number of said lock            
          and said seed number from said lock,                                        
               means for encrypting said received seed number with an                 
          encryption code retrieved from said key memory corresponding to             
          said received identification number to generate an encrypted seed           
          number, and                                                                 
               means for transmitting said encrypted seed number to said              
               said lock further including                                            
               means for comparing said encrypted seed number received from           
          said key means with the encrypted seed number generated in said             
          lock, and                                                                   


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Last modified: November 3, 2007