Ex parte HYATT et al. - Page 10

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

               Pogue further teaches in column 2, lines 56-66, that these             
          objectives are accomplished by a method in which the key only               
          stores a secret key number and a unique key ID.  In column 2,               
          line 67, through column 4, line 63, Pogue teaches the                       
          initialization mode which allows a single key to operate with an            
          unlimited number of locks.  The initialization mode is only done            
          once to introduce the key to a lock.  During the initialization             
          mode, information Q is determined by encrypting the key’s secret            
          key, S, by a private key P and the key’s ID is transfered to the            
          lock.  The key does not store the private key, P, but only stores           
          the secret key, S, and the key’s ID.  The lock stores the key’s             
          ID, the private key, P, and information Q where Q=P(S).  Pogue              
          teaches in column 4, lines 64-67, that this process allows the              
          key to only store the secret key, S, and its ID.                            
               In column 5, lines 9-23, Pogue teaches the authentication              
          method as diagrammed in Figure 4.  To start this mode, the lock             
          wakes up the key by sending out key IDs.  If one of the key IDs             
          matches the key’s ID stored in the key, the key sends a reply.              
          Upon receiving a reply, the lock enters into the authentication             
          mode to verify that the key is an authorized unit.  During this             
          mode, the lock sends a random number R and the Q which                      
          corresponds to the ID which was matched in the key.  The key                


Page:  Previous  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  Next 

Last modified: November 3, 2007