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c DS1207 DS1207 TimeKey FEATURES PIN ASSIGNMENT • Cannot be deciphered by reverse engineering • Time allotment from one day to 512 days for trial periods, rentals, and leasing DALLAS DS1207 TimeKey • Partitioned memory thwarts pirating • User-insertable possession packaging allows personal • Exclusive blank keys on request • Appropriate identification can be made with a 64-bit reprogrammable memory SIDE • Unreadable 64-bit match code virtually prevents discovery by exhaustive search with over 1019 possibilities obscures real accesses 1 • Random data generation on incorrect match codes • 384 bits of secure read/write memory create additiona...

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