| http://www.w3.org/ns/prov#value | - A method for operating an authentication system which includes an IC card and a terminal unit which receives the IC card, the IC card including a memory, a keypad, and a first timer and the terminal unit including a second timer, said method comprising the steps of:(a) activating the IC card if ID data stored in the memory matches ID data manually entered on the keyboard; (b) deactivating the IC c
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