| 摘要 |
PURPOSE: A burglarproof method using a password registered in a credit card is provided to maintain the safety of a commercial transaction by sensing that a theft or a burglar illegally uses a credit card, and by arresting the theft or the burglar. CONSTITUTION: A user sets up and inputs a password and an inverse password. The user stores the passwords in a database and is on stand-by. In case that the user inserts a card into a terminal and inputs the password, the password is sensed and read from a main control unit of a transaction system. In case that the password is normal, a transaction requested by the user is processed. In case that the password is the inverse password, an alarm signal is outputted from the main control unit of the transaction system.
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