| 摘要 |
PURPOSE:To secure the personal code number not to be read out by the third party so as to ensure safety of the personal code number and to execute processing on-line by executing processing only when the personal code number stored on a card coincides with an inputted one. CONSTITUTION:An IC card 21 is provided with a magnetic strip part 22, where a transaction account number, etc, are magnetically stored, and an IC chip 23. The chip 23 consists of a control CPU24, control programs, a rewritable E<2>PROM25 for storing the personal code number, data storage RAM26 and a connector 27. The CPU24 checks whether or not the inputted personal code number to be supplied from a main control part is equal to that which is stored in the E<2>PROM25, and outputs a coincidence signal or dissidence signal in accordance with the compared result. When they are not coincident to each other, a counter counts up and errors are displayed. Thus the third party cannot read out the personal code number; therefore this is a safe system, and can execute processing on-line. |
