| 摘要 |
PURPOSE:To provide the practical method and device for inputting password number for which the degree of security is sufficiently high and the input operation of the password number is simplified as well. CONSTITUTION:A password number input device 1 is provided with a control circuit 3, IC card reader/writer 5 connected to the control circuit, ten-key 7 for number input, and display 9. An IC card 13 carried by a user previously stores the plural kinds of password numbers and when the IC card is fed to the reader/writer 5, the control circuit 3 selects one of plural password numbers from the ten-key 7 according to the instruction of the user and displays a message on the display 9 for pressing the input of that number. Next, when the user inputs the number from the ten-keys, the control circuit 3 compares the number with the selected password number and when they are coincident, the control, circuit judges the input of the right password number and permits the operation of operating equipment 15. |
