| 摘要 |
PURPOSE:To make decoding by a third person an identification number impossible by providing an indicator array in a position depressed from the front, also, changing an input key at every one transaction even in case of inputting the same identification number. CONSTITUTION:An indicator array 7b is constituted by providing an identification number input means provided in a position depressed from the front. At every one transaction, a numeral displayed on the indicator array 7b id different, but since the indicator array 7b is like a circular arc, numerals of adjacent numeral indicators are always continued, and when a card bearer brings the identification number to key input, a display which coincides with the identification number can be found out easily. Also, when the card bearer is inputting the identification number, since the indicator array 7b is in a position depressed from the front, it is invisible from a third person, and also, even when the same identification number is inputted, the input key is different at every one transaction. In such a way, it becomes impossible that a third person decodes the identification number from the input operation of the identification number by the card bearer. |
