| 摘要 |
PURPOSE:To check the users, by using combined information of questions and answers as information connecting a card and a real possessor, registrating the questions and answers at the first usage of the card, and comparing the registrated answers and the inputted answers after the next usage and succeeding. CONSTITUTION:A card is recorded only with an account number at the issue, and at the fist usage, a secret number is inputted after the card is read. A file of choice of questions and answers is read from a storage area and displayed, then the user selects an answer. After repeating a pluarlity of questions and answers, the secret number, questions and their answers are registrated on the card. When the card is used twice or more, after the content of the card is read and stored, the secret number is checked, the questions are read out from the question file and displayed. When the user inputs the number of choice of answers, the input is compared with the answer read from the card registrated in advance, and when the answers are coincident with the registrated answers, the card is treated as effective for further processing and if discident, an alarm is outputted. |
