| 摘要 |
PURPOSE:To prevent the wrong use due to forgery, by updating and recording check data, which indicates the number of times of transaction, on an identification card at every transaction and recording the same data on a customer file to collate this data when transactions are performed with the identification card. CONSTITUTION:On an identification card 4 used for transactions, a branch code, an account number, a key number, a payment limit amount of money, etc. are recorded magnetically in a magnetic stripe MS, and a transaction number D1 is recorded also magnetically. This number D1 is updated at every transaction, and simultaneously, the transaction number D1 or check data having a certain relation to this number is updated and recorded in the customer file, which is provided in a calculating center, each time. Transactions are permitted only when the key number and the key number of check data coincide with each other; but if they do not coincide, an alarm is issued or the card is confiscated. Thus, the wrong use due to forgery is prevented. |
