| 摘要 |
PURPOSE:To surely prevent wrong use of prepaid cards so that the greatest effect of using these cards can be achieved by irreversibly recording the data on the amount of money usable for a play or on the amount already paid. CONSTITUTION:The prepaid card 120 is a plastic card of the same size as that of a magnetic card such as a credit card. On its surface 122, there are a printed part 124 where the number of possible games to play, logotypes of a credit card company, etc., are printed, and a data memory part 126. An optical fiber postscript type memory is adopted for the data memory part 126, and on the data memory layer, data on the amount of money to be recorded on the prepaid card 120 are recorded by a physical change, pit forming, as irreversible data. |
