| 摘要 |
<p>PURPOSE: To prevent illegal forgery by arranging a remainder code area in a specified shape to write the value information for plural digits for every digit along the sides of the card and writing the information with a start position to be decided by ciphered information as the reference. CONSTITUTION: The same digit recording areas 17a-17d of remainder code area 17 on a main body 1 of the prepaid card are provided with respectively different outer peripheral shapes composed of plural curved lines, and arranged along sides 13 of the main body 1 of the prepaid card. When a two-dimensional recording code is composed of a code expressed by four bits, for example, the same digit recording area is allocated for every digit and information 18 showing the shop, where amount playing processing is performed by the prepaid card, and its date and time is written. Further, the value information written in these same digit recording areas 17a-17d while being separated for every digit of each unit data is written with the start position, which is ciphered and decided by start position information corresponding to key information 23 in an invisible record writing area 22, as the reference.</p> |
