| 摘要 |
<p>PURPOSE:To easily discriminate an incorrect rewriting of data by observing visually only visible data area. CONSTITUTION:An invisible data area 11 capable of rewriting invisible data which can not be observed visually and a visible data area 12 capable of rewriting visible data which can be observed visually are provided. In the visible data area 12, a first visible data 2 the same as an invisible data 1 and a second visible data 4 obtained by giving a predetermined operation to the invisible data 1 are displayed.</p> |
