| 摘要 |
PROBLEM TO BE SOLVED: To provide a means which can be inserted in a notebook as a printed matter and conceal valuable information such as password, even in case it happens to be seen by some other person, and can easily allow its bearer peruse the information, whenever he wants to. SOLUTION: In this composite visual effect cryptographic printer, two or more dummy characters are superposed over each other in addition to characters to be coded, and the lattice-like pattern of a decoding sheet is formed. COPYRIGHT: (C)2006,JPO&NCIPI
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