| 摘要 |
The image of a document is depicted on a sheet of paper together with a background pattern image expressing a password, and the password is notified to a person having authority to duplicate the document. A requestor requesting duplication of the document is caused to enter a password (# 104 ), and the document image and the background pattern image are obtained by scanning the sheet (# 101 ). Then, it is determined whether the requestor has the above-described authority, based on the entered password and the password expressed by the obtained background pattern image (# 105 ). When it is determined that the requestor has the authority, a different password is issued. The document image is printed on a separate sheet of paper together with a background pattern image expressing the different password, and the different password is notified to a person having authority to duplicate the document printed on the separate sheet of paper.
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