| 摘要 |
PROBLEM TO BE SOLVED: To protect security of document having security setting such as encrypted data without deteriorating convenience of reprint in an image forming apparatus in which reprint is performed using expanded image data piled up in a storage device after printing.SOLUTION: It is determined whether print data receiving a print request has security setting. If the print data has the security setting, expanded image data are encrypted using authentication information that is input in printing. The encrypted image data are accumulated by correlating them with history information. In reprint, input of the authentication information is received again, and only when authentication succeeds, the reprint is permitted. |
