| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve security by forging a data file. <P>SOLUTION: A forgery processing unit 100 creates a forged data file Fd by adding position setting data Ps showing the specific position of an image and the data column of an original data file Fo being the object of forgery to the tail of a content data file Fc of the image. The forged data file Fd looks like a normal image file at a glance, and when it is opened by an image browsing program, the image is browsable. A reproduction part 230 of a restoration processing unit 200 presents the image to a user by using a portion of the fie Fc in the file Fd. When the user designates the specific position of the presented image, a designated position Pd is compared with the position setting data Ps in the file content Fd by a position determination part 250, and when both of them are matched, the portion of the file Fo in the file Fd is output as a restoration data file Fr by a file restoration part 220. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
