| 摘要 |
PROBLEM TO BE SOLVED: To provide the masking process of a document file capable of easily achieving a state that while an unauthorized person is not able to grasp the content of a printed-out (or image-output) document after masking, an authorized person or a permitted person concerned is able to grasp the content, the control program of the process, and a computer system mounted with the control program.SOLUTION: When a masking server (computer system mounted with a control program) receives a printout request of a document or the like by a user via a client computer in the case of performing masking, the computer system automatically generates a masking rule based on random numbers each time, and executes a masking operation in accordance with the masking rule.SELECTED DRAWING: Figure 6 |
