| 摘要 |
PROBLEM TO BE SOLVED: To provide a system for assuring genuineness of contents and electronic documents without losing easiness of a www system. SOLUTION: A mark creating program 115e creates a mark containing additional information embedded in an image data from which a symbolism is visually recognizable, and a mark affixing program 115b affixes the mark to unique contents matching with the information embedded in the mark and registers it in a Web page DB 120. A mark detecting program 115f detects only the mark from the contents downloaded from the Web page, and a mark display program 115g compares the information in the mark with that of the contents, and displays the result of the genuineness in a mark varied in a visual design. A mark operating program 115h accepts user operation to the mark, and displays the result of the genuineness by letting a DB referring program 115i refer to the information of the mark. |
