WEB PAGE AUTHENTICITY CONFIRMATION APPARATUS, WEB PAGE AUTHENTICITY CONFIRMATION METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To suppress a time required for digital watermark detection processing for a Web page having a large quantity of data of image data.

SOLUTION: A management server 1 transmits a program for causing the computer of a terminal 6 to execute processing of calculating the hash value of an image included in a Web page and determining whether or not any matched value is present in a hash value list and processing of transmitting the digital watermark identification information of the image of the hash value and the identification information of the Web page to an authenticity determination server 2 and receiving the authenticity determination result of the reply from the terminal 6 when the matched value is determined to be present. The authenticity determination server 2 determines whether or not the correspondence relationship between the digital watermark identification information received from the terminal 6 and the identification information of the Web page is recorded in the authenticity determination table showing the correspondence relationship between the digital watermark identification information and the identification information of the Web page, and transmits an authenticity determination result indicating truth when determining that the correspondence relationship is recorded, and indicating false when determining that it is not recorded.

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