WATERMARK INSERTION APPARATUS AND WATERMARK EXTRACTION APPARATUS
摘要
The present invention generates watermark from ID information that uniquely identifies a program distribution destination, inserts the generated watermark in a program, and prevents the program from operating correctly if the watermark is tampered with, and also inserts the same watermark verification code in a program regardless of the distribution destination. By this means, it is possible to prevent detection of watermark verification code constituting a watermark by means of collusion attack.
申请公布号
WO2004038531(A9)
申请公布日期
2004.07.15
申请号
WO2003JP13405
申请日期
2003.10.21
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;SATO, YUJI;YAMAGUCHI, TAKAO;SATO, JUNICHI;TAKEI, ICHIRO;ITO, TOMOAKI