Invention Application
WO2004038531A9 WATERMARK INSERTION APPARATUS AND WATERMARK EXTRACTION APPARATUS
审中-公开
WATERMARK插入装置和WATERMARK提取装置
- Patent Title: WATERMARK INSERTION APPARATUS AND WATERMARK EXTRACTION APPARATUS
- Patent Title (中): WATERMARK插入装置和WATERMARK提取装置
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Application No.: PCT/JP0313405Application Date: 2003-10-21
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Publication No.: WO2004038531A9Publication Date: 2004-07-15
- Inventor: SATO YUJI , YAMAGUCHI TAKAO , SATO JUNICHI , TAKEI ICHIRO , ITO TOMOAKI
- Applicant: MATSUSHITA ELECTRIC IND CO LTD , SATO YUJI , YAMAGUCHI TAKAO , SATO JUNICHI , TAKEI ICHIRO , ITO TOMOAKI
- Assignee: MATSUSHITA ELECTRIC IND CO LTD,SATO YUJI,YAMAGUCHI TAKAO,SATO JUNICHI,TAKEI ICHIRO,ITO TOMOAKI
- Current Assignee: MATSUSHITA ELECTRIC IND CO LTD,SATO YUJI,YAMAGUCHI TAKAO,SATO JUNICHI,TAKEI ICHIRO,ITO TOMOAKI
- Priority: JP2002311815 2002-10-25; JP2003133566 2003-05-12; JP2003324805 2003-09-17
- Main IPC: G06F21/22
- IPC: G06F21/22 ; G06F21/00 ; G09C1/00 ; G09C5/00 ; G06F
Abstract:
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.
Public/Granted literature
- WO2004038531B1 WATERMARK INSERTION APPARATUS AND WATERMARK EXTRACTION APPARATUS Public/Granted day:2005-02-03
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