发明名称 |
COLLUSION RESISTANT WATERMARKING GENERATION METHOD |
摘要 |
A method and system of detecting colluders conducting a collusion attack including a minority-type collusion attack on a digital product includes the generation of codewords used as watermarks in the digital product. The inner code of the codewords is generated using permutations of rows in a Hadamard matrix and concatenating them together. A typical outer code of the codeword is the Reed Solomon code. An adaptive detector is able to accurately detect one of three or more colluders of a minority-type attack. Prior art schemes using an error correcting code-based watermarking mechanism with an inner code fail to detect colluders with a minority-type collusion attack which includes three colluders. |
申请公布号 |
CA2737610(C) |
申请公布日期 |
2016.10.11 |
申请号 |
CA20082737610 |
申请日期 |
2008.09.26 |
申请人 |
THOMSON LICENSING |
发明人 |
LIN, WAN-YI;BLOOM, JEFFREY ADAM;HE, SHAN |
分类号 |
G06T1/00 |
主分类号 |
G06T1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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