发明名称 Instance specific digital watermarks
摘要 A method and apparatus for dynamically applying digital watermarks. Requested content is sent to a security module of a user device. A digital watermark is dynamically determined based at least on instance information about a rendering engine of the user device. The digital watermark is then rendered with the content using the rendering engine of the user device.
申请公布号 US7269735(B2) 申请公布日期 2007.09.11
申请号 US20030425828 申请日期 2003.04.30
申请人 CONTENTGAURD HOLDINGS, INC. 发明人 RALEY MICHAEL;CHEN DANIEL;WU HSI-CHENG;TA THANH
分类号 H04L9/00;G06F21/00;H04L29/06;H04L29/08 主分类号 H04L9/00
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