Watermarking using multiple watermarks and keys, including keys dependent on the host signal
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United States of America Patent
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Mar 6, 2012
Grant Date -
Sep 18, 2008
app pub date -
Oct 30, 2007
filing date -
Aug 30, 1996
priority date (Note) -
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Abstract
A method of embedding a watermarking in a host signal computes a first watermark depending on a particular party and computes a second watermark depending on the host signal. The method embeds the first and second watermarks in the host signal. At least one of the watermarks is embedded using a key derived from the host signal. In particular, one of the watermarks is embedded with a key derived from the host signal.
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