Digital watermarking to resolve multiple claims of ownership
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United States of America Patent
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Aug 7, 2001
Grant Date -
N/A
app pub date -
Aug 27, 1997
filing date -
Aug 30, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for digital watermarking to resolve multiple claims of ownership is disclosed. According to one embodiment of the invention, a first watermark requiring the host data for detection is embedded into the host data. A second watermark is also embedded into the host data. According to another embodiment of the invention, a pseudo-random sequence acting as a watermark is generated based on two random keys. One of the two random keys is related to the author of the host data into which the watermark is to be embedded, whereas the other of the two random keys is dependent on the host data itself.
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