Digital watermark key generation
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United States of America Patent
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Mar 20, 2012
Grant Date -
Jan 19, 2006
app pub date -
May 26, 2005
filing date -
Jul 1, 2004
priority date (Note) -
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Abstract
The present invention relates to message encoding. In a first implementation, a message is provided. The message is transformed by a secret key. The secret key is generated by providing a plural-bit seed. The seed is randomized and then error correction encoded. We prefer tail-biting convolutional encoding for our error correction encoding. The encoded seed forms a secure key, which is used to transform the message prior to embedding.
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