US Patent 8140848 Digital watermark key generation
Patent 8140848 was granted and assigned to Digimarc on March, 2012 by the United States Patent and Trademark Office.
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Patent 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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Patent Inventor Names
Hugh L. Brunk0
Trent J. Brundage0
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US Patent 08140848 Digital watermark key generation US Patent 8140848 Digital watermark key generation
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Patent Number
08140848
Patent Number
8140848
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US Patent 08140848 Digital watermark key generation
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Is a
Current assignee
Patent jurisdiction
Patent number
08140848
Date of patent
March 20, 2012
Patent application number
11140540
Date Filed
May 26, 2005
Patent primary examiner
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