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Methods and systems using multiple watermarks

  • US 6,728,390 B2
  • Filed: 12/07/2001
  • Issued: 04/27/2004
  • Est. Priority Date: 05/08/1995
  • Status: Expired due to Fees
First Claim
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1. A method of steganographically encoding an object with auxiliary information, characterized by adding first and second data to the object to thereby steganographically encode same, the first data having a relatively higher likelihood of withstanding a corruption operation, the second data having a relatively lower likelihood of withstanding said corruption option, wherein said corruption operation comprises compression and subsequent decompression by a lossy process.

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