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Method for human-assisted random key generation and application for digital watermark system

  • US 5,822,432 A
  • Filed: 01/17/1996
  • Issued: 10/13/1998
  • Est. Priority Date: 01/17/1996
  • Status: Expired due to Term
First Claim
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1. A method for using a computer system to generate a key for digital watermarking, the method comprising the steps of:

  • identifying a digital sample stream in which a digital watermark is to be encoded;

    selecting a random or pseudo-random sequence for use in encoding the digital watermark within the digital sample stream;

    receiving human interactive input information describing application of the random or pseudo-random sequence to the digital sample stream; and

    generating a key associating the random or pseudo-random sequence with the human interactive input information.

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