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Systems and methods for digital content security

  • US 20060045309A1
  • Filed: 06/14/2005
  • Published: 03/02/2006
  • Est. Priority Date: 06/14/2004
  • Status: Abandoned Application
First Claim
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1. A method for digital watermarking comprising:

  • generating an input key, generation of the input key comprising a sequence of operations, the operations comprising;

    performing at least one circular-bit-shift operation on a gradient image, and performing at least one block-wise permutation on the gradient image; and

    performing a fragile watermark-embedding algorithm using the input key.

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