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Software anti-piracy systems and methods utilizing certificates with digital content

  • US 7,043,050 B2
  • Filed: 05/02/2001
  • Issued: 05/09/2006
  • Est. Priority Date: 05/02/2001
  • Status: Active Grant
First Claim
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1. An electronic device for playing a digital content file, comprising:

  • a processor configured to process a digital content file;

    memory;

    a watermark detector configured to detect the presence of a watermark signal in the digital content file; and

    an authentication module configured to access a certificate, which indicates permissible uses of the digital content file, associated with and separate from the digital content file and determine from the certificate how the processor is authorized to process the digital content file in the event that the watermark detector detects the watermark signal.

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