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System and method for ensuring secure communication between TV and set back box

  • US 7,856,104 B2
  • Filed: 02/05/2007
  • Issued: 12/21/2010
  • Est. Priority Date: 02/05/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • establishing a high definition multimedia interface (HDMI) video communication channel between a TV and a source of multimedia;

    establishing a serial bus secondary communication channel between the TV and the source;

    sending a High Bandwidth Digital Content Protection (HDCP) encryption data element from the TV to the source over the HDMI video communication channel; and

    preventing communication between the TV and source if the HDCP encryption data element is not returned to the TV from the source over the serial bus secondary communication channel.

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