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Transmission of digital content to select devices

  • US 9,794,606 B2
  • Filed: 04/29/2014
  • Issued: 10/17/2017
  • Est. Priority Date: 04/29/2013
  • Status: Active Grant
First Claim
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1. A method for transmitting digital content in an electronic device, the method comprising:

  • detecting devices authorized to receive digital content by executing security key exchange authentication, followed by executing Round Trip Time (RTT) signal authentication, the authorized devices being disposed within a predetermined radius of a sender device as detected by the RTT signal authentication; and

    executing authentication on the authorized devices by;

    displaying a list of the authorized devices, receiving an input to the displayed list selecting at least one of the authorized devices from the displayed list,in response to the received input selecting the at least one of the authorized devices from the list as a recipient device for displaying the digital content, generating a session key for the selected at least one of the authorized devices, and identifying whether the generated session key corresponds to a local session key generated by and received from the selected at least one of the authorized devices, andtransmitting digital content encrypted by a HDCP encryption engine to any device in which the generated session key corresponds to the local session key and preventing transmission of digital content to any device lacking a corresponding session key,wherein the electronic device is a source device, and displaying the list of authorized devices and receiving the input to the displayed list further comprises;

    displaying the digital content on a local display of the source device while transmitting the digital content encrypted by the HDCP encryption engine to the selected at least one of the authorized devices for display,in response to the received input, displaying a pop-up window on the local display overlaying the displayed digital content requesting a confirmation to transmit the digital content to the selected at least one of the authorized devices, andgenerating the session key in response to receiving the requested confirmation.

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