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Content licensing and conditional access using a mobile device

  • US 8,590,028 B2
  • Filed: 07/09/2008
  • Issued: 11/19/2013
  • Est. Priority Date: 07/09/2007
  • Status: Active Grant
First Claim
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1. A method for controlling access to protected content provided by a service provider, the method comprising:

  • during a registration process for a given user, storing an association between a symmetric encryption key and a unique identifier of a set-top box for the given user;

    encrypting the protected content using the symmetric encryption key associated with the unique identifier of the set-top box, wherein the set-top box is configured to validate access to view the protected content by accepting a content token;

    encrypting the symmetric encryption key to an encrypted symmetric encryption key, wherein the encrypted symmetric encryption key is decryptable with the content token serving as a dynamically-generated encryption key, wherein a mobile application configured to run on a mobile device that is physically separate from the set-top box is configured to generate the content token on the mobile device that is physically separate from the set-top box in response to a user request for access to view the protected content; and

    transmitting the encrypted protected content and the encrypted symmetric encryption key to the set-top box.

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