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Rendering rights delegation system and method

  • US 7,801,819 B2
  • Filed: 10/01/2004
  • Issued: 09/21/2010
  • Est. Priority Date: 10/03/2003
  • Status: Expired due to Fees
First Claim
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1. A method of distributing content wherein the content is comprised of a plurality of portions of the content, the method comprising:

  • storing the content and a first digital license on a first device of a user, wherein the content and the first digital license are provided by a content provider system, said first digital license being adapted to govern the use of the content by the first device and having a first expiration time period, wherein being adapted to govern the use of the content includes permitting the first device to determine whether the first device may provide a decryption key for use by a secondary device;

    storing a first digital certificate on the first device, said first digital certificate originating from the content provider system and including a first set of data corresponding to the identity of the content provider system;

    storing a second digital certificate on the secondary device, said second digital certificate originating from the content provider system and including a second set of data corresponding to the identity of the content provider system;

    transmitting a first digital request and the second digital certificate from the secondary device to the first device, said first digital request corresponding to a first request for use of the content;

    comparing the first set of data with the second set of data;

    transmitting a second digital license from the first device to the secondary device after receipt by the first device of the first digital request and if the first and second sets of data correspond to the same content provider system, said second digital license governing the use of the content by the secondary device and having a second expiration time period that is less than the first expiration time period;

    providing a first portion of the plurality of portions of the content from the first device to the secondary device, said first portion of the content being encrypted;

    decrypting the first portion of the content at the secondary device using the decryption key during at least a portion of the second expiration time period,transmitting a second digital request from the secondary device to the first device, said second digital request corresponding to a second request for use of the content, wherein the transmitting of the second digital request occurs after the step of transmitting the second digital license;

    transmitting a third digital license from the first device to the secondary device after receipt by the first device of the second digital request, said third digital license being adapted to govern the use of the content by the secondary device and having a third expiration time period that is less than the first expiration time period;

    providing a second portion of the plurality of portions of the content from the first device to the secondary device, said second portion of the content being encrypted; and

    decrypting the second portion of the content at the secondary device during at least a portion of the third expiration time period,wherein the first device and the secondary device are located on a premises and wherein the content provider system is located other than on the premises.

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