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Content usage authority management system and management method

  • US 20040039911A1
  • Filed: 09/08/2003
  • Published: 02/26/2004
  • Est. Priority Date: 09/11/2001
  • Status: Active Grant
First Claim
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1. A content usage-right management system comprising:

  • a user device which utilizes content; and

    a service provider which distributes a content usage-right certificate in which content-usage condition information is stored to said user device, wherein;

    said user device is configured to utilize the content according to the content-usage condition information stored in the content usage-right certificate received from said service provider, and to make a request to change the content-usage condition information stored in the content usage-right certificate by sending the content usage-right certificate to said service provider; and

    said service provider is configured to generate, upon receiving the content usage-right certificate involving the request to change the content-usage condition information from said user device, an upgraded content usage-right certificate by changing the content-usage condition information recorded in the received content usage-right certificate, and sends the upgraded content usage-right certificate to said user device.

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