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Storage Medium Processing Method, Storage Medium Processing Device, and Program

  • US 20080260155A1
  • Filed: 06/08/2005
  • Published: 10/23/2008
  • Est. Priority Date: 06/16/2004
  • Status: Active Grant
First Claim
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1. A storage medium processing method a using a storage medium and a user terminal,wherein the storage medium stores medium identifier data, medium unique key data enabled to be generated based on the medium identifier data, encrypted user key data in which user key data is encrypted so that it may be decrypted using the medium unique key data and encrypted content key data in which content key data is encrypted so that it may be decrypted using the user key data,the user terminal to which the storage medium is able to be connected retains encrypted content data in which content data is encrypted so that it may be decrypted using the content key data, andthe user terminal connected to the storage medium is enabled to access to a license center to obtain various kinds of data,the method comprising:

  • a update requesting step in which the user terminal requests to the license center a update of the user key data in the storage medium submitting the medium identifier data;

    a update history reference step in which the license center refers to a update history of the user key data concerning to the medium identifier data submitted in the update requesting step;

    an update executing step in which the license center performs the update of the user key data based on the update request from the user terminal when it is judged that the update of the user key data concerning the submitted medium identifier data has not been performed within a predetermined period; and

    an update refusal step in which the license center refuses the update request from the user terminal when it is judged that the update of the user key data concerning the submitted medium identifier data has been performed within a predetermined period.

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