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Content delivery system and content delivery method

  • US 20020099663A1
  • Filed: 10/31/2001
  • Published: 07/25/2002
  • Est. Priority Date: 11/01/2000
  • Status: Active Grant
First Claim
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1. A content delivery system comprising:

  • a user device which transmits a content-purchasing request to a shop server;

    a shop server which receives the content-purchasing request from the user device and which manages an encrypted content encrypted using a content key Kc and also manages an encrypted content key which cannot be decrypted by a key stored in the user device; and

    a user device authentication server for performing a key conversion process so as to convert the encrypted content key into a form which can be decrypted using the key stored in the user device;

    wherein if a process for charging the fee for the content purchased by the user device has been completed, the encrypted content key converted by the user device authentication server into the form which can be decrypted by the key stored in the user device is provided by the shop server to the user device.

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