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METHOD FOR MANAGING COPY PROTECTION INFORMATION OF RECORDING MEDIUM

  • US 20080059377A1
  • Filed: 10/31/2007
  • Published: 03/06/2008
  • Est. Priority Date: 04/24/2003
  • Status: Abandoned Application
First Claim
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1. A method for managing copy protection information, the method comprising:

  • reading copy protection information used for decrypting encrypted data, the copy protection information to be decrypted using a combination key which is a combination of a first and a second key;

    decrypting the copy protection information using the combination key;

    and decrypting the encrypted data using the copy protection information, wherein the first key is a private code and the second key is managed in a device and based on a key renewal information renewedly generated by a server according to changes in validity of the device.

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