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Information processing device and method

  • US 20070162978A1
  • Filed: 01/27/2005
  • Published: 07/12/2007
  • Est. Priority Date: 01/29/2004
  • Status: Active Grant
First Claim
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1. An information processing device comprising:

  • a recording medium interface for executing reading of data from an information recording medium; and

    a data processing unit for executing recording processing of new data either generated or obtained applying information obtained from said information recording medium;

    wherein said information recording medium is an information recording medium storing recorded data in increments of content management units including encrypted data encrypted by unit keys each of which are set as different encryption keys;

    and wherein said data processing unit obtains a unit key corresponding to a content management unit to which said obtained information belongs or a unit key corresponding to a new content management unit, executes encryption processing of said new data applying the obtained unit key, and executes recording processing with the generated encrypted data as data configuring the content management unit.

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