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Digital data recording apparatus, digital data recording method, and computer-readable recording medium

  • US 6,834,348 B1
  • Filed: 07/22/1999
  • Issued: 12/21/2004
  • Est. Priority Date: 07/22/1998
  • Status: Expired due to Term
First Claim
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1. A digital data recording apparatus for recording digital data on a recording medium, said apparatus comprising:

  • a communication unit operable to receive encrypted digital data via a digital network;

    a decryption unit operable to decrypt the encrypted digital data received by said communication unit;

    an encryption unit including a plurality of encryption sub-units operable to re-encrypt decrypted digital data in encryption systems having different security levels;

    a recording unit operable to record digital data that has been re-encrypted by said encryption unit on the recording medium;

    an accounting unit operable to conduct an accounting process via the digital network; and

    a controller operable to control said decryption unit, said encryption unit and said accounting unit;

    wherein said controller is operable to select and control one of said encryption sub-units from among said plurality of encryption sub-units to re-encrypt the digital data that has been decrypted by said decryption unit, to determine an accounting value according to said one of said encryption sub-units that has re-encrypted the decrypted digital data, and to control said accounting unit so that said accounting unit conducts the accounting process according to the determined accounting value.

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