Method for digital data processing, copy prevention method of recording system and copy prevention device

Method for digital data processing, copy prevention method of recording system and copy prevention device

  • CN 1,822,168 A
  • Filed: 11/26/1995
  • Published: 08/23/2006
  • Est. Priority Date: 11/26/1994
  • Status: Abandoned Application
First Claim
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1. copy prevention method comprises step:

  • (a) detection key information is recorded in the user data of the encryption on the digital recording medium with deciphering;

    (b) decipher the user data of described encryption based on detected key information;

    And(c) user data deciphered of output is to recover raw data.

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