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Method of and system for encrypting digital data, method of and apparatus for reproducing digital data, and computer product

  • US 7,330,980 B2
  • Filed: 04/30/2002
  • Issued: 02/12/2008
  • Est. Priority Date: 05/11/2001
  • Status: Expired due to Fees
First Claim
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1. A digital data encryption system comprising:

  • an operation unit which receives digital data and encrypts the digital data in accordance with a predetermined encryption algorithm and an encryption operation equation determined based on an encryption operation equation generation parameter; and

    a file unit which generates a file by combining the digital data encrypted by the operation unit with an index value capable univocally of determining the encryption algorithm and the encryption operation equation generation parameter used for encryption of the digital data,wherein the operation unit is configured to embed a data manipulation detection code in at least one of various locations in the digital data based on the predetermined encryption algorithm prior to the encryption of the digital data, in order to enable the detection of an illegal manipulation of the digital data.

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