Apparatus for data copyright management system

  • US 20020112173A1
  • Filed: 03/26/2002
  • Published: 08/15/2002
  • Est. Priority Date: 10/27/1994
  • Status: Active Grant
First Claim
Patent Images

1. A data copyright management apparatus, comprising:

  • decryption means which decrypts encrypted copyrighted digital data by using a first crypt key; and

    encryption means which encrypts said copyrighted digital data thus decrypted, by using a second crypt key.

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