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Method for controlling database copyrights

  • US 20020021807A1
  • Filed: 11/02/2001
  • Published: 02/21/2002
  • Est. Priority Date: 04/01/1994
  • Status: Active Grant
First Claim
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1. A method for controlling copyright of digital data encrypted and supplied from a database to a user, wherein:

  • a utilization permit key including a decryption key for said digital data is supplied from a key control center to said user;

    said utilization permit key comprising at least one of the following;

    a display permit key for displaying said digital data, an edit permit key for editing said digital data, a storage permit key for storing said digital data, a copy permit key for copying said digital data, a transfer utilization permit key for transferring said digital data; and

    said user decrypts said digital data using said permit key and performs at least one of the following operations as provided by said utilization permit key;

    displays said digital data, edits said digital data, stores said digital data, copies said digital data, transfers said digital data.

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