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Apparatus for data copyright management system

  • US 6,408,390 B1
  • Filed: 08/16/1999
  • Issued: 06/18/2002
  • Est. Priority Date: 10/27/1994
  • Status: Expired due to Term
First Claim
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1. A data copyright management apparatus used with a user terminal for utilizing digital data:

  • said data copyright management apparatus comprising a central processing unit, a central processing unit bus, read-only semiconductor memory, electrically erasable programmable read-only memory, and read/write memory;

    wherein;

    said central processing unit, said read-only semiconductor memory, said electrically erasable programmable read-only memory, and read/write memory are connected to said central processing unit bus, and a system bus of said user terminal is able to be connected to said central processing unit bus;

    a data copyright management system program, and user information are stored in said read-only semiconductor memory;

    a first public-key, a first private-key, a second-public key, a second private-key, a first secret-key, a second secret-key, a copyright management program, and copyright information are stored in said electrically erasable programmable read-only memory.

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