Copy protection of data

  • US 7,079,649 B1
  • Filed: 03/18/1998
  • Issued: 07/18/2006
  • Est. Priority Date: 03/27/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of protecting data sent from a server to a client, said method comprising:

  • running a program portion at the client, the program portion generating and uploading to the server a request for access to data;

    cryptographically protecting the data;

    sending the cryptographically protected data to the client; and

    after the running of the program portion has begun and under control of the program portion at the client, converting the cryptographically protected data to an unprotected form and selectively controlling access to copy or save functions at the client in respect of the data in its unprotected form.

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