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Copy protection of data

  • US 7,366,701 B2
  • Filed: 05/12/2003
  • Issued: 04/29/2008
  • Est. Priority Date: 03/27/1997
  • Status: Expired due to Fees
First Claim
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1. A method of downloading encrypted data from a server to a client, said method including:

  • registering the client with the server by;

    determining a machine identifier of the client by analysing its hardware and/or its software configuration,transmitting the machine identifier to the server,embedding the transmitted machine identifier with a cryptographic key in an applet, andtransmitting the applet to the client, subsequently identifying the client to the server by;

    at the client, again determining the machine identifier for the clientat the client, comparing the again determined machine identifier for the client with the machine identifier embedded in said applet, andsignaling to the server on the basis of the outcome of the comparison; and

    thendownloading data encrypted by means of the cryptographic key to the identified client, anddecrypting the downloaded data at the client using the cryptographic key from the applet.

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