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Communication of electronic data via a network infrastructure

  • US 20040122975A1
  • Filed: 01/21/2004
  • Published: 06/24/2004
  • Est. Priority Date: 02/23/2001
  • Status: Abandoned Application
First Claim
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1. An apparatus for communicating electronic data via a network infrastructure (101;

  • 401;

    701) having a unicast mechanism and a multicast mechanism, said apparatus comprising a server (100;

    400;

    700), which contains electronic data and is capable of using said unicast and multicast mechanisms for communicating said electronic data to one or more clients (102;

    402;

    702), characterized in that it comprises means (103) adapted to make a decision, taking into account a predetermined set of parameters, whether said server (100;

    400;

    700) shall use said unicast mechanism or said multicast mechanism for communicating said electronic data to said clients (102;

    402;

    702) and that said server (100;

    400;

    700) is arranged to communicate said electronic data to said clients (102;

    402;

    702) in accordance with said decision, and that for providing secure data communication when said decision is for said multicast mechanism to be used for communicating said electronic data to said clients (102;

    402;

    702), each of said clients (102;

    402;

    702) is adapted to communicate a first data encryption key to a device (403), that said device (403) is adapted to calculate a second data encryption key for each of said clients (102;

    402;

    702) through a predetermined operation using a unique client identifier and said first data encryption key, that said device (403) is adapted to communicate said second data encryption keys to each respective client (102;

    402;

    702), that said server (100;

    400;

    700) is adapted to encrypt the electronic data to be communicated using a third data encryption key corresponding to the difference between said first and second data encryption keys according to said predetermined operation, that said server (100;

    400;

    700) is adapted to communicate the encrypted electronic data to each respective client (102;

    402;

    702), that each of said clients (102;

    402;

    702) is adapted to create said third data encryption key using said first and second data encryption keys, and that each of said clients (102;

    402;

    702) is adapted to decrypt the communicated electronic data using said third data encryption key.

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