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System and method of secure information transfer

  • US 7,387,240 B2
  • Filed: 03/08/2005
  • Issued: 06/17/2008
  • Est. Priority Date: 12/11/2003
  • Status: Active Grant
First Claim
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1. A method for securely transferring data between a first device and a second device over an open network, comprising the steps of:

  • establishing a secure connection to the first device over the open network through an open network server;

    generating a public/private encryption key pair at the first device;

    transmitting a public encryption key of the public/private encryption key pair to the second device on the secure connection over the open network;

    generating a first encryption key for encrypting communications between the first device and the second device and a second encryption key for encrypting the data transmitted between the first device and the second device;

    providing a first cryptogram including the first encryption key to the second device and the first device;

    providing a second cryptogram including the second encryption key to the second device and the first device;

    providing a third cryptogram including both the first encryption key and the second encryption key to the second device and the first device;

    decrypting the first, second and third cryptograms at the first device to determine the first encryption key and the second encryption key; and

    providing secure information transfer between the first device and the second device using the public/private encryption key pair, the first encryption key and the second encryption key.

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