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SYSTEM FOR SECURE TRANSFER OF INFORMATION FROM AN INDUSTRIAL CONTROL SYSTEM NETWORK

  • US 20140165182A1
  • Filed: 12/06/2012
  • Published: 06/12/2014
  • Est. Priority Date: 12/06/2012
  • Status: Active Grant
First Claim
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1. A system for securely transferring information from a first network positioned within a secure domain, comprising:

  • one or more remote terminal units within the secure domain;

    a first network within the secure domain coupling the one or more remote terminal units;

    one or more client computers within the secure domain;

    a second network within the secure domain coupling the one or more client computers;

    a send server within the secure domain and directly coupled to the first network and to the second network, the send server having an output and configured to act as a proxy for communications between at least one of the one or more client computers and at least one of the one or more remote terminal units, to store first information provided by the at least one of the one or more remote terminal units, and to transmit the stored first information on the output, the send server also configured to transmit a poll request to at least one of the one or more remote terminal units via the first network, to store second information supplied on the first network in response to the poll request, and to transmit the second information on the output; and

    a receive server outside the secure domain having an input coupled to the output of the send server via a data link which allows communication only from the send server to the receive server, the receive server configured to receive and store the first and second information provided via the input.

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