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Cross domain gateway having temporal separation

  • US 9,560,012 B1
  • Filed: 06/27/2013
  • Issued: 01/31/2017
  • Est. Priority Date: 06/27/2013
  • Status: Active Grant
First Claim
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1. A computer network comprising:

  • a first domain, the first domain having a first security classification such that the first domain accepts data in response to the data complying with the first security classification;

    a second domain, the second domain having a second security classification such that the second domain accepts data in response to the data complying with the second security classification, wherein the security classification of the second domain has a higher level of security classification than the security classification of the first domain; and

    a Temporal Separation Cross Domain Gateway (TSEP-CDG) having a temporal separation hardware interlock configured to physically prevent communication between the first and the second domains, wherein the TSEP-CDG is configured to;

    connect, via the temporal separation hardware interlock, with the first domain;

    receive data from the first domain, the data complying with the first security classification of the first domain, but not the second security classification of the second domain;

    disconnect the temporal separation hardware interlock from the first domain;

    execute an information-invariant data transformation on the received data to transform the data to comply with the security classification of the second domain;

    connect, via the temporal separation hardware interlock, with the second domain;

    transmit the transformed data to the second domain, the transformed data complying with the security classification of the second domain; and

    disconnect the temporal separation hardware interlock from the second domain.

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