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System and method for securing a computer communication network

  • US 6,865,672 B1
  • Filed: 04/28/1999
  • Issued: 03/08/2005
  • Est. Priority Date: 05/18/1998
  • Status: Expired due to Fees
First Claim
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1. A system for securing a trusted computer communication network comprising:

  • a master decision maker unit coupled to the trusted network; and

    at least one slave communication unit coupled to the master unit by a wide bus connection that has multiple unidirectional communication channels, said slave communication unit being further connected to a non-trusted network;

    characterized in that;

    (i) a chip based circuit is provided between said trusted network and said non-trusted network thereby keeping said networks is physically and logically disconnected from each other at all times, by preventing data streaming therebetween;

    (ii) all data transported between the trusted network and said non-trusted network is transported between said master unit and said slave unit in static form;

    (iii) all data transported between the trusted network and said non-trusted network is transported through unidirectional communication channels, using a handshake mechanism solely controlled by said trusted side, thereby preventing data streaming therebetween.

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