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Onboard access control system for communication from the open domain to the avionics domain

  • US 8,856,508 B2
  • Filed: 06/03/2008
  • Issued: 10/07/2014
  • Est. Priority Date: 06/06/2007
  • Status: Active Grant
First Claim
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1. An onboard access control system to an information system onboard an aircraft, including an avionics domain satisfying clearly defined certification rules, and an open domain based on general public components accessible to all operators, the open domain operating according to a first communication protocol and the avionics domain operating according to a second communication protocol that is different from the first communication protocol, the system comprising:

  • a single-directional link that allows communication from the avionics domain to the open domain; and

    a secure link for communication from the open domain to the avionics domain, the secure link includingan operator authentication section obtaining an operator'"'"'s profile, anda security device comprisingfirst and second hardware access switches operating as an electronic lock preventing a permanent communication link from the open domain to the avionics domain, the first hardware access switch connected between the open domain and a first access module and the second hardware access switch connected between a second access module and the avionics domain,a controller that receives the operator'"'"'s profile and controls opening of the first and second hardware access switches for durations that depend on the operator'"'"'s profile,the first access module including a first buffer memory, the first access control module being configured to receive data from the open domain through the first hardware access switch according to the first communication protocol and store the data originating from the open domain in the first buffer memory,the second access module including a second buffer memory, the second access module being configured to put the data from the first buffer memory into the second buffer memory for subsequent transmission through the second hardware access switch to the avionics domain according to the second communication protocol,a data control module situated between the first and second access modules and configured to define filter criteria applicable to all exchanges between the first and second buffer memories, andthe controller is further configured to erase the first buffer memory before closing the second hardware access switch to allow the data from the second buffer memory to be transmitted through the second hardware access switch to the avionics domain according to the second communication protocol.

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