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Designing Security-Hardened Microkernels For Field Devices

  • Jeffrey Hieb
  • James Graham
Conference paper
  • 916 Downloads
Part of the The International Federation for Information Processing book series (IFIPAICT, volume 290)

Distributed control systems (DCSs) play an essential role in the operation of critical infrastructures. Perimeter field devices are important DCS components that measure physical process parameters and perform control actions. Modern field devices are vulnerable to cyber attacks due to their increased adoption of commodity technologies and that fact that control networks are no longer isolated. This paper describes an approach for creating security-hardened field devices using operating system microkernels that isolate vital field device operations from untrusted network-accessible applications. The approach, which is influenced by the MILS and Nizza architectures, is implemented in a prototype field device. Whereas, previous microkernel-based implementations have been plagued by poor inter-process communication (IPC) performance, the prototype exhibits an average IPC overhead for protected device calls of 64.59 μs. The overall performance of field devices is influenced by several factors; nevertheless, the observed IPC overhead is low enough to encourage the continued development of the prototype.

Keywords

Distributed control systems field devices microkernels security 

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Copyright information

© IFIP International Federation for Information Processing 2008

Authors and Affiliations

  • Jeffrey Hieb
    • 1
  • James Graham
    • 1
  1. 1.University of LouisvilleLouisvilleUSA

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