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Methodology of IT security risk assessment for critical industrial facilities in distributed cyberphysical systems

DOI 10.18127/j20700814-201905-07

Keywords:

I.I. Livshitz – Ph.D.(Eng.), Associate Professor, ITMO University (Saint Petersburg)
E-mail: Livshitz.il@yandex.ru
A.A. Zaytseva – Ph.D.(Eng.), Senior Research Scientist, St. Petersburg Institute for Informatics and Automation of RAS
E-mail: cher@iias.spb.su


At present, attention to the security of various critical infrastructure facilities, including information security, has increased significantly. It should be taken into account that the objects of critical infrastructure, as a rule, contain components of information technology – in the form of software, controllers, intelligent sensors, etc. All of these components may contain vulnerabilities, the evaluation of which by the end user may not always be performed within known constraints (time, cost, accuracy), and the risks of implementing negative scenarios in distributed cyberphysical systems may have catastrophic consequences. The article deals with the problem of formation of information technology security risk assessment as an important stage of the overall process of ensuring the security of critical industrial facilities. In the aspect of the considered problem, it is important to take into account the presence of a control system, which radically distinguishes a mechanical or electro-mechanical driver from a critical industrial facility. Accordingly, the problem of risk assessment for such a class of critical industrial systems should be addressed using appropriate methods to audit management systems at the appropriate levels. The article considers two main levels of audit for critical industrial facilities – the level of management system and the level of information technology components. Accordingly, this method is based on modern risk-oriented standards ISO/IEC series 27001 and 15408, as well as a number of other standards for the evaluation of information technology and audit of management systems.
The proposed method allows to obtain the calculated results of information technology security risks assessment in the constraints of location and composition of the components of critical industrial facilities in distributed cyberphysical systems. The main difference between the existing methods and the proposed method is that static threat models recommended by documents of regulators in the Russian Federation are currently used, as a rule. These documents do not take into account the risks of either information technology or information security, which does not allow to use for critical industrial facilities modern ISO/IEC standards or their national analogues GOST R. Accordingly, the risks of imported components of information technology and equally – the cumulative risks of integration of all components in the management system of critical industrial facilities can not be assessed. The proposed results can be applied in the formation of an independent assessment of information technology security of complex industrial facilities with the required accuracy.

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June 24, 2020
May 29, 2020

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