Estimation of critical information infrastructure sustainability functioning

The article discusses the approach to the assessment of critical information infrastructure (CII), operating in cyberspace in conditions of information warfare. The result of assessment is the value of the integral criterion of ability to achieve goal function CII at each moment of time. The novelty of work is determined by the consideration of promising evaluation method of complex technical systems with a high degree of criticality and uncertainty representation. The practical significance consists in the fact that the new evaluation method can be used to improve the efficiency of management CII, and to justify new forms and methods of warfare in cyberspace. The article deals with the issues of cybernetic sustainability, its core components, and properties of management determining the cyber stability. Classification of CII objects is done. The formal definition of the cyber stability measure, the technique and the algorithm of its calculation are given.