Abstract
The purpose of the study: to improve security of significant objects of critical information infrastructure in conditions of destructive information impact, implemented in the form of advanced persistent threat (APT). Methods: comparative analysis of destructive information impact within the framework of a systematic approach; Markov theory of evolutionary processes; synergetics. Results: the authors carried out analysis of APT properties and their impact on objects of critical information infrastructure. To identify APTs, the use of a combination of various detection methods with the priority of heuristic analysis is substantiated. A scheme has been developed for the implementation of the method for assessing the state of an object of a critical information infrastructure based on a modified Markov-parametric model with a system for detecting computer attacks integrated into its structure. The preliminary assessment of computer attacks danger level as well as development of recommendations for their neutralization simultaneously with conducting the assessment of the properties and characteristics of destructive information impact are proposed.
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