In article is presented hierarchical rank an approach to assessing damage to objects of critical information infrastructure under the impact of destructive electromagnetic radiations, providing formalisationt the specified objects and the account of their criticality with use of the conceptual scheme within the limits of expert system, and also distribution of influences of the opponent, with their subsequent classification as destructive electromagnetic attacks. One of the main tasks for the

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... jects of CII facilities that provide vital public functions is the analysis and assessment of threats and consequences from exposure of electromagnetic impulses (EMI) of artificial origin, which can be used to disorganize CII control systems. , suppression of technical means of protection (TMP) of specially protected objects, as well as causing significant economic damage.