The paper includes a list of existing maturity models (cybersecurity maturity) and an analysis of the application of these models for assessing cybersecurity, the level, and maturity of cyber security, the maturity of systems and processes for ensuring cybersecurity in critical infrastructure sectors, in the national cybersecurity system, the development of indicators and indices of the state of security (network, information security, cybersecurity).The paper substantiates and proposes a hierarchy of models for assessing the maturity of cyber security in the national cyber security ecosystem (in the national cyber security system, critical infrastructure, particularly the fuel and energy sector). The investigation's main goal is to intensify the implementation of existing assessment models using multi-level cyber security assessment models (cybersecurity maturity), accumulating statistical data on cyber incidents, cyber-attacks, and countermeasures for further use in predictive analysis and modeling.The tasks of the research are the analysis, comparative analysis of existing models for evaluating the maturity of cyber security, formulation of evaluation models using indicators of
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