METHOD FOR ENHANCING THE SECURITY LEVEL OF THE STATE’S CRITICAL INFORMATION SYSTEMS

In today's conditions of increasing cyber threats and the complexity of technological systems, ensuring the security of critical information systems (CIS) is one of the key tasks of national security of the state. Existing approaches to assessing the state of CIS security are mainly focused on individual technical or organizational aspects, which does not provide comprehensive consideration of the relationships between risk, reliability and stability. The article presents a method for increasing the level of CIS security, which involves formalizing the relationships between these parameters in the form of a system of mathematical expressions and introducing an integral indicator of the level of security. The proposed approach allows quantitatively assessing the current state of CIS security, predicting the impact of potential threats and determining optimal strategies for increasing stability, taking into account limited resources. The developed method ensures objective decision-making on risk management and increasing the effectiveness of CIS protection and contributes to the formation of an adaptive national cybersecurity system. Further research involves experimental testing and