Abstract
The article considers the possibilities of improving the cyber defense system of the Armed Forces of Ukraine and the Ministry of Defense of Ukraine in accordance with the goals and objectives defined in the decisions of the National Security and Defense Council of Ukraine and the Laws of Ukraine. A review of the requirements of normative documents on information and cyber security of Ukraine and similar documents of the United States of America was carried out. The considered algorithm for developing a risk management system in the direction of information security is outlined in the USA national standards. The scientific novelty of the work is that in the process of developing the risk management system in the information and communication systems (ICS) of the Armed Forces of Ukraine and the Ministry of Defense of Ukraine, it was proposed to create an decision support system that will be based on a specialized knowledge base capable of accumulating experience both during cyber-defense measures of the ICS and during the implementation of cyber-influences on the ICS of the enemy. An overview of open international standardization methods and relevant knowledge bases that can be used to update information on vulnerabilities and countermeasures in IC systems was carried out. The joint to use of open knowledge bases and specialized knowledge bases potentially can create new opportunities not only during cyber defense, but also during the implementation of cyber influences on the ICS of the enemy, therefore, this direction of research is promising and corresponds to the national interests of Ukraine

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