Serhii Demediuk

Work place: National Security and Defense Council of Ukraine, Kyiv, Ukraine

E-mail: cyberdemediuk@protonmail.com

Website:

Research Interests: Cyber Security, Information Security

Biography

Serhii Demediuk

Ph.D (Law), Deputy Secretary of the National Security and Defense Council of Ukraine. Deputy Head of the National Coordination Center for Cyber Security. Professor of the Cybersecurity Department of the National Academy of the Security Service of Ukraine. From 2015 to 2019 - Сhief of the Сyber Police of Ukraine.

Research interests: information security, сybersecurity, cyber warfare, cybercrime, cyber resilience, intelligence, counteraction to the hybrid threat.

Author Articles
Priorities for the Strategic Development of Ukraine's Cybersecurity Based on the Analysis of Expert Sampling Patterns

By Oleksandr Korystin Serhii Demediuk Yaroslav Likhovitskyy Yuriy Kardashevskyy Olena Mitina

DOI: https://doi.org/10.5815/ijitcs.2025.02.03, Pub. Date: 8 Apr. 2025

The study is devoted to assessing the risks of cyber threats in the future based on expert sampling patterns. One of the key problems of modern cybersecurity is the dynamic nature of threats that change under the influence of technological progress and socio-economic factors. In this context, the authors consider a methodological approach that involves the use of a multi-level analysis of expert opinions. The main emphasis is placed on taking into account the different points of view, experience and professional activities of experts from the public, private and academic sectors. An important stage of the study is the procedure of data cleaning to form a representative sample that takes into account only logically consistent responses of experts. The paper focuses on the integration of the expert sample patterns‘ features. The key differences in threat assessments between different groups of experts depending on their professional role and experience are identified. This made it possible to formulate comprehensive recommendations for strategic cyber risk management focused on both short-term and long-term priorities. The study makes a significant contribution to understanding the peculiarities of cyber risk assessment through the use of multivariate analysis of expert opinions. The proposed methodology allows not only to improve the quality of forecasts of future cyber threats, but also contributes to the creation of adaptive cybersecurity strategies that take into account the specifics of each sector. The findings of the study emphasize the importance of a multidimensional approach to analyzing cyber threats, taking into account the specifics of each expert group. Integration of assessments and consideration of local peculiarities are key to the development of adaptive and effective cyber defense strategies focused on global and local challenges.

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Comparative Risk Assessment of Cyber Threats Based on Average and Fuzzy Sets Theory

By Oleksandr Evgeniyovych Korystin Oleksandr Korchenko Svitlana Kazmirchuk Serhii Demediuk Oleksandr Oleksandrovych Korystin

DOI: https://doi.org/10.5815/ijcnis.2024.01.02, Pub. Date: 8 Feb. 2024

Applied results of scientific analysis should be the key focus of modern security research. A comparative analysis of research results obtained using different methods, as an applied task, forms a broader basis for interpreting the results and substantiating the conclusions. A social survey and expert opinion research were conducted to implement the general concept of strategic analysis of cybersecurity in Ukraine. Using the method based on determining the average value in a certain set of estimates, as well as the method based on the theory of fuzzy sets, the risks of spreading certain cyber threats in Ukraine were assessed. The results were compared. Although the use of different measurement methods led to some differences in quantitative risk indicators, the comparative analysis of the ratio of the level of different cyber threats did not change significantly. At the same time, the fuzzy set method provided more flexible interpretation of the results to characterize cyber threats in terms of their upward or downward trend. In general, the combined approach to cyber threat risk assessment can become an important risk management tool, as it takes advantage of different methods and allows for a deeper understanding of the current situation and the formation of more informed management decisions.

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