The strengthening of the destabilizing influence of modern challenges and dangers leads to the emergence of significant risks and threats to Ukraine’s national security. It creates the need to protect the country’s territorial integrity and sovereignty, for as much as the full-scale invasion of the Russian Federation into the territory of independent Ukraine caused an unprecedented crisis and critical conditions for the state’s functioning. The influence of these challenges and dangers on business structures, which are often subject to unauthorized interference in their activities by cybercriminals, is especially noticeable under such circumstances, which makes it necessary to ensure a high level of business cyber security. The purpose of the academic paper is to study the theoretical and applied principles of ensuring business cyber security in conditions of the domestic economy’s instability. The methodological base of the research comprises the following general scientific and special methods of economic analysis and scientific knowledge, namely: scientific abstraction, system analysis, synthesis, statistical analysis, comparison, analogies, classification, grouping, cluster analysis (based on the k-means method), graphic, tabular generalization and systematization. Based on the results of the conducted research, it can be stated that the cyber security of business in conditions of the domestic economy’s instability is characterized by an excessive influence of cyber risks and cyber threats. It has been established that the effectiveness of ensuring business cyber security depends on the level of the country’s development: highly developed countries have significantly higher cyber security indicators (USA: 0,919 - 1,000; Great Britain: 0,783 - 0,995; Germany: 0,679 – 0,974) than in developing countries (Moldova: 0,418 – 0,758; Belarus: 0,506 -0,592; Ukraine: 0,501 - 0,688). It has been proven that countries of the transitive type are unable to fully withstand the challenges and dangers of cyberspace, as a result of which business structures are exposed to malicious unauthorized encroachments by cybercriminals. The basic preventive and strategic measures to strengthen business cyber security are proposed, and the need for the codification of cyber law in Ukraine is substantiated.

Highlights

• It has been established that the effectiveness of ensuring business cyber security depends on the level of the country’s development.
• It has been proven that countries of the transitive type are unable to fully withstand the challenges and dangers of cyberspace, as a result of which business structures are exposed to malicious unauthorized encroachments by cybercriminals.
• An increase in the number of cyberattacks on business entities conducted using ransomware in the period 2017–2022 was revealed.