Ensuring the security of state information systems in conditions of uncertainty

The paper addresses issues related to information security of information systems (IS). The Relevance of the work is primarily due to the fact that the number of cyber-attacks on various sectors of the Russian economy is not decreasing, but keeps growing every year. There is an increasing interest in the information circulating in government authorities (at all levels) and SIS. Sometimes important strategic (state) tasks often have to be relegated to the "background" before the need to solve urgent (important short-term) tactical tasks. Today, SIS is an integral part of a rather complex management system, and (itself) management (in fact) becomes situational, which means that the role of public administration structures, and SIS, in these conditions has not lost its relevance. The subject of the research is to ensure the security of SIS in conditions of uncertainty. To achieve this goal, the paper uses the method of analysis of regulatory legal acts of the Russian Federation. SIS data are considered as objects of computer attacks under conditions of uncertainty. The structure of the SIS categorization methodology was developed. The paper discusses the main definitions, arguments, and sources that confirm the importance of assessing threats to the security of SIS information. As a result of the research the increasing importance of protection and the relevance of developing a methodology for assessing information security threats are confirmed. Conclusion: correctly set work (with initial data) for conducting research in conditions of a high degree of their uncertainty is a key point in solving any problems related to information security, including SIS. The results of the study can be used to develop a methodology for assessing threats to the security of state information systems.