Industrial Automatic Control Systems and Controllers Annotation << Back Assessing the Probability of Ensuring the Consistency of Normal Functioning Processes of a Cloud Information System Under Cyber-Attacks Goncharov N.I., Dushkin A.V., Shcherbakov V.A., Portnov E.M. This article examines an approach to modeling and assessing the probability of maintaining the normal functioning of cloud information systems when exposed to potential cyberattacks. The mathematical modeling is based on the concept of hybrid automata. Analytical relationships are introduced that allow us to determine the minimum probability of maintaining the normal functioning of a cloud information system, eliminating the need to consider the specifi c distributions of the time spent in various model states. The proposed approaches to modeling and assessing the probability of maintaining the normal functioning of a cloud service by a potential attacker are relevant for solving a wide range of problems. They can serve as a basis for developing more complex models necessary for analyzing real-world situations in which the distribution laws for the state time of a cloud information system and a potential attacker are unknown. Keywords: infrastructure, model, process immutability, cloud information system, regular functioning. DOI: 10.25791/asu.4.2026.1654 Pp. 43-52.