Strielkina A. Information technology models and methods of dependability ensuring of healthcare Internet of things systems

The dissertation is devoted to the enhancing the dependability of healthcare IoT systems based on the development and practical application of information technology models and methods for healthcare systems. The scientific results are: 1) the complex of models of evaluation of the healthcare IoT systems dependability by taking into account different functional states, types of failures and cyberattacks has been improved, which allows to calculate indicators of availability, functional safety and cybersecurity, to determine their dependence on the parameters of medical mobile devices and cloud environment; 2) for the first time, a model of functional behavior of a healthcare device has been obtained, which, unlike the known ones, takes into account different laws of time distribution between service requests, as well as different types of failures by the level of criticality, which allows to determine the influence of indicators of the healthcare device on availability and dependability of healthcare IoT system in general; 3) the method of providing cybersecurity for healthcare IoT systems has been further developed by the choice of countermeasures using matrix game theory, which allows to choose the number of protection tools by the maximin criterion. 4) the method of case-based assessment of the healthcare IoT system cybersecurity has been improved through the formation of a profile-based base of standards and functional requirements, as well as procedures for selecting assessment tools to improve the completeness of the assessment.