Availability Models of the Healthcare Internet of Things System Taking into Account Countermeasures Selection

An active infiltration of information technology in the healthcare sector has led to a fundamental change in people’s quality of life. Networked medical and healthcare devices and their applications are already creating an Internet of Medical Things which is aimed at better health monitoring and preventive care. But the new concepts and applying of new technologies bring certain risks including failures of devices, infrastructure which may lead to the worst outcome. In this regard, the security and safety problems of this technology using increase rapidly. This paper touches upon the issue of the healthcare Internet of Things (IoT) infrastructure failures and attacks on components and complete system. The purpose of the paper is to develop and research the availability models of a healthcare IoT system regarding failures and attacks on components. A detailed analysis of an architecture of healthcare IoT infrastructure is given. The main causes of the healthcare IoT based system failures are considered. This paper presents an approach to develop a Markov models set for a healthcare IoT infrastructure that allows considering safety and security issues. Much attention is given to developing and research of the Markov model of a healthcare IoT system considering failures of components. The analysis of obtained simulation results showed the rates that have the greatest influence on the availability function of the healthcare IoT system. In addition, it is presented a case study with a game theoretical approach to select countermeasure tools.