ABSTRACT
This chapter discusses the digital twin (DT) security of the cyber-physical water supply system. Based on the international strategies of control DTs analysis, all countries have a lot of water problems like high wear of water supply systems, security problems, anthropogenic impact on water resources and dependence on other countries. The range of CPS vulnerabilities is wider than the OSI model. To assess the vulnerabilities of the CPS, it is necessary to supplement the system elements related to the features of the CPS and important to add extra security layers: exploitation layer, intersystem layer, external layer and control layer. The calculation of risks/vulnerabilities using author’s methods, compared for analogue water supply system (AWSS) and digital water supply system (DWSS), presents the results of degree risk of each group of vulnerabilities, like №1 – Infrastructure level (water supply systems, equipment, water sources) or №2 – Software level has different levels for AWSS and DWSS. Security of DT is a complex task. By using authors’ methods of security assessment cyber-physical water supply system (CPWSS) was created as a security model of the DT CPWSS which was practically tested in the water supply company “Vodokanal of St. Petersburg” (St. Petersburg, Russia) – the second largest water supply company after Moscow. This approach allowed improving security systems of the water supply company.
