Safety and Security of Cyber-Physical System: A Security Framework

Abstract

Although, we have seen rapid growth in the study, development and deployment of Cyber-Physical System in past decades. However, security threats are always there and numbers of security threats have also been improved, but numbers of new vulnerabilities, new kinds of attacks and different system’s compromising injections demand to explore more about CPSs in the light of security [2, 4]. In this research, we discuss about the safety and security of Cyber-Physical Systems and secure the communication of CPS using MQTT protocol. For consistency we will now use the term ‘CPS’ instead of Cyber-Physical System. We have used a water supply SCADA system to simulate the proposed framework about the safety and security of Cyber-Physical System. We have introduced liveness in our proposed framework to confirm that the triggered message has reached to its destination without any packet loss. As its development is not that easy, so for development, we have used NODE-RED a simulation tool to simulate our security framework and for language we have used NODE-JS. As the structure of CPS is very critical, so we have designed the flow of its communication we placed two CPS at two different places, which transfers the water from well to different tanks. The transfer of water flow is triggered through MQTT protocol and then check the accuracy of our proposed framework. This security framework of CPS is immune to all kinds of cyberattacks due to its liveness property. Different secure ports have a major role in this development. We have also used LOIC to check the immunity of our proposed framework.