Formal Methods Based Security for Cloud-based Manufacturing Cyber Physical System

With the advent of the Internet of Things (IoT), Cloud-based Cyber-Physical Systems (C2PS) are becoming more prevalent in manufacturing systems. Verifying the security of C2PS is a challenging task due to the inclusion of newer entities such as mobile phones and IoT devices. Therefore, scalable methods for verifying security properties of manufacturing systems are paramount. This paper presents an approach to guarantee security of C2PS using concepts from Communicating Sequential Processes (CSP) to describe the security properties of cloud constructs. We prove that composability is an essential property for enhancing the security of the C2PS. Furthermore, it also provides good scalability to the system. We propose formalisms required for modelling security properties in the Industrial IoT-based manufacturing system. Using this formalism and Hoares' logic we provide conditions for composing systems. Finally, we provide strong authentication conditions among entity pairs in C2PS based manufacturing systems. We demonstrate the message exchanges, methodology, and different steps required for verifying C2PS. (C) 2019, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.