Identity Management for Enhanced Security in Industrial Automation and Control Systems

This paper explores the integration of blockchainbased Self-Sovereign Identity (SSI) technologies into Industrial Automation and Control Systems (IACS) to strengthen cybersecurity and operational resilience. After an overview of the threats facing industrial systems, we present a logical framework for a layered defense incorporating SSI. The logical framework for integrating SSI into existing industrial automation reference architectures provides a detailed examination of multi-layered endpoint protection strategies that leverage SSI to improve security. The framework takes into account the requirements for authentication, authorization and secure communication in different industrial contexts. Key use cases illustrate the practical applications of blockchain-based SSI, including secure maintenance workstations, inter-zone communication interlocks, convenience ports, security networks and remote user authentication. These use cases demonstrate how SSI increases both security and efficiency in IACS environments. The paper concludes with insights into the integration aspects and transformative potential of blockchain-based SSI for industrial security.