Methodology for a combined Safety and Security Analysis based on classic HAZOPs for Operational Technology Insert

Abstract

The continuous increase in digitalization and automation in the chemical industry leads to more interconnected systems via internal and external networks. These systems are vulnerable to cyber-physical attacks and can affect safety. To protect chemical plants against safety-related failures and security-related attacks, a comprehensive and combined safety and security analysis is required. This article presents a uniform methodology, which includes safety hazards and security vulnerabilities as well as an analysis of potential hazards due to interaction between both. A strong focus is placed on the easy applicability of the method by integrating well-known safety procedures like HAZOP into the methodology. The article summarizes research results submitted for publication in (Biernath, 2022).