A Pragmatic Approach on Combined Safety and Security Risk Analysis

In this paper we discuss the issue of balancing safety and security requirements in industrial automation and control systems. This is an area that requires careful attention. We propose a methodology/framework for addressing both safety and security for safety critical systems in industrial automation and control systems. Our concern is analyzing those vulnerabilities that when a threat agent is enacted on them, result in hazards such as damage to equipment or property or hazards resulting in personal injury or death.