Safety and Security Design Processes

This chapter describes and compares design processes and methodologies targeted to safety and security. The broad outlines of safety- and security-oriented design bear some similarity, but they differ significantly in emphasis: safety concentrates on requirements, while security emphasizes architecture and coding. Safety-oriented design uses fault models to analyze hazards, while security-oriented design uses attack models. Certification is particularly important in the design of certain safety-critical systems. Quality management is applied to a wider range of systems.