Safety and Security Co-engineering

Safety and Security Co-engineering is an integrated systems engineering methodology that harmonizes the traditionally separate disciplines of functional safety (per ISO 26262) and cybersecurity (per ISO/SAE 21434). Its core principle is to systematically analyze and manage the interplay between safety and security throughout the entire product development lifecycle. In modern connected vehicles, a cybersecurity vulnerability, such as a compromised braking system, can directly lead to a catastrophic safety failure. Co-engineering addresses this by employing unified risk assessment techniques, like combining Hazard Analysis and Risk Assessment (HARA) with Threat Analysis and Risk Assessment (TARA), to identify and mitigate such interdependent risks from the earliest design stages, ensuring the overall dependability and resilience of the final system.

Applying Safety and Security Co-engineering involves structured steps. First, establish an integrated governance framework by forming a cross-functional team of safety, security, and system engineers to define unified policies and processes. Second, conduct a joint risk analysis during the concept phase, performing HARA (ISO 26262) and TARA (ISO/SAE 21434) concurrently to identify dependencies and conflicts between safety and security goals. Third, synchronize verification and validation activities by designing test cases that cover both aspects, such as performing penetration testing on a safety-critical ECU to ensure it maintains a safe state under attack. Enterprises adopting this approach have reported up to a 40% reduction in critical post-release vulnerabilities and improved efficiency in achieving compliance with regulations like UNECE R155/R156.

Taiwanese enterprises face three key challenges. First, organizational silos often separate safety and security teams, hindering collaboration. The solution is to create a top-management-sponsored, cross-functional committee to enforce joint reviews. Second, there is a talent gap for engineers proficient in both ISO 26262 and ISO/SAE 21434. This can be mitigated through structured internal cross-training programs and partnering with expert consultants for initial guidance. Third, integrating disparate toolchains used by different teams is complex and costly. A phased approach, starting with a unified risk management platform and gradually integrating other tools using standardized models like SysML, can overcome this technical barrier.

Winners Consulting specializes in Safety and Security Co-engineering for Taiwan enterprises, delivering compliant management systems within 90 days. Free consultation: https://winners.com.tw/contact