A safety case is a structured argument, backed by documented evidence, that a system is safe enough to deploy in its intended environment. It usually combines hazard analysis, test results, operational limits, failure handling, and independent review into one traceable justification. The goal is not to prove a system is risk-free, but to show that known risks are understood and controlled.
In cyber security, safety cases matter for systems where software failure can cause physical, financial, or public harm: autonomous vehicles, medical devices, industrial control systems, and cloud services with critical workloads. Defenders use them to demonstrate that security controls, monitoring, and incident response are sufficient for real-world use. During attacks, gaps in the safety case can become a weak point: missing evidence, untested assumptions, or poor change control can delay approval, trigger audits, or expose unsafe behavior before deployment.