What it means
That confidence may rely on rigorous requirements, formal methods, controlled development, strong isolation, verified components, independent assessment, and disciplined operations.
Why it matters
Systems with catastrophic, national-security, safety, or large-scale economic consequences need evidence proportionate to the harm that failure could cause.
Practical focus
- Define the critical properties and unacceptable loss
- Reduce complexity and trusted computing dependencies
- Select assurance methods based on consequence and uncertainty
- Preserve assurance through configuration and lifecycle control
Common mistakes
- Calling a system high assurance because it uses encryption
- Adding documentation without reducing uncertainty
- Ignoring supply-chain and operational trust
- Allowing unreviewed changes to invalidate the evidence base
Certification relevance
This subject appears in or supports the following certification bodies of knowledge: