What it means
Security concerns can be represented in the same models as mission and engineering decisions, improving consistency and exposing conflicts earlier than disconnected documents.
Why it matters
Models are most valuable when they support analysis and traceability, not when they merely reproduce diagrams already maintained elsewhere.
Practical focus
- Define a modeling purpose and authoritative source
- Represent trust boundaries, failure states, and security requirements
- Link model elements to evidence and decisions
- Control versions and validate model assumptions
Common mistakes
- Modeling everything without a decision need
- Treating a diagram as a complete model
- Separating security into an unconnected model
- Assuming model consistency guarantees implementation correctness
Certification relevance
This subject appears in or supports the following certification bodies of knowledge: