Tools / Microsoft Threat Modeling Tool (TMT) Interview questions
What are the main elements used in a TMT data flow diagram?
A TMT diagram is built from four core element types plus one boundary marker.
| Element | Represents |
| External Entity | A user or system outside your control (browser, third-party API) |
| Process | Code that receives, transforms, or produces data (a service, function, app) |
| Data Store | Persistent storage such as a database, file, or cache |
| Data Flow | An arrow showing data moving between two elements |
| Trust Boundary | A dashed line or box marking where trust level changes |
Everything TMT's rule engine reasons about is one of these five things, so knowing which type a shape is tells you roughly which STRIDE categories it can generate.
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