Threat modeling is a structured process for identifying security threats before they become vulnerabilities. STRIDE categorises threats by type. Data Flow Diagrams (DFDs) map trust boundaries. Microsoft Threat Modeling Tool, OWASP Threat Dragon, and AI-assisted tools make the process accessible to all engineers. Every system design review should include a threat model.
Each stage in order — click any step to read what it does.
STRIDE threat categories with examples and mitigations for each.
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