Threat Modelling — Technology Wiki

Overview

Direct Answer

Threat modelling is a structured methodology for systematically identifying, categorising, and evaluating security risks within a system's architecture before or during development. It transforms abstract security concerns into concrete, prioritised threats that development teams can address proactively.

How It Works

Practitioners map system components, data flows, and trust boundaries, then apply frameworks such as STRIDE or PASTA to enumerate potential attack vectors at each point. Threats are assessed for likelihood and impact, resulting in a risk register that informs mitigation strategies and architectural decisions.

Why It Matters

Early identification of vulnerabilities reduces remediation costs significantly compared to post-deployment fixes. Organisations gain shared security understanding across technical and business stakeholders, enabling better resource allocation and compliance with regulatory expectations such as ISO 27001 or GDPR.

Common Applications

Financial services employ threat modelling to secure payment processing pipelines; healthcare organisations analyse electronic health record systems; software development teams incorporate it during architecture reviews; cloud infrastructure providers use it to evaluate multi-tenant isolation mechanisms.

Key Considerations

Effectiveness depends heavily on analyst expertise and completeness of system documentation; threat models require continuous updating as architectures evolve. Models can become overly complex or superficial without clear scope definition and stakeholder alignment.

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