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Security & Compliance Glossary

Threat Modeling

Threat modeling is a structured process for identifying potential threats, attacks, and vulnerabilities in a system early in design, then deciding how to mitigate them. It asks what you are building, what can go wrong, what you will do about it, and whether you did a good job. The output is a prioritized set of risks and countermeasures.

In practice

Done during design, threat modeling catches architectural flaws before they are written into code, when they are far cheaper to fix. Frameworks like STRIDE give teams a vocabulary for the categories of threats to consider.

It is most valuable for new features, major architecture changes, and AI systems, where the attack surface is unfamiliar. It frames the testing that follows, so testers know which threats matter most.

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Where it comes up

Threat modelling earns its place at design time, when changing an architecture still costs a conversation rather than a quarter. It is the cheapest security activity available and the most frequently skipped.

In compliance terms it supports secure development controls, and the evidence is simply the record: what was considered, what was decided, and what changed as a result.

Threat Modeling: common questions

When should we threat model?

When designing something new that handles sensitive data, changes trust boundaries, or exposes a new interface. Doing it for every ticket is theatre.

Do we need a formal methodology?

Not necessarily. STRIDE and similar frameworks help teams new to it, but a documented conversation about what could go wrong and what you did about it is worth more than an unused template.