Tools / Zero Trust Architecture (ZTA) Interview questions
What is a Zero Trust policy engine, and what inputs does it use?
The policy engine is the component that evaluates each access request against organizational rules and produces an allow, deny, or step-up decision. It is the "brain" half of the Policy Decision Point.
Its inputs typically include:
- Identity attributes: role, department, authentication strength.
- Device posture: patch level, compliance status, managed vs. unmanaged.
- Resource sensitivity: classification of the data or system being requested.
- Threat intelligence: known bad IPs, active campaigns, leaked credential feeds.
- Behavioral history: whether this request pattern matches the subject's baseline.
No single input dominates; the engine weighs them together, which is why the same user can be allowed one request and denied a different one moments later.
The Zero Trust policy engine's output for a given request is:
Resource sensitivity as a policy input refers to:
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