Tools / Zero Trust Architecture (ZTA) Interview questions
When would you choose attribute-based access control (ABAC) over role-based (RBAC) in ZTA?
RBAC works well when an organization has a relatively stable set of roles that map cleanly to predictable resource access, it's simple to administer and reason about. But it struggles when access decisions need to account for context that a static role can't capture: time of day, device compliance, data classification, or location.
ABAC is the better fit when those contextual, dynamic factors matter, since it evaluates access against a combination of attributes at request time rather than a fixed role assignment. This aligns naturally with Zero Trust's continuous, context-aware evaluation model, where the same user's role shouldn't automatically grant the same access under different conditions.
Many large deployments end up using both: RBAC to establish a coarse baseline of what a role can ever be eligible for, and ABAC to further narrow that eligibility down at request time based on live context.
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