Which Zero Trust concept continuously evaluates trust signals and adjusts a subject's permissions in real time, thereby shrinking the scope of potential threats?
Policy-driven access control
Implicit trust zones
Policy Administrator
Adaptive identity
Adaptive identity is a control-plane capability that monitors contextual signals-such as user behaviour, device posture, location, and time-and dynamically changes authentication and authorization requirements. By reassessing trust throughout a session, it enforces least privilege and limits an attacker's ability to move laterally.
The Policy Administrator simply establishes or tears down the communication path between the subject and the resource based on decisions from the Policy Engine; it does not perform risk analysis or change permissions on its own. "Implicit trust zones" conflict with the Zero Trust principle of never trust, always verify. "Policy-driven access control" refers broadly to enforcing predefined rules; it may leverage adaptive identity but is not itself the mechanism that performs continuous trust evaluation.
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