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Pre-execution control

Authorization, human review, and fail-closed

An authorization is specific to an action and context; human review must also have criteria and a traceable outcome.

Objectives

  • Describe a bounded authorization.
  • Know when to stop or escalate.
Duration
10 min
Level
Intermediate

Prerequisites

  • Intent, context, policy, and decision

Concepts

Concepts

  • Authorization

    An explicit decision that permits a given action within a defined scope, duration, and context.

  • Human review

    A decision point with documented information, accountability, and outcome; it is not a magic formula.

  • Fail-closed

    When there is failure, ambiguity, or missing critical data, no new permission is granted.

  • Separation and revocation

    Request, approval, execution, and review are separate responsibilities when necessary; an authorization must be revocable or stoppable within its scope.

Visual guide

Deciding without expanding

  1. Check the conditions.
  2. Separate request, approval, and execution.
  3. Allow, deny, or escalate.
  4. Limit scope and duration.
  5. Revoke or stop when the condition disappears.

Synthetic example

Synthetic example

The policy requires human review, but no reviewer is available. The system refuses to continue.

An unavailable review is not an authorization.

Lesson scope

This lesson describes minimum conditions for traceable authorization and escalation.

What this lesson does not demonstrate

It confirms neither the quality of an actual review, enforcement, nor the impossibility of bypass.

Check question

Which outcome follows fail-closed?

Which outcome follows fail-closed?

Choose an answer to read its feedback.

Local checklist

Authorization boundary

Draft a fictional authorization that does not overreach.

This exercise grants no real authorization.

Sources and limitations

Sources and limitations

Source reference
codex/learning-hub-v3-autonomous-controls
Source version
learning-v3
  • Zero Trust ArchitectureNIST-SP800-207
    Publisher
    National Institute of Standards and Technology (NIST)
    Version or date
    Final, 2020-08
    Link verified on
    2026-08-13
    Scope used
    Explicit access decisions and continuous context evaluation.
    Limitation
    The document guarantees no particular enforcement.
  • Shifting the Balance of Cybersecurity Risk: Principles and Approaches for Secure by Design SoftwareCISA-SBD-2023
    Publisher
    CISA and international partners
    Version or date
    Updated 2023-10
    Link verified on
    2026-08-13
    Scope used
    Accountability, secure-by-default values, and transparency of outcomes.
    Limitation
    High-level principles, not a control audit.