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Security in depth · Unit 23 · Lesson 11 of 14

Response actions need authority

Use an approval matrix before a response affects a shared service.

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  • Identify who may authorize the proposed action and what evidence they need.

A confident alert is not an approval signature.

Match authority to the action

Containment authority is the defined permission to approve a response for a particular scope and condition. A responder may be authorized to isolate an employee workstation yet need coordination before interrupting a service used by many people. The detection’s confidence and the action’s consequences are separate inputs.

Assume a fictional venue uses a shared account for ticket validation. Its response policy distinguishes personal workstations from shared services. The supplied record contains no condition that invokes an emergency override.

Detection evidence → Authorized decision → Bounded responseDetection evidenceAuthorized decisionBounded response
Evidence informs a decision, but the scope of authority and operational consequences determine who may approve it.

Supplied approval matrix

  • A1: Analysts may approve temporary isolation of personal workstations under the workstation procedure.
  • A2: Disabling a shared service account requires the incident lead and service owner to agree on continuity and reversal conditions.
  • A3: A high-confidence detector proposes disabling the ticket-validation account. The backup validation process has not been confirmed available.

Make the right decision available

A3 belongs to A2’s scope. A1 cannot authorize it merely because the same analyst received the alert. The appropriate next step is prompt escalation with the suspected activity, affected dependency, and unknown continuity status.

The decision request should say what the proposed restriction aims to stop, what legitimate operation could be interrupted, who will monitor the result, and when to reassess. Reversal must depend on agreed conditions rather than elapsed time alone.

This does not mean waiting passively for certainty. Use the organization’s documented urgent coordination route; if its emergency rules are unclear, record that preparedness gap for correction.

Model request: Shared ticket validation may be affected. Incident lead and owner: assess the proposed restriction and confirm continuity before the decision.

Terms you met

Containment authority

Check yourself

No timer. No penalties. Read the explanation and try again whenever you like.

  1. What follows from A1-A3?

    Show the answer

    Correct answer: Escalate promptly to the incident lead and service owner with impact and continuity information. The proposal affects a shared service, so the stated approval route applies. Escalation can be urgent without inventing broader authority.

Try it

  • WriteWrite a decision request naming the shared service, proposed action, approving roles, current evidence, and reassessment time. State that high detector confidence does not expand the workstation policy.
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