ISO 27001 Annex A 5.34: Privacy and protection of PII

What Control 5.34 means in practice

Apply privacy and personal-information protections that reflect applicable obligations, purposes and risk. Test the control through the organisation's actual scope, decisions, ownership and operating records rather than relying on a policy reference alone.

For privacy and protection of pii, proportional design depends on the affected services, information, people and dependencies. The evidence below should be adapted to that real boundary.

Implementation steps

1. Step 1. Define ownership, scope and operating criteria for privacy and protection of pii.
2. Step 2. Implement privacy process that fits the organization’s risks, services and working practices.
3. Step 3. Integrate the activity with relevant change, exception and review processes.
4. Step 4. Review performance and improve the arrangement when risks, technology or obligations change.

What good implementation looks like

• recent samples show privacy and protection of pii operating across the intended scope
• exceptions and adverse results have accountable decisions and verified closure
• review results lead to measurable correction or improvement

Implementation evidence and effectiveness evidence

How an auditor may test Control 5.34

1. Select a representative in-scope service, asset or process.
2. Confirm the accountable owner and expected operation.
3. Trace a recent example: A real processing activity is traced through ownership, applicable obligations, safeguards, retention and accountable review.
4. Inspect the operating record and corroborating technical evidence.
5. Compare the design with evidence that the control operated effectively.
6. Follow an exception or adverse result through decision and closure.
7. Review trends, metrics and improvement decisions.

Questions to prepare for

• How is privacy and protection of pii implemented in practice?
• Who owns the activity and how are decisions approved?
• Show me a recent example from operation through review.
• How are exceptions, changes or overdue actions handled?

Practical examples

Illustrative decision and evidence record

Reviewer note: Test privacy and protection of pii with a recent real example; a current operating record normally reveals more than policy wording alone.

Useful performance and coverage measures

• in-scope coverage for privacy and protection of pii
• overdue exceptions or actions by age
• repeat findings identified through review

Approach for smaller and mature organizations

Smaller organization

Use a clear owner, a proportionate working record, built-in platform capability and a scheduled review. Sample real activity instead of creating duplicate paperwork for privacy and protection of pii.

Mature or complex organization

Define service-level ownership, automated coverage reporting, integrated workflow, risk-based exceptions and independent assurance across business units and technology platforms.

Practical implementation checklist

• □ Define ownership, scope and operating criteria for privacy and protection of pii.
• □ Implement privacy process that fits the organization’s risks, services and working practices.
• □ Integrate the activity with relevant change, exception and review processes.
• □ Review performance and improve the arrangement when risks, technology or obligations change.
• □ Sample evidence has been checked for operation and effectiveness.
• □ Exceptions have owners, rationale, review dates and closure evidence.

Common implementation mistakes

• documenting privacy and protection of pii without consistent operation
• unclear ownership or review frequency
• evidence that does not cover the full ISMS scope
• exceptions accepted without risk-based approval or follow-up

Related controls, clauses and resources