ISO/IEC 27001:2022 · Technological control · New in 2022
ISO 27001 Annex A 8.11: Data masking
Quick answer
ISO 27001 Annex A 8.11 (Data masking) is a technological control introduced in the 2022 edition. Use masking, pseudonymisation or anonymisation to limit exposure of sensitive data, including PII.
What auditors look for
Auditors check that 8.11 is either justified as not applicable in your Statement of Applicability or implemented and working. Typical evidence includes:
- Masking rules
- Masked test and analytics datasets
- Access controls on unmasked data
How to implement 8.11 in practice
- Never copy live personal data into test without masking
- Mask data in support tools
- Limit who can view unmasked data
- Name an owner for 8.11, decide how often it runs and file evidence each time, so the control is audit-ready all year.
How 8.11 supports GDPR
This control helps demonstrate GDPR Art. 25, 32(1)(a). Map it once in your control matrix so the same evidence supports both ISO 27001 and GDPR accountability. See the GDPR compliance checklist.
Recording 8.11 in the Statement of Applicability
List 8.11 with whether it applies, the reason (usually the risks it treats or a legal or contractual requirement), its implementation status and where the evidence lives. If you exclude it, explain why none of your risks or obligations require it.