ISO/IEC 27001:2022 · Technological control
ISO 27001 Annex A 8.27: Secure system architecture and engineering principles
Quick answer
ISO 27001 Annex A 8.27 (Secure system architecture and engineering principles) is a technological control. Establish, document and apply secure engineering principles to system design.
What auditors look for
Auditors check that 8.27 is either justified as not applicable in your Statement of Applicability or implemented and working. Typical evidence includes:
- Architecture principles
- Design review records
- Reference architectures
How to implement 8.27 in practice
- Apply defence in depth and least privilege
- Review designs before build
- Document trust boundaries
- Name an owner for 8.27, decide how often it runs and file evidence each time, so the control is audit-ready all year.
Recording 8.27 in the Statement of Applicability
List 8.27 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.