Key Takeaways
- 0127017 is short — 37 cloud-specific controls supplementing 27002. It is the cleanest articulation of the shared responsibility model an auditor will accept.
- 02Highest-leverage controls: shared roles (CLD.6.3.1), customer-asset removal at termination (CLD.8.1.5), virtual segregation (CLD.9.5.1), VM hardening (CLD.9.5.2), customer-side admin operations (CLD.12.1.5), monitoring of provider-emitted logs (CLD.12.4.5).
- 03Major CSPs publish 27017 reports — read them as evidence of provider-side controls only. Your portion of every shared control still requires its own evidence.
- 04Most common audit finding: 'reliance on provider with no customer-side evidence.' Eliminate it with one page per service that explicitly documents the split.
ISO/IEC 27017 is a code of practice that supplements ISO/IEC 27002 with cloud-specific guidance. It is short — 37 controls — and it is the cleanest articulation of the shared responsibility model an auditor will accept.
Controls that consistently pay back
- 01CLD.6.3.1 — Shared roles and responsibilities, documented per service
- 02CLD.8.1.5 — Removal of cloud service customer assets at service termination
- 03CLD.9.5.1 — Segregation in virtual computing environments
- 04CLD.9.5.2 — Virtual machine hardening baselines
- 05CLD.12.1.5 — Administrator's operational security from the customer side
- 06CLD.12.4.5 — Monitoring of cloud services with attention to provider logs
How to consume the provider's controls
Major CSPs publish 27017 audit reports. Read them — but treat them as evidence of provider-side controls only. Your portion of every shared control still requires its own evidence: a hardening baseline, a termination procedure, a monitoring playbook.
The most common audit finding is 'reliance on provider with no customer-side evidence.' Avoid that one with a single page per service that documents the split.
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