ISO/IEC 27017 FAQ Shared Responsibility

Start with the operational decision: define what Shared Responsibility means in your ISO/IEC 27017 scope, who owns it, and what record proves the decision is current.

In practice, this means documenting the split between the cloud provider and the customer before asking for evidence. NIST CSF 2.0 says cybersecurity roles and responsibilities for suppliers, customers, and partners should be established, communicated, and coordinated internally and externally, so the answer should show which party owns platform, service, configuration, access, monitoring, or incident duties.

The evidence should show the process operating. For this artifact, the strongest record usually includes shared-responsibility matrix, cloud service agreement, provider assurance, customer configuration evidence, access reviews, logs, and change records.

Avoid evidence that only repeats a requirement. A reviewer should be able to see the actual owner, date, system, supplier, AI system, service, incident, risk, or control sample behind the answer.

The person who can fund, operate, and correct the process should own the decision; governance should review consistency and exceptions.

For high-impact changes, approval should include the teams affected by the evidence: security, privacy, resilience, supplier management, AI governance, legal, risk, or business service owners as relevant.

Review it at planned intervals and whenever the underlying scope, service, supplier, control, risk, AI system, personal data flow, incident process, or customer commitment changes.

A stale record is worse than a short record. If the facts change, update the evidence and mark what changed so the next reviewer can trust the page.