ISO/IEC 27017 FAQ

ISO/IEC 27017:2015 is a code of practice for cloud service customers and providers. It adds cloud-specific implementation guidance to ISO/IEC 27002:2013 and seven cloud controls. It is not a law or a standalone management-system requirements standard.

Start with one named service and identify whether the organization is acting as the cloud service customer, the provider, or both in a supply chain. Then allocate each security activity to an identified party. The split can change across SaaS, PaaS, IaaS, managed services, provider chains, and negotiated terms.

Record the result in the agreement, responsibility matrix, configuration, operating procedure, or evidence request that controls the work. Assess applicable law, regulation, sector rules, and contract requirements separately; ISO/IEC 27017 says control selection depends on risk and those external requirements.

Collect evidence from the system or process that performs the control. For ISO/IEC 27017, that can include the signed service agreement, a service-specific responsibility matrix, provider assurance material, customer configuration exports, privileged-operation logs, monitoring tests, incident records, and termination tests.

Each record should identify the service, customer and provider entities, service model, regions, control boundary, period, owner, exceptions, and follow-up. A certificate or provider report supports only the entities, services, locations, controls, and period within its scope; it does not prove the customer's configuration. Where individual customer audits are impractical or could increase risk, the provider should offer sufficiently transparent independent evidence; if independent audit is impractical, the 2015 guidance calls for a disclosed self-assessment.

Use the same sequence for each question: define the service and provider chain, identify the customer and provider guidance, map the risk and external requirements, allocate the work, confirm both sides can perform it, and attach operating evidence.

If the service offers only fixed controls, compare them with the customer's requirements and add customer controls or record risk treatment for gaps. For example, a SaaS provider may operate the application and platform while the customer still manages user access, sharing settings, data use, and its response to alerts. Route unresolved contract, evidence, configuration, or supplier-chain gaps to someone authorized to accept the risk or fund correction.

A provider's generic responsibility diagram, certificate, or policy title is not enough. Tie each decision to a service boundary, accountable owner, evidence source, change trigger, and escalation path. Those five fields are implementation aids, not extra ISO controls.

Do not treat the standard as law, assume a provider certificate covers the customer's use, or cite ISO/IEC 27002:2022 as the normative base of the 2015 edition. ISO/IEC 27017:2015 references ISO/IEC 27002:2013; organizations may map newer control sets, but should document that mapping. Do not call ISO/IEC 27017 a standalone management-system certification: ISO/IEC 27001 supplies the certifiable ISMS requirements, and ISO itself does not issue certificates.

Review before selecting a service and when the service model, provider chain, architecture, data location, agreement, control boundary, assurance report, or customer commitment changes. Also confirm the applicable edition when a contract, certification basis, or standards owner changes.

Update every downstream record that depends on the decision, including the agreement, responsibility matrix, control configuration, risk treatment, evidence request, and next review date. Keep unresolved items visible as corrective action or accepted risk. As of 24 July 2026, ISO/IEC 27017:2015 remains current while Edition 2 is under publication and is expected to replace it; do not overwrite 2015 identifiers until the replacement is published and adopted for the assessment.