ISO/IEC 27017:2015 / ITU-T X.1631 – Information technology — Security techniques — Code of practice for information security controls based on ISO/IEC 27002 for cloud services – Brief Overview of Standard.


“ISO/IEC 27017:2015 gives guidelines for  information security controls applicable to the provision and use of  cloud services by providing: additional implementation guidance for relevant controls specified in ISO/IEC 27002; additional controls with implementation guidance that specifically relate to cloud services. This Recommendation | International Standard provides controls and  implementation guidance for both cloud service providers and cloud  service customers.”


This standard provides guidance on the information security aspects of cloud computing, recommending and assisting with the implementation of cloud-specific information security controls supplementing the guidance in ISO/IEC 27002:2013 and other ISO27k standards.

Scope and purpose

The code of practice provides additional information security controls implementation advice beyond that provided in ISO/IEC 27002:2013, in the cloud computing context.

The standard advises both cloud service customers and cloud service providers, with the primary guidance laid out side-by-side in each section. For instance, section 6.1.1 on information security roles and responsibilities says, in addition to section 6.1.1 of ISO/IEC 27002:2013:

Cloud service customer

The cloud service customer should agree with the cloud service provider on an appropriate allocation of information security roles and responsibilities, and confirm that it can fulfill its allocated roles and responsibilities. The information security roles and responsibilities of both parties should be stated in an agreement. The cloud service customer should identify and manage its relationship with the customer support and care function of the cloud service provider.

Cloud service provider

The cloud service provider should agree to and document an appropriate allocation of information security roles and responsibilities with its cloud service customers, its cloud service providers, and its suppliers.

Normative standards

The standard cites ISO/IEC 27000 and 27002:2013, of course, plus ISO/IEC 17788 (Cloud computing – Overview and vocabulary) and ISO/IEC 17789 (Cloud computing – Reference architecture). Curiously, although ISO/IEC 27001 is noted in the bibliography, it is not considered ‘normative’ i.e. essential reading: although unusual, it is possible to make use of the controls recommended by ISO/IEC 27002 without also having an ISMS.

Status of the standard

The standard was developed jointly by ISO/IEC and ITU and hence is dual-numbered as both ISO/IEC 27017 and ITU-T X.1631 with identical content.

The first edition was published at the end of 2015.

A second edition is being drafted. It will be updated to “capture a full set of guidelines for information security controls applicable to cloud services, both from the 3rd edition of ISO/IEC 27002 and any additional controls specific related specifically to cloud services.” SC 27 and ITU-T are once again collaborating on this.

For purchasing an official copy of this standard, please visit

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