SIST EN ISO/IEC 27017:2021

SLOVENSKI STANDARD
oSIST prEN ISO/IEC 27017:2020
01-november-2020
Informacijska tehnologija - Varnostne tehnike - Pravila obnašanja pri nadzoru
varnosti informacij, ki temeljijo na ISO/IEC 27002 za storitve v oblaku (ISO/IEC
27017:2015)
Information technology - Security techniques - Code of practice for information security
controls based on ISO/IEC 27002 for cloud services (ISO/IEC 27017:2015)
Informationstechnik - Sicherheitsverfahren - Anwendungsleitfaden für
Informationssicherheitsmaßnahmen basierend auf ISO/IEC 27002 für Cloud Dienste
(ISO/IEC 27017:2015)
Technologies de l'information - Techniques de sécurité - Code de pratique pour les
contrôles de sécurité de l'information fondés sur l'ISO/IEC 27002 pour les services du
nuage (ISO/IEC 27017:2015)
Ta slovenski standard je istoveten z: prEN ISO/IEC 27017
ICS:
03.100.70 Sistemi vodenja Management systems
35.030 Informacijska varnost IT Security
oSIST prEN ISO/IEC 27017:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO/IEC 27017:2020

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oSIST prEN ISO/IEC 27017:2020

INTERNATIONAL ISO/IEC
STANDARD 27017
First edition
2015-12-15


Information technology — Security
techniques — Code of practice for
information security controls based on
ISO/IEC 27002 for cloud services
Technologies de l'information — Techniques de sécurité — Code de
pratique pour les contrôles de sécurité de l'information fondés sur
l'ISO/IEC 27002 pour les services du nuage





Reference number
ISO/IEC 27017:2015(E)
©
ISO/IEC 2015

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ISO/IEC 27017:2015(E)

COPYRIGHT PROTECTED DOCUMENT


©  ISO/IEC 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any
means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission.
Permission can be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland

ii © ISO/IEC 2015 – All rights reserved

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ISO/IEC 27017:2015(E)

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 27017 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 27, IT Security techniques, in collaboration with ITU-T. The identical text is published as
ITU-T. X.1631 (07/2015).
© ISO/IEC 2015 – All rights reserved iii

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I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n


X.1631
ITU-T
(07/2015)
TELECOMMUNICATION
STANDARDIZATION SECTOR
OF ITU

SERIES X: DATA NETWORKS, OPEN SYSTEM
COMMUNICATIONS AND SECURITY
Cloud computing security – Cloud computing security
design


Information technology – Security techniques –
Code of practice for information security
controls based on ISO/IEC 27002 for cloud
services

Recommendation ITU-T X.1631

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ITU-T X-SERIES RECOMMENDATIONS
DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY

PUBLIC DATA NETWORKS X.1–X.199
OPEN SYSTEMS INTERCONNECTION X.200–X.299
INTERWORKING BETWEEN NETWORKS X.300–X.399
MESSAGE HANDLING SYSTEMS X.400–X.499
DIRECTORY X.500–X.599
OSI NETWORKING AND SYSTEM ASPECTS X.600–X.699
OSI MANAGEMENT X.700–X.799
SECURITY X.800–X.849
OSI APPLICATIONS X.850–X.899
OPEN DISTRIBUTED PROCESSING X.900–X.999
INFORMATION AND NETWORK SECURITY
General security aspects X.1000–X.1029
Network security X.1030–X.1049
Security management X.1050–X.1069
Telebiometrics X.1080–X.1099
SECURE APPLICATIONS AND SERVICES
Multicast security X.1100–X.1109
Home network security X.1110–X.1119
Mobile security X.1120–X.1139
Web security X.1140–X.1149
Security protocols X.1150–X.1159
Peer-to-peer security X.1160–X.1169
Networked ID security X.1170–X.1179
IPTV security X.1180–X.1199
CYBERSPACE SECURITY
Cybersecurity X.1200–X.1229
Countering spam X.1230–X.1249
Identity management X.1250–X.1279
SECURE APPLICATIONS AND SERVICES
Emergency communications X.1300–X.1309
Ubiquitous sensor network security X.1310–X.1339
PKI related Recommendations X.1340–X.1349
CYBERSECURITY INFORMATION EXCHANGE
Overview of cybersecurity X.1500–X.1519
Vulnerability/state exchange X.1520–X.1539
Event/incident/heuristics exchange X.1540–X.1549
Exchange of policies X.1550–X.1559
Heuristics and information request X.1560–X.1569
Identification and discovery X.1570–X.1579
Assured exchange X.1580–X.1589
CLOUD COMPUTING SECURITY
Overview of cloud computing security X.1600–X.1601
Cloud computing security design X.1602–X.1639
Cloud computing security best practices and guidelines X.1640–X.1659
Cloud computing security implementation X.1660–X.1679
Other cloud computing security X.1680–X.1699

For further details, please refer to the list of ITU-T Recommendations.

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INTERNATIONAL STANDARD ISO/IEC 27017
RECOMMENDATION ITU-T X.1631
Information technology – Security techniques – Code of practice for information security
controls based on ISO/IEC 27002 for cloud services



Summary
Recommendation ITU-T X.1631 | ISO/IEC 27017 provides 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.


History
*
Edition Recommendation Approval Study Group Unique ID
1.0 ITU-T X.1631 2015-07-14 17 11.1002/1000/12490





____________________
*
To access the Recommendation, type the URL http://handle.itu.int/ in the address field of your web browser, followed by the
Recommendation's unique ID. For example, http://handle.itu.int/11.1002/1000/11830-en.
 Rec. ITU-T X.1631 (07/2015) i

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FOREWORD
The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of
telecommunications, information and communication technologies (ICTs). The ITU Telecommunication
Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical,
operating and tariff questions and issuing Recommendations on them with a view to standardizing
telecommunications on a worldwide basis.
The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes
the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics.
The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1.
In some areas of information technology which fall within ITU-T's purview, the necessary standards are
prepared on a collaborative basis with ISO and IEC.



NOTE
In this Recommendation, the expression "Administration" is used for conciseness to indicate both a
telecommunication administration and a recognized operating agency.
Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain
mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the
Recommendation is achieved when all of these mandatory provisions are met. The words "shall" or some other
obligatory language such as "must" and the negative equivalents are used to express requirements. The use of
such words does not suggest that compliance with the Recommendation is required of any party.




INTELLECTUAL PROPERTY RIGHTS
ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve
the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or
applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of
the Recommendation development process.
As of the date of approval of this Recommendation, ITU had not received notice of intellectual property,
protected by patents, which may be required to implement this Recommendation. However, implementers are
cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB
patent database at http://www.itu.int/ITU-T/ipr/.



 ITU 2015
All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior
written permission of ITU.
ii Rec. ITU-T X.1631 (07/2015)

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CONTENTS
Page
1 Scope . 1
2 Normative references. 1
2.1 Identical Recommendations | International Standards . 1
2.2 Additional References . 1
3 Definitions and abbreviations . 1
3.1 Terms defined elsewhere . 1
3.2 Abbreviations . 2
4 Cloud sector-specific concepts . 2
4.1 Overview . 2
4.2 Supplier relationships in cloud services . 2
4.3 Relationships between cloud service customers and cloud service providers . 3
4.4 Managing information security risks in cloud services . 3
4.5 Structure of this standard . 3
5 Information security policies . 4
5.1 Management direction for information security . 4
6 Organization of information security. 5
6.1 Internal organization . 5
6.2 Mobile devices and teleworking . 6
7 Human resource security . 6
7.1 Prior to employment . 6
7.2 During employment . 6
7.3 Termination and change of employment . 7
8 Asset management . 7
8.1 Responsibility for assets . 7
8.2 Information classification . 8
8.3 Media handling . 8
9 Access control . 8
9.1 Business requirements of access control . 8
9.2 User access management . 9
9.3 User responsibilities . 10
9.4 System and application access control . 10
10 Cryptography . 11
10.1 Cryptographic controls . 11
11 Physical and environmental security . 12
11.1 Secure areas . 12
11.2 Equipment . 12
12 Operations security . 13
12.1 Operational procedures and responsibilities . 13
12.2 Protection from malware . 14
12.3 Backup . 14
12.4 Logging and monitoring . 15
12.5 Control of operational software . 16
12.6 Technical vulnerability management . 16
12.7 Information systems audit considerations . 17
13 Communications security . 17
13.1 Network security management . 17
13.2 Information transfer. 17
14 System acquisition, development and maintenance . 18
14.1 Security requirements of information systems . 18
14.2 Security in development and support processes . 18
 Rec. ITU-T X.1631 (07/2015) iii

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Page
14.3 Test data . 19
15 Supplier relationships . 19
15.1 Information security in supplier relationships . 19
15.2 Supplier service delivery management . 20
16 Information security incident management . 20
16.1 Management of information security incidents and improvements. 20
17 Information security aspects of business continuity management . 22
17.1 Information security continuity . 22
17.2 Redundancies . 22
18 Compliance . 22
18.1 Compliance with legal and contractual requirements . 22
18.2 Information security reviews . 23
Annex A – Cloud service extended control set . 25
Annex B – References on information security risk related to cloud computing . 29
Bibliography . 30




iv Rec. ITU-T X.1631 (07/2015)

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Introduction
The guidelines contained within this Recommendation | International Standard are in addition to and complement the
guidelines given in ISO/IEC 27002.
Specifically, this Recommendation | International Standard provides guidelines supporting the implementation of
information security controls for cloud service customers and cloud service providers. Some guidelines are for cloud
service customers who implement the controls, and others are for cloud service providers to support the implementation
of those controls. The selection of appropriate information security controls and the application of the implementation
guidance provided, will depend on a risk assessment and any legal, contractual, regulatory or other cloud-sector specific
information security requirements.

 Rec. ITU-T X.1631 (07/2015) v

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ISO/IEC 27017:2015 (E)
INTERNATIONAL STANDARD
ITU-T RECOMMENDATION
Information technology – Security techniques – Code of practice for information security
controls based on ISO/IEC 27002 for cloud services
1 Scope
This Recommendation | International Standard 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.
2 Normative references
The following Recommendations and International Standards contain provisions which, through reference in this text,
constitute provisions of this Recommendation | International Standard. At the time of publication, the editions indicated
were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this
Recommendation | International Standard are encouraged to investigate the possibility of applying the most recent edition
of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of currently valid
International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently valid
ITU-T Recommendations.
2.1 Identical Recommendations | International Standards
– Recommendation ITU-T Y.3500 (in force) | ISO/IEC 17788: (in force), Information technology – Cloud
computing – Overview and vocabulary.
– Recommendation ITU-T Y.3502 (in force) | ISO/IEC 17789: (in force), Information technology – Cloud
computing – Reference architecture.
2.2 Additional References
– ISO/IEC 27000: (in force), Information technology – Security techniques – Information security
management systems – Overview and vocabulary.
– ISO/IEC 27002:2013, Information technology – Security techniques – Code of practice for information
security controls.
3 Definitions and abbreviations
3.1 Terms defined elsewhere
For the purposes of this Recommendation | International Standard, the terms and definitions given in ISO/IEC 27000,
Rec. ITU-T Y.3500 | ISO/IEC 17788, Rec. ITU-T Y.3502 | ISO/IEC 17789 and the following definitions apply:
3.1.1 The following term is defined in ISO 19440:
– capability: Quality of being able to perform a given activity.
3.1.2 The following terms are defined in ISO/IEC 27040:
– data breach: Compromise of security that leads to the accidental or unlawful destruction, loss, alteration,
unauthorized disclosure of, or access to protected data transmitted, stored, or otherwise processed.
– secure multi-tenancy: Type of multi-tenancy that employs security controls to explicitly guard against
data breaches and provides validation of these controls for proper governance.
NOTE 1 – Secure multi-tenancy exists when the risk profile of an individual tenant is no greater than it would be in a
dedicated, single-tenant environment.
NOTE 2 – In very secure environments, even the identity of the tenants is kept secret.
 Rec. ITU-T X.1631 (07/2015) 1

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3.1.3 The following term is defined in ISO/IEC 17203:
– virtual machine: The complete environment that supports the execution of guest software.
NOTE – A virtual machine is a full encapsulation of the virtual hardware, virtual disks, and the metadata associated
with it. Virtual machines allow multiplexing of the underlying physical machine through a software layer called a
hypervisor.
3.2 Abbreviations
For the purposes of this Recommendation | International Standard, the following abbreviations apply:
IaaS Infrastructure as a Service
PaaS Platform as a Service
PII Personally Identifiable Information
SaaS Software as a Service
SLA Service Level Agreement
VM Virtual Machine
4 Cloud sector-specific concepts
4.1 Overview
The use of cloud computing has changed how organizations should assess and mitigate information security risks because
of the significant changes in how computing resources are technically designed, operated and governed. This
Recommendation | International Standard provides additional cloud-specific implementation guidance based on
ISO/IEC 27002 and provides additional controls to address cloud-specific information security threats and risks
considerations.
Users of this Recommendation | International Standard should refer to clauses 5 to 18 in ISO/IEC 27002 for controls,
implementation guidance and other information. Because of the general applicability of ISO/IEC 27002, many of the
controls, implementation guidance and other information apply to both the general and cloud computing contexts of an
organization. For example, "6.1.2 Segregation of duties" of ISO/IEC 27002 provides a control that can be applied whether
the organization is acting as a cloud service provider or not. Additionally, a cloud service customer can derive
requirements for segregation of duties in the cloud environment from the same control, e.g., segregating the cloud service
customers' cloud service administrators and cloud service users.
As an extension to ISO/IEC 27002, this Recommendation | International Standard further provides cloud service specific
controls, implementation guidance and other information (see clause 4.5) that are intended to mitigate the risks that
accompany the technical and operational features of cloud services (see Annex B). The cloud service customers and the
cloud service providers can refer to ISO/IEC 27002 and this Recommendation | International Standard to select controls
with the implementation guidance, and add other controls if necessary. This process can be done by performing an
information security risk assessment and risk treatment in the organizational and business context where cloud services
are used or provided (see clause 4.4).
4.2 Supplier relationships in cloud services
ISO/IEC 27002 clause 15 "Supplier relationships" provides controls, implementation guidance and other information for
managing information security in supplier relationships. The provision and use of cloud services is a kind of supplier
relationship, where the cloud service customer is an acquirer, and the cloud service provider is a supplier. Therefore, the
clause applies to cloud service customers and cloud service providers.
Cloud service customers and cloud service providers can also form a supply chain. Suppose that a cloud service provider
provides an infrastructure capabilities type service. In addition, another cloud service provider can provide an application
capabilities type service. In this case, the second cloud service provider is a cloud service customer with respect to the
first, and a cloud service provider with respect to the cloud service customer using its service. This example illustrates
the case where this Recommendation | International Standard applies to an organization both as a cloud service customer
and as a cloud service provider. Because cloud service customers and cloud service providers form a supply chain through
the design and implementation of the cloud service(s), clause "15.1.3 Information and communication technology supply
chain" of ISO/IEC 27002 applies.
The multi-part International Standard ISO/IEC 27036, "Information security for supplier relationships", provides detailed
guidance on the information security in supplier relationships to the acquirer and supplier of products and services.
2 Rec. ITU-T X.1631 (07/2015)

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ISO/IEC 27017:2015 (E)
ISO/IEC 27036 Part 4 deals directly with the security of cloud services in supplier relationships. This standard is also
applicable to cl
...