Trustworthiness — Vocabulary

This document provides a definition of trustworthiness for systems and their associated services, along with a selected set of their characteristics.

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Published
Publication Date
21-Jul-2022
Current Stage
6060 - International Standard published
Due Date
15-Apr-2023
Completion Date
22-Jul-2022
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TECHNICAL ISO/IEC TS
SPECIFICATION 5723
First edition
2022-07
Trustworthiness — Vocabulary
Reference number
ISO/IEC TS 5723:2022(E)
© ISO/IEC 2022
---------------------- Page: 1 ----------------------
ISO/IEC TS 5723:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC TS 5723:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

3.1 Trustworthiness ................................................................................................................................................................................... 1

3.2 Selected trustworthiness characteristics ...................................................................................................................... 1

3.3 Selected supporting definitions .............................................................................................................................................. 4

Bibliography ................................................................................................................................................................................................................................ 7

Index .................................................................................................................................................................................................................................................... 9

iii
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 3 ----------------------
ISO/IEC TS 5723:2022(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for

the different types of document should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_

experts/refdocs).

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. Details of any patent rights identified during the development of the document will be in the

Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC

list of patent declarations received (see https://patents.iec.ch).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www.iso.org/

iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.

This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html and www.iec.ch/national-

committees.
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/IEC TS 5723:2022(E)
Introduction

Recent times have seen an increase in the complexity of integrating technology bringing together

various viewpoints. Some examples of this are the convergence of operational technologies (OT) and

information technologies (IT) as seen in the Internet of Things (IoT), the rise of big data and artificial

intelligence (AI).

The complexity as well as the criticality, from both a safety and a mission point of view, have given

rise to the need to communicate both the trustworthiness of products, services and technologies, and

the trustworthiness of organizations that are providing these. Having a common understanding of

the characteristics that can be used to describe trustworthiness and a common way of defining the

vocabulary and characteristics will allow stakeholders to make a judgement as to whether a product,

service or technology meets the stakeholder expectations.

This document is primarily intended for use horizontally in an IT domain. It is applicable to all domains

in which IT is used.

The terms and definitions in subclause 3.2 are extracted from the ISO and the IEC vocabulary

repositories. Where multiple definitions are given, those that best fit the current context of

trustworthiness have been selected. For some characteristics, multiple definitions have been retained

for different domains.
The terms and definitions in subclause 3.3 are provided for completeness.
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 5 ----------------------
TECHNICAL SPECIFICATION ISO/IEC TS 5723:2022(E)
Trustworthiness — Vocabulary
1 Scope

This document provides a definition of trustworthiness for systems and their associated services, along

with a selected set of their characteristics.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 Trustworthiness
3.1.1
trustworthiness
ability to meet stakeholders’ (3.3.8) expectations in a verifiable (3.3.12) way

Note 1 to entry: Depending on the context or sector, and also on the specific product or service, data, technology

and process used, different characteristics apply and need verification to ensure stakeholders’ expectations are

met.

Note 2 to entry: Characteristics of trustworthiness include, for instance, accountability (3.2.1), accuracy (3.2.2),

authenticity (3.2.3), availability (3.2.4), controllability (3.2.5), integrity (3.2.7, 3.2.8), privacy (3.2.9), quality

(3.2.10, 3.2.11), reliability (3.2.12, 3.2.13), resilience (3.2.14, 3.2.15), robustness (3.2.16), safety (3.2.17), security

(3.2.18), transparency (3.2.19, 3.2.20) and usability (3.2.21).

Note 3 to entry: Trustworthiness is an attribute that can be applied to services, products, technology, data and

information as well as to organizations.

Note 4 to entry: Verifiability (3.3.12) includes measurability (3.3.5) and demonstrability by means of objective

evidence (3.3.7).
3.2 Selected trustworthiness characteristics
3.2.1
accountability
state of being accountable (3.3.1)

Note 1 to entry: Accountability relates to an allocated responsibility. The responsibility can be based on

regulation or agreement or through assignment as part of delegation.

Note 2 to entry: For systems (3.3.10), accountability is a property that ensures that actions of an entity can be

traced uniquely to the entity (see ISO 7498-2:1989, 3.3.3).
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/IEC TS 5723:2022(E)

Note 3 to entry: In a governance context, accountability is the obligation of an individual or organization to

account for its activities, for completion of a deliverable or task, accept the responsibility for those activities,

deliverables or tasks, and to disclose the results in a transparent manner (see ISO/TS 21089:2018, 3.3.1).

[SOURCE: ISO/IEC 38500:2015, 2.3, modified — Note 2 to entry and Note 3 to entry have been added.]

3.2.2
accuracy

measure of closeness of results of observations, computations, or estimates to the true values or the

values accepted as being true
[SOURCE: ISO 17572-1:2022, 3.1]
3.2.3
authenticity
property that an entity is what it claims to be
[SOURCE: ISO/IEC 27000:2018, 3.6]
3.2.4
availability
property of being accessible and usable on demand by an authorized entity
[SOURCE: ISO/IEC 27000:2018, 3.7]
3.2.5
controllability

property of a system (3.3.10) that allows a human or another external agent to intervene in the system’s

functioning
Note 1 to entry: Such a system is heteronomous.

[SOURCE: ISO/IEC 22989:2022, 3.5.6, modified — The admitted term “controllable” has been removed

and “an AI system” has been changed to “a system”.]
3.2.6
information security

preservation of confidentiality, integrity (3.2.7, 3.2.8) and availability (3.2.4) of information

Note 1 to entry: In addition, other properties, such as authenticity (3.2.3), accountability (3.2.1), non- repudiation,

and reliability (3.2.12, 3.2.13) can also be involved.
[SOURCE: ISO 27000:2018, 3.28]
3.2.7
integrity

property whereby data have not been altered in an unauthorized manner since they were

created, transmitted, or stored
[SOURCE: ISO/IEC 29167-19:2019, 3.3, modified — The domain has been added.]
3.2.8
integrity
property of accuracy (3.2.2) and completeness
[SOURCE: ISO/IEC 27000:2018, 3.36, modified — The domain has been added.]
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/IEC TS 5723:2022(E)
3.2.9
privacy
freedom from intrusion
...

ISO/IEC TS 5723:2022(E)
ISO/IEC JTC 1/WG 13
Date: 2022-04-1206
Trustworthiness — Vocabulary
Publication stage
Warning for WDs and CDs

This document is not an ISO International Standard. It is distributed for review and comment. It is subject to

change without notice and may not be referred to as an International Standard.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of

which they are aware and to provide supporting documentation.
---------------------- Page: 1 ----------------------
ISO/IEC TS 5723:2022(E)
© ISO/IEC 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO/IEC 2022 – All rights reserved
ii © ISO/IEC 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC TS 5723:2022(E)
Contents

Foreword ................................................................................................................................................................ iv

Introduction ........................................................................................................................................................... v

1 Scope .......................................................................................................................................................... 1

2 Normative references .......................................................................................................................... 1

3 Terms and definitions .......................................................................................................................... 1

3.1 Trustworthiness ..................................................................................................................................... 1

3.2 Selected trustworthiness characteristics ..................................................................................... 1

3.3 Selected supporting definitions ....................................................................................................... 4

Bibliography .......................................................................................................................................................... 7

Foreword ................................................................................................................................................................ iv

Introduction ........................................................................................................................................................... v

1 Scope .......................................................................................................................................................... 1

2 Normative references .......................................................................................................................... 1

3 Terms and definitions .......................................................................................................................... 1

3.1 Trustworthiness ..................................................................................................................................... 1

3.2 Selected trustworthiness characteristics ..................................................................................... 1

3.3 Selected supporting definitions ....................................................................................................... 5

Bibliography .......................................................................................................................................................... 8

© ISO/IEC 2022 – All rights reserved iii
© ISO/IEC 2022 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/IEC TS 5723:2022(E)
Foreword

ISO (the International Organization for Standardization) is a and IEC (the International Electrotechnical

Commission) form the specialized system for worldwide federation of national

standardsstandardization. National bodies (that are members of ISO member bodies). The workor IEC

participate in the development of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has

been established has the right to be represented on that committee. Internationalby 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. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documentsdocument should be noted. This document was drafted in accordance

with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives 2 (see

www.iso.org/directives or www.iec.ch/members_experts/refdocs).

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. Details

of any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patentswww.iso.org/patents) or the IEC

list of patent declarations received (see https://patents.iec.ch).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the World

Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www.iso.org/iso/foreword.html) see www.iso.org/iso/foreword.html. In the IEC, see

www.iec.ch/understanding-standards.

This document was prepared by the Joint Technical Committee ISO/IEC JTC 1, Information

technologiestechnology.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.htmlwww.iso.org/members.html

and www.iec.ch/national-committees.
iv © ISO/IEC 2022 – All rights reserved
iv © ISO/IEC 2022 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/IEC TS 5723:2022(E)
Introduction

There has beenRecent times have seen an increase in the complexity of integrating technology bringing

together various viewpoints. Some examples of this are the convergence of operational technologies (OT)

and information technologies (IT) as seen in internetthe Internet of thingsThings (IoT), the rise of big

data and artificial intelligence (AI).

The complexity as well as the criticality, from both a safety and a mission point of view, hashave given

rise to the need to communicate both the trustworthiness of products, services, and technologies, and the

trustworthiness of organizations that are providing these. Having a common understanding of the

characteristics that can be used to describe trustworthiness and a common way to defineof defining the

vocabulary and characteristics towill allow stakeholders to make a judgement ifas to whether a product,

service, or technology meets the stakeholder expectations.

This document is primarily intended for use horizontally in an information technology IT domain and. It

is applicable to all domains wherein which IT is used.

The terms and definitions in Clause subclause 3.2 are extracted from the ISO and the IEC vocabulary

repositories. Where multiple definitions are given, those that were best fittingfit the current context of

trustworthiness have been selected. For some characteristics, multiple definitions have been retained for

different domains.
The terms and definitions in Clause subclause 3.3 are provided for completeness.
© ISO/IEC 2022 – All rights reserved v
© ISO/IEC 2022 – All rights reserved v
---------------------- Page: 5 ----------------------
TECHNICAL SPECIFICATION ISO/IEC TS 5723:2022(E)
Trustworthiness — Vocabulary
1 Scope

This document provides a definition of trustworthiness offor systems and their associated services, along

with a selected set of itstheir characteristics.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— — ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp

— — IEC Electropedia: available at https://www.electropedia.org/
3.1 Trustworthiness
3.1.1
trustworthiness

ability to meet stakeholders’ (3.3.9)(3.3.8) expectations in a verifiable (3.3.12)(3.3.12) way

Note 1 to entry: Depending on the context or sector, and also on the specific product or service, data, technology

and process used, different characteristics apply and need verification to ensure stakeholders’ expectations are met.

Note 2 to entry: Characteristics of trustworthiness include, for instance, accountability (3.2.1),(3.2.1), accuracy

(3.2.2),(3.2.2), authenticity (3.2.3),(3.2.3), availability (3.2.4),(3.2.4), controllability (3.2.5),(3.2.5), integrity (3.2.7,

3.2.8),(3.2.7, 3.2.8), privacy (3.2.9),(3.2.9), quality (3.2.10, 3.2.11),(3.2.10, 3.2.11), reliability (3.2.12, 3.2.13),(3.2.12,

3.2.13), resilience (3.2.14, 3.2.15),(3.2.14, 3.2.15), robustness (3.2.16),(3.2.16), safety (3.2.17),(3.2.17), security

(3.2.18),(3.2.18), transparency (3.2.19, 3.2.20)(3.2.19, 3.2.20) and usability (3.2.21).(3.2.21).

Note 3 to entry: Trustworthiness is an attribute that can be applied to services, products, technology, data and

information as well as to organizations.

Note 4 to entry: Verifiability (3.3.12)(3.3.12) includes measurability (3.3.1)(3.3.5) and demonstrability by means of

objective evidence. (3.3.7).
3.2 Selected trustworthiness characteristics
3.2.1 3.2.1
accountability
state of being accountable (3.3.1) (3.3.1)
© ISO/IEC 2022 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO/IEC TS 5723:2022(E)

Note 1 to entry: Accountability relates to an allocated responsibility. The responsibility can be based on regulation

or agreement or through assignment as part of delegation.

Note 2 to entry: For systems, it (3.3.10), accountability is a property that ensures that actions of an entity can be

traced uniquely to the entity [SOURCE:(see ISO 7498-2:1989, 3.3.3, modified ”For systems, it is a” is added in front

of “property”].).

Note 3 to entry: In a governance context, itaccountability is the obligation of an individual or organization to account

for its activities, for completion of a deliverable or task, accept the responsibility for those activities, deliverables or

tasks, and to disclose the results in a transparent manner [SOURCE:(see ISO/TS 21089: 2018, 3.3.1, modified ” In a

governance context, it is the” is added in front of “obligation”].).

[SOURCE: ISO/IEC 38500:2015, 2.3, modified --— Note 2 to entry and Note 3 to entry have been added.]

3.2.2 3.2.2
accuracy

measure of closeness of results of observations, computations, or estimates to the true values or the

values accepted as being true
[SOURCE: ISO 17572-1:2015, 2.1.1]
3.2.3 3.2.3
authenticity
property that an entity is what it claims to be
[SOURCE: ISO/IEC 27000:2018, 3.6]
3.2.4 3.2.4
availability
property of being accessible and usable on demand by an authorized entity
[SOURCE: ISO/IEC 27000:2018, 3.7]
3.2.5 3.2.5
controllability

property of a system (3.3.10) that allows a human or otheranother external agent canto intervene in the

system’s functioning
Note 1 to entry: Such a system is heteronomous.

[SOURCE: ISO/IEC 22989: ——, , 3.5.6, modified — The admitted term of “controllable” has been

removed and “an AI system” has been changed to “a system”.]
3.2.6 3.2.6
information security
preservation of confidentia
...

FINAL
TECHNICAL ISO/IEC DTS
DRAFT
SPECIFICATION 5723
ISO/IEC JTC 1
Trustworthiness — Vocabulary
Secretariat: ANSI
Voting begins on:
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/IEC DTS 5723:2022(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO/IEC 2022
---------------------- Page: 1 ----------------------
ISO/IEC DTS 5723:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH­1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC DTS 5723:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

3.1 Trustworthiness ................................................................................................................................................................................... 1

3.2 Selected trustworthiness characteristics ...................................................................................................................... 1

3.3 Selected supporting definitions .............................................................................................................................................. 4

Bibliography ................................................................................................................................................................................................................................ 7

Index .................................................................................................................................................................................................................................................... 9

iii
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 3 ----------------------
ISO/IEC DTS 5723:2022(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 non­governmental, in liaison with ISO and IEC, also take part in the

work.

The procedures used to develop this document and those intended for its further maintenance

are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria

needed for the different types of document should be noted. This document was drafted in

accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or

www.iec.ch/members_experts/refdocs).

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. Details of any patent rights identified during the development of the document will be in the

Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC

list of patent declarations received (see https://patents.iec.ch).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see

www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding­standards.

This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology.

Any feedback or questions on this document should be directed to the user’s national standards

body. A complete listing of these bodies can be found at www.iso.org/members.html and

www.iec.ch/national­committees.
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/IEC DTS 5723:2022(E)
Introduction

Recent times have seen an increase in the complexity of integrating technology bringing together

various viewpoints. Some examples of this are the convergence of operational technologies (OT) and

information technologies (IT) as seen in the Internet of Things (IoT), the rise of big data and artificial

intelligence (AI).

The complexity as well as the criticality, from both a safety and a mission point of view, have given

rise to the need to communicate both the trustworthiness of products, services and technologies, and

the trustworthiness of organizations that are providing these. Having a common understanding of

the characteristics that can be used to describe trustworthiness and a common way of defining the

vocabulary and characteristics will allow stakeholders to make a judgement as to whether a product,

service or technology meets the stakeholder expectations.

This document is primarily intended for use horizontally in an IT domain. It is applicable to all domains

in which IT is used.

The terms and definitions in subclause 3.2 are extracted from the ISO and the IEC vocabulary

repositories. Where multiple definitions are given, those that best fit the current context of

trustworthiness have been selected. For some characteristics, multiple definitions have been retained

for different domains.
The terms and definitions in subclause 3.3 are provided for completeness.
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 5 ----------------------
TECHNICAL SPECIFICATION ISO/IEC DTS 5723:2022(E)
Trustworthiness — Vocabulary
1 Scope

This document provides a definition of trustworthiness for systems and their associated services, along

with a selected set of their characteristics.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 Trustworthiness
3.1.1
trustworthiness
ability to meet stakeholders’ (3.3.8) expectations in a verifiable (3.3.12) way

Note 1 to entry: Depending on the context or sector, and also on the specific product or service, data, technology

and process used, different characteristics apply and need verification to ensure stakeholders’ expectations are

met.

Note 2 to entry: Characteristics of trustworthiness include, for instance, accountability (3.2.1), accuracy (3.2.2),

authenticity (3.2.3), availability (3.2.4), controllability (3.2.5), integrity (3.2.7, 3.2.8), privacy (3.2.9), quality

(3.2.10, 3.2.11), reliability (3.2.12, 3.2.13), resilience (3.2.14, 3.2.15), robustness (3.2.16), safety (3.2.17), security

(3.2.18), transparency (3.2.19, 3.2.20) and usability (3.2.21).

Note 3 to entry: Trustworthiness is an attribute that can be applied to services, products, technology, data and

information as well as to organizations.

Note 4 to entry: Verifiability (3.3.12) includes measurability (3.3.5) and demonstrability by means of objective

evidence (3.3.7).
3.2 Selected trustworthiness characteristics
3.2.1
accountability
state of being accountable (3.3.1)

Note 1 to entry: Accountability relates to an allocated responsibility. The responsibility can be based on

regulation or agreement or through assignment as part of delegation.

Note 2 to entry: For systems (3.3.10), accountability is a property that ensures that actions of an entity can be

traced uniquely to the entity (see ISO 7498-2:1989, 3.3.3).
© ISO/IEC 2022 – All rights reserved
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ISO/IEC DTS 5723:2022(E)

Note 3 to entry: In a governance context, accountability is the obligation of an individual or organization to

account for its activities, for completion of a deliverable or task, accept the responsibility for those activities,

deliverables or tasks, and to disclose the results in a transparent manner (see ISO/TS 21089:2018, 3.3.1).

[SOURCE: ISO/IEC 38500:2015, 2.3, modified — Note 2 to entry and Note 3 to entry have been added.]

3.2.2
accuracy

measure of closeness of results of observations, computations, or estimates to the true values or the

values accepted as being true
[SOURCE: ISO 17572-1:2015, 2.1.1]
3.2.3
authenticity
property that an entity is what it claims to be
[SOURCE: ISO/IEC 27000:2018, 3.6]
3.2.4
availability
property of being accessible and usable on demand by an authorized entity
[SOURCE: ISO/IEC 27000:2018, 3.7]
3.2.5
controllability

property of a system (3.3.10) that allows a human or another external agent to intervene in the system’s

functioning
Note 1 to entry: Such a system is heteronomous.

[SOURCE: ISO/IEC 22989: —, 3.5.6, modified — The admitted term “controllable” has been removed

and “an AI system” has been changed to “a system”.]
3.2.6
information security

preservation of confidentiality, integrity (3.2.7, 3.2.8) and availability (3.2.4) of information

Note 1 to entry: In addition, other properties, such as authenticity (3.2.3), accountability (3.2.1), non­ repudiation,

and reliability (3.2.12, 3.2.13) can also be involved.
[SOURCE: ISO 27000:2018, 3.28]
3.2.7
integrity

property whereby data have not been altered in an unauthorized manner since they were

created, transmitted, or stored
[SOURCE: ISO/IEC 29167-19:2019, 3.3, modified — The domain has been added.]
3.2.8
integrity
property of accuracy (3.2.2) and completeness
[SOURCE: ISO/IEC 27000:2018, 3.36, modified — The domain has been added.]
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