IEC 62443-2-1:2010

IEC 62443-2-1 ®
Edition 1.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Network and system security –
Part 2-1: Establishing an industrial automation and control system security
program
Réseaux industriels de communication – Sécurité dans les réseaux et les
systèmes –
Partie 2-1: Etablissement d’un programme de sécurité pour les systèmes
d’automatisation et de commande industrielles

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IEC 62443-2-1 ®
Edition 1.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Network and system security –

Part 2-1: Establishing an industrial automation and control system security

program
Réseaux industriels de communication – Sécurité dans les réseaux et les

systèmes –
Partie 2-1: Etablissement d’un programme de sécurité pour les systèmes

d’automatisation et de commande industrielles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XG
CODE PRIX
ICS 25.040.40; 33.040 ISBN 978-2-88912-037-6

– 2 – 62443-2-1  IEC:2010
CONTENTS
FOREWORD . 5
0 INTRODUCTION . 7
0.1 Overview . 7
0.2 A cyber security management system for IACS . 7
0.3 Relationship between this standard and ISO/IEC 17799 and ISO/IEC 27001 . 7
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, abbreviated terms, acronyms, and conventions . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms and acronyms . 14
3.3 Conventions . 16
4 Elements of a cyber security management system . 16
4.1 Overview . 16
4.2 Category: Risk analysis . 18
4.2.1 Description of category . 18
4.2.2 Element: Business rationale . 18
4.2.3 Element: Risk identification, classification and assessment . 18
4.3 Category: Addressing risk with the CSMS . 20
4.3.1 Description of category . 20
4.3.2 Element group: Security policy, organization and awareness . 20
4.3.3 Element group: Selected security countermeasures . 25
4.3.4 Element group: Implementation . 32
4.4 Category: Monitoring and improving the CSMS. 36
4.4.1 Description of category . 36
4.4.2 Element: Conformance . 36
4.4.3 Element: Review, improve and maintain the CSMS . 37
Annex A (informative) Guidance for developing the elements of a CSMS . 39
Annex B (informative) Process to develop a CSMS . 140
Annex C (informative) Mapping of requirements to ISO/IEC 27001 . 148
Bibliography . 156

Figure 1 – Graphical view of elements of a cyber security management system . 17
Figure 2 – Graphical view of category: Risk analysis. 18
Figure 3 – Graphical view of element group: Security policy, organization and
awareness . 20
Figure 4 – Graphical view of element group: Selected security countermeasures . 25
Figure 5 – Graphical view of element group: Implementation . 32
Figure 6 – Graphical view of category: Monitoring and improving the CSMS . 36
Figure A.1 – Graphical view of elements of a cyber security management system . 40
Figure A.2 – Graphical view of category: Risk analysis . 40
Figure A.3 – Reported attacks on computer systems through 2004 (source: CERT) . 44
Figure A.4 – Sample logical IACS data collection sheet . 57
Figure A.5 – Example of a graphically rich logical network diagram . 59

62443-2-1  IEC:2010 – 3 –
Figure A.6 – Graphical view of element group: Security policy, organization, and
awareness . 66
Figure A.7 – Graphical view of element group: Selected security countermeasures. 82
Figure A.8 – Reference architecture alignment with an example segmented
architecture. 90
Figure A.9 – Reference SCADA architecture alignment with an example segmented
architecture. 93
Figure A.10 – Access control: Account administration . 95
Figure A.11 – Access control: Authentication . 98
Figure A.12 – Access control: Authorization . 103
Figure A.13 – Graphical view of element group: Implementation . 106
Figure A.14 – Security level lifecycle model: Assess phase. 109
Figure A.15 – Corporate security zone template architecture . 112
Figure A.16 – Security zones for an example IACS . 113
Figure A.17 – Security level lifecycle model: Develop and implement phase . 116
Figure A.18 – Security level lifecycle model: Maintain phase . 120
Figure A.19 – Graphical view of category: Monitoring and improving the CSMS . 133
Figure B.1 – Top level activities for establishing a CSMS . 140
Figure B.2 – Activities and dependencies for activity: Initiate CSMS program . 142
Figure B.3 – Activities and dependencies for activity: High-level risk assessment . 143
Figure B.4 – Activities and dependencies for activity: Detailed risk assessment . 144
Figure B.5 – Activities and dependencies for activity: Establish security policy,
organization and awareness . 144
Figure B.6 – Training and assignment of organization responsibilities . 145
Figure B.7 – Activities and dependencies for activity: Select and implement
countermeasures . 146
Figure B.8 – Activities and dependencies for activity: Maintain the CSMS . 147

Table 1 – Business rationale: Requirements . 18
Table 2 – Risk identification, classification and assessment: Requirements . 19
Table 3 – CSMS scope: Requirements . 21
Table 4 – Organizing for security: Requirements . 22
Table 5 – Staff training and security awareness: Requirements . 22
Table 6 – Business continuity plan: Requirements . 23
Table 7 – Security policies and procedures: Requirements . 24
Table 8 – Personnel security: Requirements . 26
Table 9 – Physical and environmental security: Requirements . 27
Table 10 – Network segmentation: Requirements . 28
Table 11 – Access control –
...