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IEC TS 63208
Edition 1.0 2020-03
TECHNICAL
SPECIFICATION
colour
inside
Low-voltage switchgear and controlgear – Security aspects
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IEC TS 63208
Edition 1.0 2020-03
TECHNICAL
SPECIFICATION
colour
inside
Low-voltage switchgear and controlgear – Security aspects
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.130.20 ISBN 978-2-8322-8021-8
– 2 – IEC TS 63208:2020 © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 12
4 General . 13
5 Security objectives . 13
6 Security lifecycle management . 13
6.1 General . 13
6.2 Security risk assessment . 14
6.3 Response to security risk . 15
6.4 Security requirement specification . 16
6.5 Important data . 16
6.6 System architecture . 16
6.6.1 Control system . 16
6.6.2 Levels of communication functionalities . 16
6.6.3 Levels of connectivity . 17
6.6.4 Control system exposure levels . 19
7 Security requirements . 20
7.1 General . 20
7.2 Cybersecurity aspects . 20
7.3 Physical access and environment . 21
7.4 Equipment requirement . 22
7.4.1 General . 22
7.4.2 Hardening . 22
7.4.3 Encryption techniques . 22
7.4.4 Embedded software robustness and integrity . 22
7.4.5 Denial of service . 23
7.4.6 Authentication of users . 23
7.4.7 Communication systems . 24
7.4.8 Wireless communication . 24
8 Instructions for installation, operation and maintenance . 24
9 Development and testing . 25
9.1 General development method . 25
9.2 Testing . 25
Annex A (informative) Cybersecurity and electrical system architecture . 26
A.1 General . 26
A.2 Typical architecture involving switchgear and controlgear and their assembly . 26
A.2.1 Building . 26
A.2.2 Manufacturing . 27
A.3 Security levels and product standards . 28
Annex B (informative) Use case studies . 29
B.1 General . 29
B.2 Use case 1 – Protection against malicious firmware upgrade of a circuit-
breaker . 29
B.3 Use case 2 – Protection against unauthorized access to electrical production
network . 30
B.4 Use case 3 – Protection against DDoS (distributed denial of service) attack
through insecure IoT devices . 31
B.5 Use case 4 – Protection against unauthorized access to the electrical
network using illegitimate device . 32
B.6 Use case 5 – Protection against malicious firmware upgrade of a sensor
(e.g. proximity switch), mounted in a machine wired-connected by IO-Link
interface . 34
B.7 Use case 6 – HMI: human machine interface – Protection against
unauthorized access to a simple sensor (mounted in a machine) – improper
parametrization . 35
B.8 Use case 7 – HMI: human machine interface – Protection against
unauthorized access to a complex sensor (mounted in a machine) –
improper parametrization . 36
B.9 Use case 8 – Protection against unauthorized access to a sensor (e.g.
proximity switch), mounted in a machine, connected by wireless
communication interface (WCI) . 38
Annex C (informative) Basic cybersecurity aspects . 40
C.1 General . 40
C.2 Identification and authentication . 40
C.3 Use control . 40
C.4 System integrity . 40
C.5 Data confidentiality . 41
C.6 Restricted data flow . 41
C.7 Timely response to events . 41
C.8 Resource availability . 41
Annex D (informative) Guidelines for users of switchgear and controlgear . 42
D.1 General . 42
D.2 Risk assessment and security planning . 42
D.2.1 Risk assessment . 42
D.2.2 Security plan . 42
D.3 Recommendations for design and installation of the system integrating
switchgear and controlgear . 43
D.3.1 General access control . 43
D.3.2 Recommendations for local access . 43
D.3.3 Recommendations for remote access . 44
D.3.4 Recommendations for firmware upgrades . 44
Bibliography . 45
Figure 1 – Example of physical interfaces of an embedded device in an equipment
which can be subject to an attack . 14
Figure 2 – Control system architecture with switchgear and controlgear . 17
Figure 3 – Control system connectivity level C3 . 18
Figure 4 – Control system connectivity level C4 . 18
Figure 5 – Control system connectivity level C5 . 19
Figure 6 – Switchgear and controlgear minimum security profile . 20
Figure 7 – Example of security instruction symbol . 25
– 4 – IEC TS 63208:2020 © IEC 2020
Figure A.1 – Building electrical architecture . 27
Figure A.2 – Industrial plants . 28
Table 1 – Typical threats. 14
Table 2 – Level of exposure of a control system . 19
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
SECURITY ASPECTS
FOREWORD
1) The International Electrotechnical Commission
...