IEC PAS 63325:2020

Lifecycle requirements for functional safety and security for IACS

IEC PAS 63325:2020 provides requirements and guidance on the ensurance and assurance of functional safety and security in different stages of the lifecycle. It will help to coordinate risk assessment, design and management and operation processes, avoiding conflicts between functional safety and security.
This PAS does not aim to give some completely new lifecycle, but based on the functional safety lifecycle, security lifecycle and other state of the art engineering processes, it aims to provide requirements and suggestions in some typical stages to achieve coordination between functional safety and security.
The objective of this PAS is Industry Automation Control System (IACS), including Equipment Under Control (EUC) system and safety-related system.

General Information

• Status: Published
• Publication Date: 07-Dec-2020
• ICS: 25.040 - Industrial automation systems
• Technical Committee: TC 65 - Industrial-process measurement, control and automation
• Current Stage: PPUB - Publication issued
• Start Date: 28-Dec-2020
• Completion Date: 08-Dec-2020

Standards Content (Sample)

IEC PAS 63325 ®
Edition 1.0 2020-12
PUBLICLY AVAILABLE
SPECIFICATION
colour
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Lifecycle requirements for functional safety and security for IACS
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IEC PAS 63325 ®
Edition 1.0 2020-12
PUBLICLY AVAILABLE
SPECIFICATION
colour
inside
Lifecycle requirements for functional safety and security for IACS

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040 ISBN 978-2-8322-8861-0

– 2 – IEC PAS 63325:2020  IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative References . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 8
4 Lifecycle stages . 8
5 Management coordination requirement . 8
5.1 General . 8
5.2 Organization requirements . 8
5.3 Management of change . 9
6 Lifecycle requirements . 9
6.1 Concept and scope . 9
6.2 Risk assessment . 10
6.2.1 General requirement . 10
6.2.2 Hazard and Risk Analysis / Threat-vulnerability assessment . 11
6.2.3 Risk criterion . 11
6.2.4 Conflict resolution . 12
6.3 Development and implementation . 12
6.3.1 General . 12
6.3.2 Response to system failures or security events . 12
6.4 Operation and maintenance . 13
6.5 Decommission . 13
Annex A (informative) Measures that could be used in the coordination of safety and
security in different stages . 14
A.1 Risk assessment . 14
A.2 Development and implementation . 14
A.2.1 Physical compensation measures are necessary for access control . 14
A.2.2 Segmentation into zones and perimeter protection . 14
A.2.3 Safety and security communication protocol . 14
A.2.4 Remote access control . 15
A.2.5 Wireless access control . 15
A.2.6 Device level . 15
A.2.7 Control level . 15
A.2.8 Integration of information security protection measures . 16
A.2.9 Integration of safety and security monitoring . 16
A.2.10 Monitoring of normal operation . 16
A.2.11 Routine maintenance and inspection . 17
A.2.12 Modification . 17

Figure 1 – General process of risk assessment . 11

Table 1 – Example of classification of all the systems and devices . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIFECYCLE REQUIREMENTS FOR FUNCTIONAL
SAFETY AND SECURITY FOR IACS
FOREWORD
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A PAS is an intermediate specification made available to the public and needing a lower level of
consensus than an International Standard to be approved by vote (simple majority).
IEC PAS 63325 has been processed by IEC technical committee 65: Industrial-process
measurement, control and automation.
The text of this PAS is based on the This PAS was approved for publication
following document: by the P-members of the committee
concerned as indicated in the following
document
Draft PAS Report on voting
65/813/DPAS 65/826/RVDPAS
Following publication of this PAS, which is a pre-standard publication, the technical committee
or subcommittee concerned may transform it into an International Standard.

– 4 – IEC PAS 63325:2020  IEC 2020
This PAS shall remain valid for an initial maximum period of 2 years starting from the publication
date. The validity may be extended for a single period up to a maximum of 2 years, at the end of
which it shall be published as another type of normative document, or shall be withdrawn.

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INTRODUCTION
Safety and security are becoming increasingly interdependent. Traditional safety-related
systems are not isolated any more, as required by connectivity and inter-operability, and threats
and vulnerabilities can increase the probability of attacks to safety-related systems.
IEC TR 63069 gives some top-level framework recommendations for functional safety and
security.
This specification concentrates on how to consider the lifecycles for functional safety and
security in different stages, optimizing risk assessment, improving efficiency of safety and
security related activities included in engineering processes, avoiding conflicts between safety
functions and security countermeasures. This document also will give some safety and security
co-engineering guidelines to make the implications to systems more safe, more secure, and cost
efficient.
– 6 – IEC PAS 63325:2020  IEC 2020
LIFECYCLE REQUIREMENTS FOR FUNCTIONAL
SAFETY AND SECURITY FOR IACS
1 Scope
This PAS provides requirements and guidance for ensuring and assuring functional safety and
security in different stages of the lifecycle. It will help the coordination of risk assessment,
design and management and operation processes, avoiding conflicts between functional safety
and security.
This specification does not aim to define a completely new lifecycle, but based on the functional
safety lifecycle, security lifecycle and other state of the art engineering processes, it aims to
provide requirements and suggestions to support coordination between functional safety and
security.
The objective of this document is Industrial Automation Control Systems (IACS), including the
Equipment Under Con
...