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ISA/IEC 62443 Standards - Part 3
Standards Overview Series, covering key topics on what you need to know [Securing Things by M. Yousuf Faisal]
M. Yousuf Faisal
February 08, 2025
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Hello Securing Things Community,
This is Part-3 of a multi-part series on ISA/IEC 62443 standards overview - and will be expanding more on the standards, understand what are zones and conduits, foundational requirements, its relationship with systems and other requirements, applicability of security levels, different parts of the standard across the cybersecurity lifecycle phases, reference architecture and more.
introduction & background about the standards series,
key stakeholders, IACS roles & responsibilities,
4 groups of standards requirements,
3 phase IACS Cybersecurity Lifecycle,
ISA Secure Certifications for Suppliers, Products, Asset owners & individuals,
important terms, definitions & relationships,
Standards series introduction (of each standard part),
Standards elements, security levels, & types of standards requirements.
Quick test: Try to recall the 4 groups in the standards series using the tip from Part 1. If you can't, click the Part 1 link for a reminder. Hope this helps!But before we begin, do me a favour and make sure you hit the “Subscribe” button to let me know that you care or liked and keep me motivated to publish more. Thanks!
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✅Note: Part 2 included a diagram illustrating the relationship of certain key terms and definitions. There are plans for certain terminology to be updated soon. More on this when new terms get published in future.
➡The 62443 series includes numerous related standards and reports. Clause three of each publication is the source for terms, conventions, and abbreviations.
Security Requirements📜
We’ll start where we left off in Part 2 related to different types of requirements.
IEC62443-3-3 outlines seven foundational requirements (FRs), which are detailed into a series of system requirements (SRs) and requirement enhancements (REs). The standard provides a chart to map SRs and REs to SLs 1 to 4.
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