Secure Product Development
IEC 62443-4-1:2018 is the product-supplier part for secure development. It is about the lifecycle process used to develop, maintain, and retire products for IACS environments.
Secure development lifecycle
IEC states that IEC 62443-4-1 defines secure development lifecycle requirements for products intended for use in industrial automation and control systems. It applies to new or existing processes for developing, maintaining, and retiring hardware, software, or firmware. It applies to the developer and maintainer of the product, not to the integrator or user as those roles.
IEC describes the lifecycle as including security requirements definition and secure design. The evidence should connect product security needs to design decisions, assumptions, and intended use.
The lifecycle also includes secure implementation, coding guidance, verification, and validation. That makes 4-1 a repeatable process claim, not a one-time vulnerability scan.
IEC public material names defect management, patch management, and product end-of-life. These areas link the development lifecycle to vulnerability handling and support after release.
The practical claim is therefore process-based: the supplier can show that security activities are repeatable and applied to the product lifecycle. It is weaker to show only a corporate policy, an isolated penetration test, or a defect log with no link back to the lifecycle.
What it does not prove alone
IEC 62443-4-1 evidence is necessary in many product-supplier and certification contexts, but it does not prove every IEC 62443 claim. It does not by itself show that a component meets IEC 62443-4-2 technical requirements, that a control system meets IEC 62443-3-3, or that a deployed installation has the right zones, conduits, and target security levels.
Not the component capability
Component capability needs the relevant IEC 62443-4-2 scope, component type, interfaces, and SL-C(component) claim.
Not the system risk result
System risk depends on the system under consideration, zones, conduits, operational assumptions, and target levels.
Use with product law
IEC 62443-4-1 can support product-law evidence when the legal requirement is about secure design, development, vulnerability handling, support, or lifecycle control. It still does not replace the law. The file needs to name the law, product, intended use, security context, applicable requirement, and the way 4-1 evidence supports that requirement.
- CRA: current CEN-CENELEC work describes EN IEC 62443-4-1:2018/A11:2026 as part of CRA alignment work, but the present 2018 IEC part alone is not an OJ-cited CRA presumption-of-conformity claim.
- Machinery Regulation: 4-1 can support development-process evidence for protection against corruption, but the machinery safety requirement remains the controlling legal requirement.
- Certification: the certificate scope decides whether the claim is a process capability assessment, application of capabilities, or supporting reference for a component capability claim.