What is the IEC standard for OT cybersecurity?
What Is the IEC Standard for OT Cybersecurity?
IEC Standard for OT Cybersecurity
IEC 62443 is the leading worldwide standards series for OT cybersecurity and industrial cybersecurity, created together by IEC and ISA. It fulfills cybersecurity requirements for Industrial Automation and Control Systems (IACS) throughout lifetime . The series is applicable to PLC, DCS, SCADA, SIS, HMI, industrial network and field automation environments.
What IEC 62443 Covers
IEC 62443 is not a checklist. Organizational processes. System design. Component protection. It is a family of standards. The framework sets requirements for asset owners, service providers, system integrators and product suppliers.
Key areas include:
- IEC 62443-2-1: Security program requirements for IACS asset owners.
- IEC 62443-2-4: Security program requirements for IACS service providers.
- IEC 62443-3-3: System security requirements and security levels.
- IEC 62443-4-1: Secure product development lifecycle requirements.
- IEC 62443-4-2: Technical security requirements for IACS components.
Practical OT Application
IEC 62443 provides guidance on cybersecurity activities from design thru operation for an EPC or commissioning team. Engineers are able to identify assets, determine zones and channels, conduct risk assessments, determine target security levels and design controls.
For example, the control network of a DCS should not be connected to a plant or corporate network. Depending on system risk, consider segmentation, regulated communication pathways, authentication, secure remote access, patch management, backup, monitoring and incident response.
IEC 62443 is more than just firewalls and antivirus; it is an organized approach to industrial cybersecurity. It’s frequently used as a base to secure current and legacy OT environments.