ISA/IEC 62443 Recommendations for Secure Access

This guide focuses on the ISA/IEC 62443 standards, which provide a systematic approach to enhancing cybersecurity measures for Industrial Automation Control Systems (IACS) and operational technology (OT) networks. The document outlines the importance of these standards in securing on-site and off-site access to production sites, digital assets, and industrial control systems. It details the structure of the ISA/IEC 62443 series, which is divided into four groups addressing foundational concepts, security policies, system requirements, and component requirements. The guide emphasizes the necessity of access management in IACS design, highlighting its role in security, compliance, risk management, operational efficiency, and protection of intellectual property. Additionally, it discusses the defense-in-depth approach and the zone and conduit model, which are essential for safeguarding OT environments. The document also underscores the significance of continuous monitoring and compliance with these standards to maintain resilience against emerging threats.