What Industrial Automation Security (IEC 62443) requires
Operationalizing a comprehensive Industrial Automation and Control Systems (IACS) security program, in accordance with IEC 62443-2-1, demands adherence to a stringent set of technical and procedural controls that align closely with guidance in NIST Special Publication 800-82 Revision 3. A foundational element is the security risk assessment for system design, detailed in IEC 62443-3-2, which requires that high-level risk assessments possess a maximum age of 12 months and mandates strict enforcement of network partitioning into Zones and Conduits. System security requirements defined by IEC 62443-3-3 necessitate that all components achieve a minimum Target Security Level (SL-T) of 2. To secure access, multi-factor authentication is mandatory for all remote access, with account lockout triggered after a maximum of 3 consecutive failed login attempts and interactive sessions terminating after 15 minutes of inactivity; moreover, the principle of least privilege must be implemented through enforced role-based access control. The technical security requirements for IACS components, drawn from IEC 62443-4-2, stipulate that cryptographic encryption is required for all data in transit, and continuous visibility is supported through enabled automated asset discovery plus centralized security information and event monitoring (SIEM). Supporting the secure product development lifecycle requirements of IEC 62443-4-1, a 30-day service level agreement for patching critical vulnerabilities is enforced, while system resilience is bolstered by an IACS backup retention period of no less than 90 days.
Pillar: Industrial IoT & Energy · Authority: ISO (International Organization for Standardization) · Version: 1.1.0 · Last updated:
Primary source: https://www.iec.ch/standards/62443
SHA-256 integrity: 60bcae2da7881731b4cba0c7c2cea93fb33e5c2cfa4fcaec98211d66af7b2a7a
Primary Citations — 6 traced to source
- IEC 62443-2-1: Security for industrial automation and control systems - Establishing an IACS security program
- IEC 62443-3-2: Security risk assessment for system design (defines partitioning into Zones and Conduits)
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