IEC 62443 is a widely used international standard series for cybersecurity of industrial automation and control systems (IACS)—often called operational technology (OT) security. It defines how to manage cybersecurity across people, processes, and technology, covering asset owners (operators), service providers/integrators, and product suppliers.
What Is IEC 62443?
IEC 62443 provides a structured framework to reduce cyber risk in connected industrial systems by defining:
– Security requirements for systems and components
– Requirements for security programs and procedures (operations)
– Requirements for secure product development (supplier lifecycle)
– A common language for designing and assessing OT security in a consistent way
Why IEC 62443 Matters for EV Charging
Modern EV chargers are connected devices that rely on backend connectivity and remote operations:
– OCPP communication, remote control, and configuration
– OTA firmware updates and device lifecycle management
– Payments, authorization, and user data flows
– Large-scale deployments where a single vulnerability can impact many sites
IEC 62443 is often used as a benchmark to strengthen charger and backend cybersecurity, reduce operational risk, and support procurement requirements in critical or regulated environments.
IEC 62443 Structure
The series is commonly grouped into four main categories:
– 62443-1-x (General): concepts, terminology, models
– 62443-2-x (Policies & procedures): security program requirements for asset owners and service providers
– 62443-3-x (System): system security requirements and security levels; risk assessment and system design
– 62443-4-x (Components): secure product development and technical requirements for components
Security Levels and Threat Strength
IEC 62443 uses Security Levels (SL) to align protections with attacker capability:
– SL1 – protection against accidental or unintentional misuse
– SL2 – protection against intentional misuse using simple means and low resources
– SL3 – protection against sophisticated attacks with moderate resources and OT knowledge
– SL4 – protection against advanced threats with high resources and motivation
Zones and Conduits
A core IEC 62443 design concept is segmenting architectures into:
– Zones: groups of assets with similar security requirements
– Conduits: controlled communication paths between zones with defined security controls
This supports defense-in-depth and reduces blast radius if one segment is compromised.
Key Parts Often Referenced in Product and System Security
Commonly referenced parts include:
– IEC 62443-2-1 – security program requirements for IACS asset owners
– IEC 62443-2-4 – requirements for IACS service providers (integrators)
– 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
What It Typically Means in Practice
Applying IEC 62443 concepts usually involves:
– Clear device identity, authentication, and role-based access
– Secure communications (e.g., TLS), certificate and key management
– Hardening, patching, vulnerability handling, and secure update processes
– Logging, monitoring, and incident response procedures
– Network segmentation aligned with zones and conduits
Related Glossary Terms
Charger Cybersecurity
Hardware Root of Trust
Secure Boot
Secure Update Pipeline
OTA Firmware Updates
Certificate Management
OCPP
Firewall Segmentation
Intrusion Detection
Encrypted Communications