How does IEC 62443-3-3 describe system security?
IEC 62443-3-3 provides guidance on the implementation of a cybersecurity management system for industrial automation and control systems (IACS). The standard describes the requirements for establishing a secure IACS environment by providing guidelines for the following security aspects:
- Network segmentation: IEC 62443-3-3 emphasizes the importance of network segmentation to limit the spread of cyber attacks within the IACS environment. The standard provides guidance on identifying security zones and conduits and the requirements for data flow control between these zones.
- Access control: The standard provides guidance on access control mechanisms to prevent unauthorized access to the IACS environment. It includes guidance on the use of authentication, authorization, and accounting mechanisms, as well as the requirements for remote access.
- Security monitoring: IEC 62443-3-3 emphasizes the importance of monitoring the IACS environment for cybersecurity threats. The standard provides guidance on the requirements for event logging, monitoring, and incident response.
- System hardening: The standard provides guidance on the requirements for system hardening, including the use of secure configuration settings and the removal of unnecessary services and applications.
- Security testing: IEC 62443-3-3 provides guidance on the requirements for security testing, including vulnerability assessments, penetration testing, and fuzz testing.
- Security management: The standard provides guidance on the requirements for cybersecurity management, including risk management, security policies and procedures, and security awareness and training.
By following the guidance in IEC 62443-3-3, organizations can establish a comprehensive cybersecurity management system that addresses the unique security challenges of industrial automation and control systems.
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