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In the realm of industrial control systems (ICS), ensuring robust security for Process Control Systems (PCS) and Emergency Control System (ECS) are paramount. These systems are critical for maintaining operational continuity and safety in various industrial sectors, including energy, manufacturing, and chemical processing. The IEC 62443 standard, specifically the Zone and Conduit Requirement (ZCR), offers a structured approach to enhance the cybersecurity posture of PCS and ECS systems. However, the increasing integration of ICS with networked systems has exposed these systems to a range of cybersecurity risks. This project focuses on a comprehensive risk assessment of ICS, specifically examining vulnerabilities and threats associated with widely used communication protocols: Modbus, Profibus, Highway Addressable Remote Transducer (HART), and Fieldbus. ICS are pivotal in maintaining operational continuity and safety in critical infrastructure. Standards like IEC 62443 focus on cybersecurity, while IEC 61508 and IEC 61511 address functional safety. Understanding the relationship between these standards, particularly in the context of Purdue levels 0 and 1, is essential for integrating safety and security in ICS environments. This paper explores this relationship, emphasizing their convergence and divergence in addressing cybersecurity and safety concerns.

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Proactive Cybersecurity Risk Assessment and Implementation in ICS Protocols for Operational Technology

  • 会议论文

  • 发表日期：

    2026年

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  • B. Marimuthu,
  • Nishanth Kumar,
  • Shinu Abhi

摘要

In the realm of industrial control systems (ICS), ensuring robust security for Process Control Systems (PCS) and Emergency Control System (ECS) are paramount. These systems are critical for maintaining operational continuity and safety in various industrial sectors, including energy, manufacturing, and chemical processing. The IEC 62443 standard, specifically the Zone and Conduit Requirement (ZCR), offers a structured approach to enhance the cybersecurity posture of PCS and ECS systems. However, the increasing integration of ICS with networked systems has exposed these systems to a range of cybersecurity risks. This project focuses on a comprehensive risk assessment of ICS, specifically examining vulnerabilities and threats associated with widely used communication protocols: Modbus, Profibus, Highway Addressable Remote Transducer (HART), and Fieldbus. ICS are pivotal in maintaining operational continuity and safety in critical infrastructure. Standards like IEC 62443 focus on cybersecurity, while IEC 61508 and IEC 61511 address functional safety. Understanding the relationship between these standards, particularly in the context of Purdue levels 0 and 1, is essential for integrating safety and security in ICS environments. This paper explores this relationship, emphasizing their convergence and divergence in addressing cybersecurity and safety concerns.