Why is inter-system communication a significant concern in IACS cybersecurity?

Inter-system communication is a significant concern in IACS (Industrial Automation and Control Systems) cybersecurity primarily because it can introduce vulnerabilities if not properly secured. As systems communicate with one another, they create potential attack vectors that can be exploited by malicious actors. Each point of communication represents an opportunity for unauthorized access or data manipulation if adequate security measures, such as encryption, authentication, and real-time monitoring, are not implemented. This is particularly critical in industrial environments where the integrity and availability of control systems can directly impact safety and operational efficiency.

While there may be implications such as slower data processing, limited user access, and increased costs associated with managing network security, these factors are not primary concerns related to cybersecurity risks stemming from inter-system communication. The focus should remain on understanding and mitigating the vulnerabilities introduced through these communications to ensure the overall integrity and resilience of IACS environments.