IEC TS 62443-1-1:2009 Industrial communication networks - Network and system security

- Part 1-1: Terminology, concepts and models

IEC 62443-1-1 is titled "Terminology, Concepts, and Models" and serves as the foundational document for the entire IEC 62443 series. It provides the key terminology, conceptual models, and foundational definitions necessary to understand and apply the other parts of the IEC 62443 standards. The document is designed to create a shared understanding among stakeholders involved in securing industrial automation and control systems (IACS).