IEC 62443 is a family of international standards specifically designed for the cybersecurity of industrial automation and control systems (IACS). It defines how these environments should be protected through measures such as network segmentation, access control, risk management, and the security of industrial components.
One of its key features is that it addresses security at different levels (organizational, system, and product) and allocates responsibilities among industrial operators, integrators, suppliers, and manufacturers. As a result, it is one of the primary references for designing, developing, and maintaining secure OT environments.