Modern architectures are linking IT and operational technology (OT) networks ever more closely, and critical OT infrastructures are increasingly becoming a prime target for cyberattacks. Modernized industrial systems are a vulnerable mix of existing, locally acting solutions combined with new Internet-enabled technology integrations. This shift from closed to open systems, as well as the increased level of interconnectedness of industrial systems, is generating new security risks.

In addition, numerous groups of people, such as external vendors, suppliers, employees and other service providers often have remote access paths to OT systems, for example to perform maintenance work. Remot ...