Scenario-Based Attack Route on Industrial Control System

In the past, control system networks were isolated from public external networks, so there was no way to access the control system networks from external networks. Security issues of control system networks were originated and guaranteed by itself. It can be a security by obscurity. Recently, most of devices in the control systems are changing with communication capability, and the interoperability between devices is very significant. Thus, effective management system for control system networks have been required and this have triggered connection between the control system network and external system networks. These changes make control system management easier than before, but the threat of cyberattacks from external networks are also increasing. To prevent a variety of security attacks, many security standards and solutions are applied to control systems. In this paper, we present scenario-based attack and propose a countermeasure using security control of field devices in order to improve security in control system networks.