OT/IoT environments that have been modernized by the promotion of DX are used in production, inventory, warehouse management, and the safety and stable provision of living infrastructure, and are now incorporated into all business and living processes. In addition to the improvement of business continuity through stable operation that has been required of OT/IoT up to now, protection from cyber attackers has become an urgent issue through the fusion and integration with IT systems. This session will explain how to apply both of these in a balanced way.