On Achieving Cyber Resilience in Digitalized Rail Transit Control Systems

Unlike the ICT sector, rail transit has traditionally been viewed as an old-fashioned industry with slower technological advancements. However, the digitalization of rail transit has become essential to achieve significant benefits, such as reducing system complexity and operational costs, while enhancing safety and efficiency. During this ongoing transformation, security remains a top priority, as even a minor breach can lead to severe safety incidents. To thoroughly understand and systematically address this concern, this paper proposes a cyber resilience paradigm tailored to the unique characteristics, security risks, and requirements of rail transit systems. Drawing from an in-depth analysis of relevant contributions in the ICT domain, we redefine and specify the cyber resilience paradigm for rail transit, focusing on theoretical foundations, key techniques, standards, and implementations.