The term "digital twin" (DT) has become a key theme of the cyber-physical systems (CPSs) area, while remaining vaguely defined as a virtual replica of an entity. This article identifies DT characteristics essential for enhancing CPS security and discusses indicators to evaluate them.

翻译：“数字孪生”（digital twin, DT）已成为信息物理系统（cyber-physical systems, CPSs）领域的关键主题，但其定义仍模糊地被视为实体的虚拟副本。本文识别了增强CPS安全所必需的DT特性，并讨论了评估这些特性的指标。