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”（DT）一词已成为信息物理系统（CPS）领域的关键主题，但其作为实体虚拟副本的定义仍较为模糊。本文识别了增强CPS安全性所必需的数字孪生特征，并讨论了评估这些特征的指标。