Dynamic watermarking schemes can enhance the cyber attack detection capability of networked control systems (NCSs). This paper presents a linear event-triggered solution to conventional dynamic watermarking (CDW) schemes. Firstly, the limitations of CDW schemes for event-triggered state estimation based NCSs are investigated. Secondly, a new event-triggered dynamic watermarking (ETDW) scheme is designed by treating watermarking as symmetric key encryption, based on the limit convergence theorem in probability. Its security property against the generalized replay attacks (GRAs) is also discussed in the form of bounded asymptotic attack power. Thirdly, finite sample ETDW tests are designed with matrix concentration inequalities. Finally, experimental results of a networked inverted pendulum system demonstrate the validity of our proposed scheme.
翻译：动态水标记办法可以加强网络控制系统的网络攻击探测能力。本文件介绍了常规动态水标记办法的线性事件触发解决办法。首先,调查了以事件触发状态估计以国家水标记为基础的水标记办法的局限性。其次,设计了一个新的事件触发动态水标记办法,将水标记作为对称关键加密处理,其依据是概率的趋同理论,其针对普遍重复攻击的安全属性也以捆绑的静态攻击能力的形式加以讨论。第三,有限样本的ETDW试验是设计在矩阵浓度不平等的情况下进行的。最后,一个网络反转的笔式系统的实验结果证明了我们提议的方案的有效性。
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