A Key-Agreement Scheme for Cyber–Physical Systems
针对传统密码学方法在信息物理系统中可能不适用的问题，提出一种基于控制理论的方法，利用系统模型知识的不对称性，通过同时输入和状态估计算法，使网络控制器与智能执行器协商出共同密钥。
Traditional cryptographic approaches may not always be suitable for cyber–physical systems (CPSs). In this correspondence, we present a control-theoretic approach allowing a networked controller and a smart actuator of a stochastic CPS to agree on a common secret key without resorting to classical cryptographic approaches. More precisely, by utilizing the asymmetry in the system model knowledge available to the control system defender and to the eavesdropper, we propose a key-agreement scheme utilizing a simultaneous input and state estimation algorithm. The validity of the proposed solution is shown through a numerical example.