针对拒绝服务攻击的安全状态估计与检测

Security State Estimation and Detection for Denial of Service Attacks

信息计算、网络通信以及数据处理能力的快速发展引起了人类社会生活的巨大变革,然而无线网络的开放、共享性使信息物理系统容易遭到各种类型的网络攻击.作为信息物理系统中恶意攻击者使用的最常见攻击方式之一,拒绝服务(DoS)攻击受到了人们广泛关注和深入研究.因此,考虑恶意攻击者对传感器与估计器之间无线传输信道存在固有随机数据包丢失的CPS发起DoS干扰攻击,提出了一种基于最优状态估计系统和故障检测器相结合的攻击检测模型.最后,通过MATLAB进行数值仿真验证所提出的检测模型的有效性.

With the information computing,network communication,and data processing capabilities developing rapidly,human social life has a great changes.However,due to the openness and sharing of wireless network,cyber-physical system is vulnerable to all kinds types of network attacks.As one of the most common attack methods used by malicious attackers in cyberphysical system,denial of service(DoS)attacks have received widespread attention and in-depth research.In this regard,this paper considers a malicious attacker launching a DoS interference attack on the cyber-physical system with inherent random packet loss in the wireless transmission channel between the sensor and the estimator,and proposes an attack detection based on the combination of the optimal state estimation system and the fault detector.Finally,the effectiveness of the proposed detection model is verified by a numerical simulation example of MATLAB.