Event‐based secure leader‐following consensus for cyber‐physical systems under denial‐of‐service attacks

Abstract

This article studies secure leader-following consensus for cyber-physical systems (CPSs) under energy-limited denial-of-service (DoS) attacks. First, an event-based data update strategy is designed to reduce the communication occupancy rate of limited bandwidth. In particular, both Zeno behavior and singular triggering are excluded. Second, the irregular topological combinations caused by DoS attacks are transformed into switching topologies subject to a Markov chain. On this basis, a novel distributed resilient control strategy is proposed to ensure that agent group can achieve secure leader-following consensus. Besides, an explicit analysis of DoS frequency and duration is provided to describe attack characteristics. Finally, simulation results are given to illustrate the effectiveness of the proposed control strategy.

Finite time secure state estimation for linear cyber‐physical systems with actuator and sensor attacks

“…It is obvious that the observer exists when the conditions in Theorem 2 hold. The validity proof of observer (11) can be divided into two cases. First, we will prove that the state estimation errors are bounded when k ∈ [k 0 , k 0 + 𝜏).…”

“…The necessary conditions for the existence of the finite time observer (11) are given below and its effectiveness can be proved.…”

“…Cyber attacks can be roughly divided into denial of service (DoS) attacks 10,11 and deception attacks. 12,13 Different from DoS attacks, which prevent data transmission by maliciously consuming computing or communication resources, deception attacks degrade system performance by tampering with the transmitted data.…”

Observer‐based security control for distributed cyber‐physical systems under replay attacks

“…Some robust control strategies have been developed against DoS attacks. [10][11][12][13] The other is deception attacks that modify useful data to compromise the data integrity. Compared with DoS attacks, deception attacks are more dangerous and bring more security problems.…”

“…One is the denial‐of‐service (DoS) attacks, which jam the communication channel and prevent the exchange of significant information between subsystem links by sending a large amount of useless data. Some robust control strategies have been developed against DoS attacks 10‐13 . The other is deception attacks that modify useful data to compromise the data integrity.…”