Malicious data deception attacks against power systems: A new case and its detection method

Abstract

Power systems usually employ bad data detection (BDD) to avoid faulty measurements caused by their anomalies, and hence can ensure the security of the state estimation of power systems. However, recently BDD has been found vulnerable to malicious data deception attacks submerged in big data. Such attacks can purposely craft sparse measurement values (i.e. attack vectors) to mislead power estimates, while not posing any anomalies to the BDD. Some related work has been proposed to emphasize this attack. In this paper, a new malicious data deception attack by considering a practical attacking situation is investigated, where the attacker has limited resources for corrupting measurements. In this case, attackers generate attack vectors with less sparsity to evade conventional BDD, while using a convex optimization method to balance the sparsity and magnitude of attack vectors. Accordingly, the effects of such an attack on operational costs and the risks of power systems are analysed in detail. Moreover, according to security evaluation for individual measurements, such attacks can be detected with high probability by just securing one critical measurement. Numerical simulations illustrate the effectiveness of the proposed new attack case and its detection method.

Real-Time H∞ Control of Networked Inverted Pendulum Visual Servo Systems

“…Communication: As shown in the left-hand side of Fig. 1, when information are transmitted through the network, network-induced delay occurs in the transmission over the network due to limited communication bandwidth and unbalanced network load [42]- [44]. We denote network-induced delay from the visual sensor to the controller and the networkinduced delay from the controller to the actuator by τ sc k and τ ca k , respectively.…”

Design of a system solution that modernizes legacy supervisory control and data acquisition systems as an early detection system

“…The error check field allows the master to confirm that the message contents are valid. 9 The client can connect to the Modbus gateway device and request any query from RTUs over the Modbus protocol. The system uses a thread mechanism to accept the request and to add it to the queue and to respond to these queries efficiently.…”

Anomaly detection and resilient control of networked control system with multi-hop routing

“…The injection data is sent by an attacker, the purpose of which © 2019 Informa UK Limited, trading as Taylor & Francis Group is to destroy the normal operation of the control system and achieve an illegal purpose (Zhonghua, Fangyuan, Yuguo, & Dehui, 2015). Because the data injection actions are deliberately produced by illegal attackers, the injection data does not present a certain statistical pattern (Chen, Li, Zhong, & Fei, 2018;Du et al, 2018). We can not consider these data as noise information either.…”