A Novel Technique for Detection of Time Delay Switch Attack on Load Frequency Control

Abstract

In this paper, we focus on the estimation of time delays caused by adversaries in the sensing loop (SL). Based on the literature review, time delay switch (TDS) attacks could make any control system, in particular a power control system, unstable. Therefore, future smart grids will have to use advanced methods to provide better situational awareness of power grid states keeping smart grids reliable and safe from TDS attacks. Here, we introduce a simple method for preventing time delay switch attack on networked control systems. The method relies on an estimator that will estimate and track time delays introduced by an adversary. Knowing the maximum tolerable time delay of the plant's optimal controller for which the plant remains stable, a time-delay detector issues an alarm signal when the estimated time delay is larger than the minimum one and directs the system to alarm state. In an alarm state, the plant operates under the control of an emergency controller that is local to the plant and remains in this mode until the networked control system state is restored. This method is an inexpensive and simple way to guarantee that an industrial control system remains stable and secure.

Secure and Privacy-Aware Blockchain Design: Requirements, Challenges and Solutions

“…Passive attack Time delay attack [83] DDoS attack [6] Traffic analysis attack [89] Eavesdropping attack [91] Majority attack [98] MITM attack [81] Malleability attack [93] Selfish mining attack [99] Background knowledge attack [68] Skewness attack [116] Homogeneity attack [115] Similarity attack [117] Malicious smart contract [106] BGP hijacking attack [85] Liveness attack [87] Attack layers Attacks Countermeasures…”

“…An attacker tries to control the network traffic, which leads to the delay in the transmission of message[82]. Delay attack can be categorized in the following two attacks: BGP hijacking and Liveness attack.•Countermeasures: To prevent time delay attack, Arman et al[83], proposed a method to track and estimate the time delay during communication on the network. If the measured time delay is more than the allowed time delay, then the system issue an alarm signal to stable the system.…”

Observer-Based H∞ Load Frequency Control for Networked Power Systems with Limited Communications and Probabilistic Cyber Attacks

“…In the last few years, a good deal of results have been reported with regard to LFC problems of power systems containing packet dropout as well as time delays [6,[12][13][14][15]. A novel decentralized LFC control strategy based on switching control theory was researched by Yang et al By means of transmission delays as a switching decision parameter, the LFC system as a range of subsystems was modeled, which provides a more accurate description of the impact of delays as well as packet dropout on the system [6].…”