Testing and Defending Methods Against DOS Attack in State Estimation

Abstract

In this paper, we consider a state estimation problem. In this problem, a sensor measures the state of a linear discrete‐time system and sends measurements to an estimator via a packet‐dropping communication link. We are concerned with the effect of Denial‐of‐Service (DoS) attacks on stability of the estimation system, and particularly focus on how to examine whether the communication channel is under DoS attack or not as well as how to defend accordingly, if defense is possible. We formulate the detection problem as a hypothesis testing problem provided that the statistics of the communication channel is known a priori. Two defense countermeasures are proposed: one of which uses a secured packet coding approach to partly compensate the previous packet loss; and in the other the sensor's transmission power is raised to resist the jamming effect brought by the DoS attack. Simulations are provided to demonstrate the main results.

Distributed impulsive synchronization of Lur'e dynamical networks via parameter variation methods

“…where ψ i (t) is the initial condition of error networks (6). Throughout this paper, we assume that e i (t) is right-hand continuous at t = t k , k ∈  , and e i (t k ) = e i (t + k ) = lim t→t + k e i (t), e i (t − k ) = lim t→t − k e i (t).…”

“…Suppose that Assumptions 1 and 2 are satisfied. Consider the coupled error Lur'e networks (6) and the distributed pinning controller (5). For the impulsive sequence ζ = {t 1 , t 2 , · · ·} defined in Definition 2, assume that the average impulsive interval is less than N a .…”

“…For the first research branch, scholars focus on the topology structures, the clusterings, the dynamic behaviors, and the systematism of the networks. [1][2][3][4][5][6] The performances of networks, as another main research branch in network science, show some interesting collective behaviors of the studied networks. It should be noted that the investigation on the features of networks would be the fundamental research to network science, which provides necessary preconditions for the second type of research.…”

Cross‐layer security design for encrypted CPS based on modified security signalling game

“…Recently, the open access nature and hierarchical framework of CPS lead to severe accidents as reported in various outlets [2][3][4][5][6][7]. Serious potential hazard is proved to be existed in CPS, which is easily to be compromised by denial-of-service (DoS) attack [8,9], intelligent attack [10], and integrity data attack [11]. Encryption CPS is then proposed to deal with this problem.…”

Nonlinear sequential fusion estimation for clustered sensor networks

“…Multi-sensor fusion estimation is the organic fusion of data from multiple sensors to obtain more accurate and comprehensive state information or more accurate estimates than a single sensor. With the rapid development of computer science and information technology, the performance of the sensor has been greatly improved, this made multi-sensor fusion estimation being widely used in target tracking, signal processing, GPS positioning, fault detection, traffic control and many other fields [1][2][3][4][5][6]. In recent years, although the introduction of wireless networked multi-sensor system has brought some advantages, such as wide coverage, low cost and good robustness, it also brings a series of new issues, such as energy constrained, bandwidth constrained, signal acquisition and asynchronous transmission.…”