Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Moving Target Defense for Securing Cyber-Physical Systems   This article considers the design and analysis of multiple moving target
defenses for recognizing and isolating attacks on cyber-physical systems. We
consider attackers who perform integrity attacks on a set of sensors and
actuators in a control system. In such cases, a model aware adversary can
carefully design attack vectors to bypass bad data detection and identification
filters while causing damage to the control system. To counter such an
attacker, we propose the moving target defense which introduces stochastic,
time-varying parameters in the control system. The underlying random dynamics
of the system limit an attacker's model knowledge and inhibits his/her ability
to construct stealthy attack sequences. Moreover, the time-varying nature of
the dynamics thwarts adaptive adversaries. We explore three main designs.
First, we consider a hybrid system where parameters within the existing plant
are switched among multiple modes. We demonstrate how such an approach can
enable both the detection and identification of malicious nodes. Next, we
investigate the addition of an extended system with dynamics that are coupled
to the original plant but do not affect system performance. An attack on the
original system will affect the authenticating subsystem and in turn be
revealed by a set of sensors measuring the extended plant. Lastly, we propose
the use of sensor nonlinearities to enhance the effectiveness of the moving
target defense. The nonlinear dynamics act to conceal normal operational
behavior from an attacker who has tampered with the system state, further
hindering an attacker's ability to glean information about the time-varying
dynamics. In all cases mechanisms for analysis and design are proposed.
Finally, we analyze attack detectability for each moving target defense by
investigating expected lower bounds on the detection statistic. Our
contributions are tested via simulation.

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The categories of this paper are: eess
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: stat
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin