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A Nash equilibrium-based moving target defense against stealthy sensor attacks
Date
2020-12-14
Author
Umsonst, David
Sarıtaş, Serkan
Sandberg, Henrik
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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© 2020 IEEE.This paper investigates a moving target defense strategy based on detector threshold switching against stealthy sensor attacks. We model the interactions between the attacker and the defender as a game. While the attacker wants to remain stealthy and maximize its impact, the defender wants to minimize both the cost for investigating false alarms and the attack impact. We define the moving target defense as a mixed strategy Nash equilibrium and are able to formulate an equivalent finite matrix game of the original game. We provide a necessary and sufficient condition for the existence of a moving target defense strategy. A globally optimal moving target defense strategy is obtained via a linear optimization problem by exploiting the structure of the matrix game. Simulations with a four tank system verify that by applying an optimal moving target defense strategy, the defender reduces its cost compared to the optimally chosen fixed detector threshold.
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85099879819&origin=inward
https://hdl.handle.net/11511/94374
DOI
https://doi.org/10.1109/cdc42340.2020.9304197
Conference Name
59th IEEE Conference on Decision and Control, CDC 2020
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar
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D. Umsonst, S. Sarıtaş, and H. Sandberg, “A Nash equilibrium-based moving target defense against stealthy sensor attacks,” Virtual, Jeju Island, Güney Kore, 2020, vol. 2020-December, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85099879819&origin=inward.