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Metrics to enhance the resilience of cyber-physical systems

Abstract : We focus on resilience towards covert attacks on Cyber-Physical Systems (CPS). We define the new k-steerability and l -monitorability control-theoretic concepts. k-steerability reflects the ability to act on every individual plant state variable with at least k different groups of functionally diverse input signals. l -monitorability indicates the ability to monitor every individual plant state variable with £ different groups of functionally diverse output signals. A CPS with k-steerability and l -monitorability is said to be (k, l)-resilient. k and l , when both greater than one, provide the capability to mitigate the impact of covert attacks when some signals, but not all, are compromised. We analyze the influence of k and l on the resilience of a system and the ability to recover its state when attacks are perpetrated. We argue that the values of k and l can be augmented by combining redundancy and diversity in hardware and software techniques that apply the moving target paradigm.
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https://hal.archives-ouvertes.fr/hal-03125741
Contributor : Joaquin Garcia-Alfaro Connect in order to contact the contributor
Submitted on : Friday, January 29, 2021 - 4:42:48 PM
Last modification on : Tuesday, October 18, 2022 - 8:34:05 AM

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Michel Barbeau, Frederic Cuppens, Nora Cuppens, Dagnas, Romain, Joaquin Garcia‐alfaro. Metrics to enhance the resilience of cyber-physical systems. TRUSTCOM 2020: 19th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, Dec 2020, Guangzhou (online), China. pp.1167-1172, ⟨10.1109/TrustCom50675.2020.00156⟩. ⟨hal-03125741⟩

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