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Deriving invariant checkers for critical infrastructure using axiomatic design principles

Cybersecurity 2021年第1期4卷 67-90页

作者： Cheah Huei Yoong Venkata Reddy Palleti Rajib Ranjan maiti Arlindo Silva christopher m poskitt Singapore University of Technology and Design 8 Somapah Road487372 SingaporeSingapore Indian Institute of Petroleum and Energy 2nd FloorAU Engg College Main BlockAndhra University530003 VisakhapatnamIndia Birla Institute of Technology and Science PilaniHyderabad Campus Jawahar NagarKapra Mandal Medchal District500078 TelanganaIndia Singapore management University 80 Stamford Road178902 SingaporeSingapore

Cyber-physical systems(CPSs)in critical infrastructure face serious threats of attack,motivating research into a wide variety of defence mechanisms such as those that monitor for violations of invariants,*** properties over sensor and actuator states that should always be *** approaches for identifying invariants attempt to do so automatically,typically using data logs,but these can miss valid system properties if relevant behaviours are not well-represented in the ***,as the CPS is already built,resolving any design flaws or weak points identified through this process is *** this paper,we propose a systematic method for deriving invariants from an analysis of a CPS design,based on principles of the axiomatic design methodology from design *** method iteratively decomposes a high-level CPS design to identify sets of dependent design parameters(*** and actuators),allowing for invariants and invariant checkers to be derived in parallel to the implementation of the *** apply our method to the designs of two CPS testbeds,SWaT and WADI,deriving a suite of invariant checkers that are able to detect a variety of single-and multi-stage attacks without any false ***,we reflect on the strengths and weaknesses of our approach,how it can be complemented by other defence mechanisms,and how it could help engineers to identify and resolve weak points in a design before the controllers of a CPS are implemented.

关键词： Cyber-physical systems Critical infrastructure Industrial control systems Systematic design framework Axiomatic design Invariants Anomaly detection Supervised machine learning

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