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- W2524056220 abstract "Cyber intrusions to substations are critical issues to a power grid, which must be defended and mitigated. Essentially, to better understand a cyber intrusion, reconnaissance activities should be modeled. Then, strategies of cyber attacker and defender can be studied, which help to identify substations vulnerable to cyber-attacks. In this paper, a successful intrusion is regarded as a probabilistic event related to reconnaissance activities. Its probability can be approximated by the Poisson distribution of the number of vulnerabilities discovered by the attacker. Furthermore, models of intrusion and defense in competition for control of the substations are proposed using Markov decision process (MDP). Key characteristics of target substation, attacker and defender are considered for determining probabilistic state transitions related to intrusion and defense actions. Thus, by solving the MDP models, the optimal strategies (action policies) of both the attacker and defender can be obtained. With these optimal strategies, the cyber security status of a substation can be evaluated within varied time frames. The case study validates the proposed models and method, including time-based strategies of the attacker and defender." @default.
- W2524056220 created "2016-10-07" @default.
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- W2524056220 date "2018-07-01" @default.
- W2524056220 modified "2023-10-12" @default.
- W2524056220 title "Modeling of Intrusion and Defense for Assessment of Cyber Security at Power Substations" @default.
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- W2524056220 doi "https://doi.org/10.1109/tsg.2016.2614603" @default.
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