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Defense Strategy Against Load Redistribution Attacks on Power Systems Considering Insider Threats

机译：考虑内幕威胁的电力系统负载重新分配攻击防御策略

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摘要

In recent years, cybersecurity is emerging as one of the most critical problems to the normal operation of power systems. Meanwhile, insider threats are considered as a strategic and serious challenge in the cybersecurity research and have attracted increasing attention. In this article, the detailed model of load redistribution (LR) attacks against the power systems considering the presence of insider threats is developed. The LR attack problem is formulated with a security resource allocation game model. Information leakage of the system operator's defense strategy by the insider to the external attacker is considered in the proposed game model. The optimal strategies of both the system operator and attacker in the presence of the insider are calculated to maximize their own payoffs. In so doing, the impacts of the insider in the LR attacks can be investigated with the proposed security resource allocation game model. Case studies based on the IEEE 39-bus and IEEE 118-bus test systems were conducted to validate the proposed model. The results of the case studies show that the information leakage by the insider will increase the payoff of the attacker in the LR attacks. The damage on the grid can be considerable even if the information leakage probability is small. The proposed defense strategy is able to reduce the expected operation cost of the system under the LR attacks with the information leakage due to the insider threats.
机译：近年来，网络安全被涌现为电力系统正常运行的最关键问题之一。同时，内幕威胁被视为网络安全研究中的战略和严峻挑战，并引起了越来越关注的关注。在本文中，考虑存在内幕威胁的存在，负载再分配（LR）攻击的详细模型是开发的。使用安全资源分配游戏模型配制LR攻击问题。在拟议的游戏模型中考虑了系统运营商对外部攻击者的内部攻击策略的信息泄露。系统运营商和攻击者在内幕存在的情况下的最佳策略将计算出最大化自己的收益。在这样做时，可以通过建议的安全资源分配游戏模型来调查内部人员在LR攻击中的影响。进行基于IEEE 39总线的案例研究和IEEE 118总线测试系统以验证所提出的模型。案例研究结果表明，内幕人员泄露的信息将增加攻击者在LR攻击中的回报。即使信息泄漏概率很小，网格上的损坏也可以相当大。拟议的防御策略能够在LR攻击下降低系统的预期运营成本，由于内幕威胁，信息泄漏。

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