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A Non-Cooperative Differential Game-Based security Model in fog Computing

China Communications 2017年第1期14卷 180-189页

作者： Zhi Li Xianwei Zhou Yanzhu Liu Haitao Xu Li Miao School of Computer and Communication Engineering University of Science and Technology Beijing (USTB) Beijing 100083 China Great Wall Computer Software and Systems Inc. Beijing 100190 China

fog computing is a new paradigm providing network services such as computing, storage between the end users and cloud. The distributed and open structure are the characteristics of fog computing, which make it vulnerable and very weak to security threats. In this article, the interaction between vulnerable nodes and malicious nodes in the fog computing is investigated as a non-cooperative differential game. The complex decision making process is reviewed and analyzed. To solve the game, a fictitious play-based algorithm is which the vulnerable node and the malicious nodes reach a feedback Nash equilibrium. We attain optimal strategy of energy consumption with Qo S guarantee for the system, which are conveniently operated and suitable for fog nodes. The system simulation identifies the propagation of malicious nodes. We also determine the effects of various parameters on the optimal strategy. The simulation results support a theoretical foundation to limit malicious nodes in fog computing, which can help fog service providers make the optimal dynamic strategies when different types of nodes dynamically change their strategies.

关键词： fog computing differential game fog security feedback nash equilibrium

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A Key Management Scheme Based on Hypergraph for fog Computing

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China Communications 2018年第11期15卷 158-170页

作者： Zhi Li Yanzhu Liu Di Liu Chunyang Li Wei Cui Guanglin Hu State Grid Information & Telecommunication Group Co. Ltd. Beijing 102211 China Great Wall Computer Software and Systems Inc. Beijing 100190 China

fog computing is a new paradigm supporting the stringent requirements of mobility applications by bridging cloud computing and smart devices. Since the smart devices may be deployed in dynamic areas where are out of strict monitoring and protection, fog computing requires security protections to ensure confidentiality and integrity. In this article, to deal with security requirements and considering the distinctive features, a key management based on hypergraph schemed is designed. Firstly, based on the key hypergraph, the three hierarchy architecture of fog computing is divided into two subnetworks. Furthermore, each key management process of both two subnetworks is designed to satisfy the operational and security requirements of fog computing. Finally, the performance evaluation and numerical simulation have been provided to validate the proposed scheme.

关键词： fog computing fog security keymanagement hypergraph

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