自动化学报2019，Vol.45Issue(1)：98-109,12.DOI:10.16383/j.aas.2018.c180336
基于贝叶斯序贯博弈模型的智能电网信息物理安全分析
Cyber-physical Security Analysis of Smart Grids With Bayesian Sequential Game Models
摘要
Abstract
A smart grid is a network which uses communication and information technologies to optimize the transmission and distribution of power from suppliers to consumers. As a kind of cyber-physical system (CPS) , a smart grid consists of the network part of data computing and communication and the physical part of all devices. Many security issues arise in both components of the grid, such as injecting bad data, collecting customer privacy information (cyber attacks) and attacking the grid physical devices (physical attacks) . In this paper, we study how the system administrator (defender) can determine the type of attack and make optimal protection strategy. We propose a Bayesian sequential game model to defermine the type of attack, and analyze the equilibrium strategy of both game sides according to the sequential game tree. Firstly, we construct a static Bayesian game model between the attacker of an indeterminate type and the defender.We transform the incomplete information game into a complete information game through Harsanyi transformation, and analyze the Bayesian Nash equilibrium to determine the type of attacker. Secondly, we consider the sequential game model between attackers and defenders, which can effectively help defender to make decision in dynamic networks. Through the backward induction, the game tree is analyzed between two types of attackers and defenders, respectively. Then we obtain the equilibrium path of the game tree and make the optimal strategies for both players. It is shown that the defender can determine the type of attacker and make the optimal strategy by the Bayesian sequential game model, which provides a reference for the security research on smart grids.关键词
信息物理系统/智能电网安全/网络攻击/物理攻击/贝叶斯序贯博弈Key words
Cyber-physical system (CPS)/smart grid security/cyber attack/physical attack/Bayesian sequential game引用本文复制引用
李军,李韬..基于贝叶斯序贯博弈模型的智能电网信息物理安全分析[J].自动化学报,2019,45(1):98-109,12.基金项目
国家自然科学基金(61522310)资助 （61522310）
