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Cooperative differential games guidance laws for multiple attackers against an active defense target

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Chinese Journal of Aeronautics 2022年第5期35卷 374-389页

作者： Fei LIU Xiwang DONG Qingdong LI Zhang REN School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control LaboratoryBeihang UniversityBeijing 100083China Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang UniversityBeijing 100083China Key Laboratory of Dependable Service Computing in Cyber Physical Society Ministry of Education of ChinaChongqing UniversityChongqing 400044China

This paper is concerned with a scenario of multiple attackers trying to intercept a target with active defense.Three types of agents are considered in the guidance:The multiple attackers,the target and the defender,where the attackers aim to pursuit the target from different directions and evade from the defender simultaneously.The guidance engagement is formulated in the framework of a zero-sum two-person differential game between the two opposing teams,such that the measurements on the maneuver of the target or estimations on the defending strategy of the defender can be absent.Cooperation of the attackers resides in two aspects:redundant interception under the threat of the defender and the relative intercept geometry with the target.The miss distances,the relative intercept angle errors and the costs of the agents are combined into a single performance index of the game.Such formulation enables a unitary approach to the design of guidance laws for the agents.To minimize the control efforts and miss distances for the attackers,an optimization method is proposed to find the best anticipated miss distances to the defender under the constraint that the defender is endowed with a capture radius.Numerical simulations with two cases are conducted to illustrate the effectiveness of the proposed cooperative guidance law.

关键词： active defense Cooperative guidance Differential games Minimum effort optimization Relative intercept angle

ATSSC:An Attack Tolerant System in Serverless Computing

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China Communications 2024年第6期21卷 192-205页

作者： Zhang Shuai Guo Yunfei Hu Hongchao Liu Wenyan Wang Yawen Information Engineering University Zhengzhou 450002China

Serverless computing is a promising paradigm in cloud computing that greatly simplifies cloud programming.With serverless computing,developers only provide function code to serverless platform,and these functions are invoked by its driven events.Nonetheless,security threats in serverless computing such as vulnerability-based security threats have become the pain point hindering its wide adoption.The ideas in proactive defense such as redundancy,diversity and dynamic provide promising approaches to protect against cyberattacks.However,these security technologies are mostly applied to serverless platform based on“stacked”mode,as they are designed independent with serverless computing.The lack of security consideration in the initial design makes it especially challenging to achieve the all life cycle protection for serverless application with limited cost.In this paper,we present ATSSC,a proactive defense enabled attack tolerant serverless platform.ATSSC integrates the characteristic of redundancy,diversity and dynamic into serverless seamless to achieve high-level security and efficiency.Specifically,ATSSC constructs multiple diverse function replicas to process the driven events and performs cross-validation to verify the results.In order to create diverse function replicas,both software diversity and environment diversity are adopted.Furthermore,a dynamic function refresh strategy is proposed to keep the clean state of serverless functions.We implement ATSSC based on Kubernetes and Knative.Analysis and experimental results demonstrate that ATSSC can effectively protect serverless computing against cyberattacks with acceptable costs.

关键词： active defense attack tolerant cloud computing security serverless computing

Concept and Research Framework for Coordinated Situation Awareness and active defense of Cyber-physical Power Systems Against Cyber-attacks

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Journal of Modern Power Systems and Clean Energy 2021年第3期9卷 477-484页

作者： Ming Ni Manli Li Jun’e Li Yingjun Wu Qi Wang the NARI Group Corporation(State Grid Electric Power Research Institute) NARI Technology Co.Ltd.and the State Key Laboratory of Smart Grid Protection and ControlNanjing 211106China the School of Cyber Science and Engineering Wuhan Universityand the Key Laboratory of Aerospace Information Security and Trusted Computing of the Ministry of EducationWuhan 430072China the College of Energy and Electrical Engineering Hohai UniversityNanjing 211100China the School of Electrical Engineering Southeast UniversityNanjing 210096China

Due to the tight coupling between the cyber and physical sides of a cyber-physical power system(CPPS),the safe and reliable operation of CPPSs is being increasingly impacted by cyber security.This situation poses a challenge to traditional security defense systems,which considers the threat from only one side,i.e.,cyber or physical.To cope with cyberattacks,this paper reaches beyond the traditional one-side security defense systems and proposes the concept of cyber-physical coordinated situation awareness and active defense to improve the ability of CPPSs.An example of a regional frequency control system is used to show the validness and potential of this concept.Then,the research framework is presented for studying and implementing this concept.Finally,key technologies for cyber-physical coordinated situation awareness and active defense against cyber-attacks are introduced.

关键词： Cyber-physical power system(CPPS) cyber security cyber-attack situation awareness active defense

Optimal guidance against active defense ballistic missiles via differential game strategies

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Chinese Journal of Aeronautics 2020年第3期33卷 978-989页

作者： Haizhao LIANG Jianying WANG Yonghai WANG Linlin WANG Peng LIU School of Aeronautics and Astronautics Sun Yat-sen UniversityGuangzhou 510275China Beijing Institute of Space Long March Vehicle Beijing 100076China

The optimal guidance problem for an interceptor against a ballistic missile with active defense is investigated in this paper.A class of optimal guidance schemes are proposed based on linear quadratic differential game method and numerical solution of Riccati differential equation.By choosing proper parameters, the proposed guidance schemes are able to drive the interceptor to the target and away from the defender simultaneously.Additionally, fuel cost, control saturation,chattering phenomenon and parameters selection were taken into account.Satisfaction of the proposed guidance schemes of the saddle point condition is proven theoretically.Finally, nonlinear numerical examples are included to demonstrate the effectiveness and performance of the developed guidance approaches.Comparison of control performance between different guidance schemes are presented and analysis.

关键词： active defense Ballistic missile Differential game Guidance law Optimal guidance

User Station Security Protection Method Based on Random Domain Name Detection and active defense

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Journal of Information Security 2023年第1期14卷 39-51页

作者： Hongyan Yin Xiaokang Ren Jinyu Liu Shuo Zhang Wenkun Liu School of Information Engineering University of Shenyang Shenyang China Shenyang Institute of Computing Technology Chinese Academy of Sciences Shenyang China Shenyang Institute of Computing Technology Co. Ltd. CAS Chinese Academy of Sciences Shenyang China Turpan Electric Power Supply Company State Grid Xinjiang Electric Power Company Limited Turpan China

The power monitoring system is the most important production management system in the power industry. As an important part of the power monitoring system, the user station that lacks grid binding will become an important target of network attacks. In order to perceive the network attack events on the user station side in time, a method combining real-time detection and active defense of random domain names on the user station side was proposed. Capsule network (CapsNet) combined with long short-term memory network (LSTM) was used to classify the domain names extracted from the traffic data. When a random domain name is detected, it sent instructions to routers and switched to update their security policies through the remote terminal protocol (Telnet), or shut down the service interfaces of routers and switched to block network attacks. The experimental results showed that the use of CapsNet combined with LSTM classification algorithm can achieve 99.16% accuracy and 98% recall rate in random domain name detection. Through the Telnet protocol, routers and switches can be linked to make active defense without interrupting services.

关键词： User Station Random Domain Name Detection Capsule Network active defense Long Short Term Memory

An Intelligent active defense Method Against Trojan Based on Behavior Sequence

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An Intelligent Active Defense Method Against Trojan Based on...

A differential game for cooperative target defense with two slow defenders

2015年中国智能自动化学术会议

作者： Linbo Tao Jianjing Shen Peng Hu The Sixth Faculty of the PLA Information Engineering University

For the question of lacking Trojans structure analyzing and relationship research of behavior sequence combination in current plan of active defense, the paper studies principles of traditional anti-virus and active defense, then it modularizes the commonality of Trojans by analyzing their structure, generalizes breakthrough methods and proposes two analyzing tactics. With the help of the two tactics and module belonging of Trojan behavior sequence analyzing, the relevance of message sequence and typical Trojans behavior sequences are studied. At last we can effectively improve the ability of the active defense to identify Trojans through experiments.

关键词： active defense Breakthrough method Module Behavior sequence

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Science China(Information Sciences) 2020年第12期63卷 269-271页

作者： Li LIANG Fang DENG School of Automation Beijing Institute of Technology School of Information Engineering Inner Mongolia University of Science and Technology

Dear editor,active defense is an effective way to improve battlefield survivability [1]. In the actual battlefield environment, equipment with weaker survivability usually needs a friendly platform to protect it from attacks. For example, important assets need to be protected by armed defense forces in the course of transportation to prevent them from being seized and destroyed by enemy forces.

关键词： Pursuit-evasion game active defense Target-Attacker-Defender game Barrier Cooperate policy

Preventing Hardware Trojans in Switch Chip Based on Payload Decoupling

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China Communications 2021年第8期18卷 96-108页

作者： Ke Song Binghao Yan Xiangyu Li Qinrang Liu Ling OuYang Information Engineering University Zhengzhou 450002China Tsinghua University Beijing 100084China

Hardware Trojans in integrated circuit chips have the characteristics of being covert,destructive,and difficult to protect,which have seriously endangered the security of the chips themselves and the information systems to which they belong.Existing solutions generally rely on passive detection techniques.In this paper,a hardware Trojans active defense mechanism is designed for network switching chips based on the principle of encryption algorithm.By encoding the data entering the chip,the argot hidden in the data cannot trigger the hardware Trojans that may exist in the chip,so that the chip can work normally even if it is implanted with a hardware Trojans.The proposed method is proved to be effective in preventing hardware Trojans with different trigger characteristics by simulation tests and practical tests on our secure switching chip.

关键词： network switching chip active defense hardware trojan payload decoupling