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information diffusion network inferring and pathway tracking

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Science China(information Sciences) 2015年第9期58卷 135-149页

作者： ZHOU DongHao HAN WenBao WANG YongJun YUAN BaoDi College of Computer National University of Defense Technology State key laboratory of Mathematical Engineering and Advanced Computing College of Computer Science and technology Fudan University

network diffusion, such as spread of ideas, rumors, contagious disease, or a new type of behaviors, is one of the fundamental processes within networks. Designing effective strategies for influence spread maximization, rumor spread minimization, or epidemic immunization has attracted considerable research attention. However, a key challenge is that many times we can only observe the trace of contagion spreading across network, but the underlying network structure is unknown and the transmission rates between node pairs are unclear to us. In this paper, given the observed information cascades, we aim to address two problems:diffusion network structure inferring and information diffusion pathways tracking. We propose a novel probabilistic model called network Inferring from Multidimensional Features of Cascades(NIMFC) which takes into account heterogeneous features, including temporal and topological features of cascades, node attributes, and information content, to infer the latent network structure and transmission rates of edges. Also, based on the inferred network structure, we may track diffusion pathways of a cascade in social networks. We use blocked coordinate descent method to learn a sparse estimation of the latent network. Our proposed model NIMFC is evaluated both on large synthetic and real-world data sets, and experimental results show that our method significantly outperforms state-of-the-art models both in terms of recovering the latent network structure and information pathway tracking.

关键词： diffusion network network inferring information pathway tracking temporal feature node attributes topological feature informatio

Improved nonlinear invariant attack

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Science China(information Sciences) 2022年第3期65卷 266-268页

作者： Haipeng TONG Xuan SHEN Chao LI Yunwen LIU College of Liberal and Sciences National University of Defense Technology College of information and Communication National University of Defense Technology

Dear editor,In Asiacrypt 2016, Todo et al. [1] proposed a nonlinear invariant attack, a new type of distinguisher that covers any number of rounds for a substitution-permutation network（SPN） cipher under weak keys. The main idea of the nonlinear invariant attack is to find a Boolean function g : F;→ F2 such that the evaluation of g（x） ⊕ g(E;（x）) is constant for any x, where Ek（x） is a block cipher. The function g is called the nonlinear invariant of Ekand the keys k that satisfy the condition are called weak keys.

关键词： Nonlinear Invariant attack 4-bit optimal S-boxes Q-equivalence FIDES Distinguishing attack

Feasibility of Double-Click attack on a Passive Detection Quantum key Distribution System

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Chinese Physics Letters 2011年第7期28卷 27-30页

作者： ZHANG Peng LI Chao Department of Mathematics and System Science Science CollegeNational University of Defense TechnologyChangsha 410073 State key laboratory of information Security Institute of SoftwareChinese Academy of SciencesBeijing 100190

An eavesdropper(Eve)can exploit all the imperfections of a practical quantum key distribution(QKD)system to obtain some information about the secret key,no matter whether these imperfections are from the physical layer or from the post-processing *** propose a possible attack on a passive detection QKD system based on the imperfection from the software *** analysis shows that Eve can obtain all the information about the key without being discovered.

关键词： layer system quantum

Preventing IP Source Address Spoofing: A Two-Level, State Machine-Based Method

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Tsinghua Science and technology 2009年第4期14卷 413-422页

作者：毕军刘冰洋吴建平沈燕 Tsinghua National laboratory for information Science and technology Network Research Center Tsinghua University China Education and Research Network (CERNET)

A signature-and-verification-based method, automatic peer-to-peer anti-spoofing （APPA）, is pro- posed to prevent IP source address spoofing. In this method, signatures are tagged into the packets at the source peer, and verified and removed at the verification peer where packets with incorrect signatures are filtered. A unique state machine, which is used to generate signatures, is associated with each ordered pair of APPA peers. As the state machine automatically transits, the signature changes accordingly. KISS ran- dom number generator is used as the signature generating algorithm, which makes the state machine very small and fast and requires very low management costs. APPA has an intra-AS （autonomous system） level and an inter-AS level. In the intra-AS level, signatures are tagged into each departing packet at the host and verified at the gateway to achieve finer-grained anti-spoofing than ingress filtering. In the inter-AS level, signatures are tagged at the source AS border router and verified at the destination AS border router to achieve prefix-level anti-spoofing, and the automatic state machine enables the peers to change signatures without negotiation which makes APPA attack-resilient compared with the spoofing prevention method. The results show that the two levels are both incentive for deployment, and they make APPA an integrated anti-spoofing solution.

关键词： source address spoofing spoofing prevention internet security

Quantum photonic network on chip

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Chinese Physics B 2018年第5期27卷 59-73页

作者： Qun-Yong Zhang Ping Xu Shi-Ning Zhu National laboratory of Solid State Microstructures and School of Physics Nanjing University Nanjing 210093 China Institute for Quantum information and State key laboratory of High Performance Computing College of Computing National University of Defense Technology Changsha 410073 China

We provide an overview of quantum photonic network on chip. We begin from the discussion of the pros and cons of several material platforms for engineering quantum photonic chips. Then we introduce and analyze the basic building blocks and functional units of quantum photonic integrated circuits. In the main part of this review, we focus on the generation and manipulation of quantum states of light on chip and are particularly interested in some applications of advanced integrated circuits with different functionalities for quantum information processing, including quantum communication, quantum computing, and quantum simulation. We emphasize that developing fully integrated quantum photonic chip which contains sources of quantum light, integrate circuits, modulators, quantum storage, and detectors are promising approaches for future quantum photonic technologies. Recent achievements in the large scale photonic chips for linear optical computing are also included. Finally, we illustrate the challenges toward high performance quantum information processing devices and conclude with promising perspectives in this field.

关键词： quantum photonic chip entanglement production and manipulation quantum communication quantum computing

Mission-oriented capability evaluation for combat network based on operation loops

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Defence technology（防务技术） 2024年第12期42卷 156-175页

作者： Yang Wang Junyong Tao Xiaoke Zhang Guanghan Bai Yunan Zhang laboratory of Science and technology on Integrated Logistics Support College of Intelligence Science and TechnologyNational University of Defense TechnologyChangsha 410073China National key laboratory for Complex Systems Simulation Beijing 100101China

With continuous growth in scale,topology complexity,mission phases,and mission diversity,challenges have been placed for efficient capability evaluation of modern combat *** at the problems of insufficient mission consideration and single evaluation dimension in the existing evaluation approaches,this study proposes a mission-oriented capability evaluation method for combat systems based on operation ***,a combat network model is given that takes into account the capability properties of combat ***,based on the transition matrix between combat nodes,an efficient algorithm for operation loop identification is proposed based on the Breadth-First *** the mission-capability satisfaction of nodes,the effectiveness evaluation indexes for operation loops and combat network are proposed,followed by node importance *** a case study of the combat scenario involving space-based support against surface ships under different strategies,the effectiveness of the proposed method is *** results indicated that the ROI-priority attack method has a notable impact on reducing the overall efficiency of the network,whereas the O-L betweenness-priority attack is more effective in obstructing the successful execution of enemy attack missions.

关键词： Combat network Operation loop identification Mission-oriented network reliability network effectiveness evaluation Strike strategies

An Overview of General Theory of Security

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China Communications 2017年第7期14卷 1-10页

作者： Min Lei Yixian Yang Xinxin Niu Yu Yang Jie Hao information Security Center Beijing University of Posts and Telecommunications Guizhou University Guizhou Provincial Key Laboratory of Public Big Data Jiangsu Engineering Center of network Monitoring Nanjing University of Information Science & Technology

Cyber security lacks comprehensive theoretical guidance. General security theory, as a set of basic security theory concepts, is intended to guide cyber security and all the other security work. The general theory of security aims to unify the main branches of cyber security and establish a unified basic theory. This paper proposal an overview on the general theory of security, which is devoted to constructing a comprehensive model of network security. The hierarchical structure of the meridian-collateral tree is described. Shannon information theory is employed to build a cyberspace security model. Some central concepts of security, i.e., the attack and defense, are discussed and several general theorems on security are presented.

关键词： cyber security network attack and defense meridian-collateral theory

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Science China(information Sciences) 2022年第2期65卷 246-247页

作者： Juan DU Wei WANG Muzhou LI Meiqin WANG key laboratory of Cryptologic technology and information Security Ministry of EducationShandong University

Dear editor,QARMA[1]is a family of hardware-oriented lightweight tweakable block ciphers designed by *** contains two versions,which support block sizes of 64 and 128 bits,denoted by QARMA-64 and QARMA-128,*** structu... 详细信息

关键词： Tweakable Block Cipher QARMA Impossible Differential Related Tweakey MILP

A Robustness Model of Complex networks with Tunable attack information Parameter

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Chinese Physics Letters 2007年第7期24卷 2138-2141页

作者：吴俊谭跃进邓宏钟李勇 College of information Systems and Management National University of Defense Technology Changsha 410073

We introduce a novel model for robustness of complex with a tunable attack information parameter. The random failure and intentional attack known are the two extreme cases of our model. Based on the model, we study the robustness of complex networks under random information and preferential information, respectively. Using the generating function method, we derive the exact value of the critical removal fraction of nodes for the disintegration of networks and the size of the giant component. We show that hiding just a small fraction of nodes randomly can prevent a scale-free network from collapsing and detecting just a small fraction of nodes preferentially can destroy a scale-free network.

关键词： INTENTIONAL attack RANDOM GRAPHS RESILIENCE BREAKDOWN INTERNET