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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

A trinomial type of σ-LFSR oriented toward software implementation

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Science in China(Series F) 2007年第3期50卷 359-372页

作者： ZENG Guang HE KaiCheng han wenbao Department of Applied Mathematics Information Engineering University Zhengzhou 450002 China

In this paper, we introduce a new type of feedback shift register based on words, called G-linear feedback shift register （σ-LFSR） which can make full use of the instructions of modern CPUs so that we can find good σ-LFSR with simple structure and fast software implementation. After analysis, we find a class of simple σ-LFSR with maximal period and give an algorithm of searching for those σ-LFSRs. As a result, we provide a new optional fast component in the design of modern wordbased stream ciphers.

关键词： finite field stream cipher σ-LFSR primitive polynomial fast software implementation

New strategy for searching disturbance vector of SHA-1 collision attack

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Science China(Information Sciences) 2017年第12期60卷 280-282页

作者： Hao FENG Guang ZENG wenbao han Yang YANG State Key Laboratory of Mathematical Engineering and Advanced Computing Centrum Wiskunde & Informatica Amsterdam 1098 XG Zhengzhou Information Science and Technology Institute Trusted Computing and Information Assurance Laboratory Institute of SoftwareChinese Academy of Sciences

Dear editor,We present a new algorithm to search for effective disturbance vectors with a complexity of 2;based on the following two properties of disturbance *** property is the weight correlation between the first 16-step disturbance vectors and the60-step disturbance *** other property requires all the differences of the active bit positions of the first 16-step disturbance vectors to be

关键词： New strategy for searching disturbance vector of SHA-1 collision attack

Survey on cyberspace security

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Science China(Information Sciences) 2015年第11期58卷 5-47页

作者： ZhanG HuanGuo han wenbao LAI XueJia LIN DongDai MA JianFeng LI JianHua Computer School of Wuhan University State Key Laboratory of Mathematics Engineering and Advanced Computing Department of Computer Shanghai Jiaotong University Institute of Information Engineering Chinese Academy of Sciences School of Cyber Engineering Xidian University School of Information Security Engineering Shanghai Jiaotong University

Along with the rapid development and wide application of information technology, human society has entered the information era. In this era, people live and work in cyberspace. Cyberspace is the collection of all information systems; it is the information environment for human survival. Therefore, it is necessary to ensure the security of cyberspace. This paper gives a comprehensive introduction to research and development in this field, with a description of existing problems and some currently active research topics in the areas of cyberspace itself, cyberspace security, cryptography, network security, information system security and information content security.

关键词： cyberspace security information security cryptography network security information system security information content security

GOPPA CODES FROMARTIN-SCHREIER FUNCTION FIELDS

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Chinese Annals of Mathematics,Series B 1994年第3期15卷 311-320页

作者： han wenbao(Depatmellt of Mathematics, Sichuan Universityt Chengdu 610064, Sichuan, China.) 四川大学数学系四川成都 610064

A class of Goppa codes is constructed by using Artin-Schreier function fields, of which thenumber of prime divisors of degree olle is obtained for some cases, and their minimum distance,duallty and selfeduality are discussed. At laSt the sublield subcode of Artin-Schreier code isinvestigated, the true dimension under certain conditions is given and the covering radius andminimum distance are estimated.

关键词： Artin-Schreier functioll field Goppa code Self-duality.

Walsh Spectrum Properties of Rotation Symmetric Boolean Function

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1862-1864页

作者： WANG Yongjuan han wenbao LI Shiqu Institute of Information Engineering Information Engineering University Zhengzhou 450002 Henan China

Rotation symmetric function was presented by Pieprzyk. The algebraic configuration of rotation symmetric（RotS） function is special. For a Rots n variables function f（x1, x2, …, xn） we have f（ρn^k （x1, x2, …xn））=f（x1, x2, …, xn） for k=0, 1, …, n-1. In this paper, useing probability method we find that when the parameters of RotS function is under circular translation of indices, its walsh spectrum is invariant. And we prove the result is both sufficient and necessary.

关键词： rotation symmetric function rotation shift Walsh spectra

Analysis of the Design Methods of Word Oriented Linear Feedback Shift Registers

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Wuhan University Journal of Natural Sciences 2008年第6期13卷 712-716页

作者： ZENG Guang han wenbao HE Kaicheng Information Engineering Institute Information Engineering University Zhengzhou 45002 Henan China

Based on analysis of the structure characteristics and implementation methods of some representative word oriented linear feedback shift registers （LFSRs） in several modem software oriented stream ciphers, this paper firstly classifies the word oriented LFSRs into two classes： the machine instruction type and the arithmetic type. The similarities and differences between each type are illustrated by concrete examples. Then we give a detailed analysis about the word oriented LFSRs in each category from design structure, cryptographic properties and implementation issue aspects. Finally, some basic design criteria for modem word oriented LFSRs and suitable for software implementation are summarized.

关键词： stream cipher word oriented design linear feedback shift register (LFSR) fast software encryption

Biological data processing based on bio-processor unit(BPU), a new concept for next generation computational biology

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Science China(Life Sciences) 2018年第5期61卷 597-598页

作者： Di Liu Dongbo Bu Tieliu Shi Jianxiao Quan Depeng Wang Yongyong Shi Xiao-Chen Bo wenbao han Computational Virology Group Wuhan Institute of Virology Chinese Academy of Sciences Wuhan 430071 China Key Laboratory of InteUigent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China Center for Bioinformatics and Computational Biology and the Institute of Biomedical Sciences School of Life Sciences East China Normal University Shanghai 200214 China State Key Laboratory of Mathematical Engineering and Advanced Computation Wuxi 214122 China Jiangsu Variable Supercomputer Tech Co Ltd. Wuxi 214125 China NextOmics Blosctences Wuhan 430074 China Bio-X Institutes Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education) Shanghai Jiao Tong University Shanghai 200030 China Beijing Institute of Radiation Medicine Beifing 100850 China

The revolution of biotechnology has pushed forward life sciences into the Big Data ***,high-throughput bio-techniques have greatly accelerated the integration of biology,computing and informatics,and hence substantially pushed forward the development of bioinformatics and computational *** to the latest report of data deposition within National Centre for Biotechnology Information（NCBI）,the genome sequencing projects have increased 49.94%.

关键词：计算生物学简历处理器数据基信息科学生物信息学生命科学 NCBI

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基于SIMD指令的ECC攻击算法研究

计算机研究与发展 2012年第7期49卷 1553-1559页

作者：赵龙韩文报杨宏志解放军信息工程大学信息工程学院信息研究系郑州450002

ECC是目前比特安全强度最高的公钥密码体制,对它的攻击需要大量的计算资源.基于SIMD指令和bitslice数据结构设计了GF(2m)上的ECC攻击算法,并对核心模块进行了优化.利用比特交换的方法提出了一个bitslice数据结构和非bitslice数据结构的... 详细信息

ECC是目前比特安全强度最高的公钥密码体制,对它的攻击需要大量的计算资源.基于SIMD指令和bitslice数据结构设计了GF(2m)上的ECC攻击算法,并对核心模块进行了优化.利用比特交换的方法提出了一个bitslice数据结构和非bitslice数据结构的快速转换算法,计算复杂度为O(nlogn),对算法简单调整后可适用于二元矩阵的快速转置;利用Karatsuba-Ofman算法和Montgomery并行求逆对椭圆曲线底层运算进行了优化,分析了计算复杂度.对ECC挑战中的ECC2-109和ECC2-131进行了测试,在单核Pentium 4 3.0GHz平台上的迭代速度分别为1 330 000次/s和980 000次/s,攻击效率比Chris Monico的公开程序提高了1倍.

关键词：椭圆曲线密码体制椭圆曲线离散对数问题 ECC挑战 Pollard rho算法 SIMD指令