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An efficient coverage control algorithm for three-dimensional underwater sensor networks

Advances in information Sciences and Service Sciences 2012年第10期4卷 393-399页

作者： Xiao, Fu Yang, Yang Sun, Li Wang, Ruchuan Nanjing University of Posts and Telecommunications Nanjing 210003 China Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou 215006 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing 210003 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing 210003 China

Strategy of sensor nodes deployment is directly related to the cost and performance for underwater wireless sensor networks, which is largely determined the various service-quality improvement of wireless sensor networks. In order to improve the coverage of the target area, this paper presents a distributed algorithm of coverage control. Assume that nodes initially deployed on the surface of the water and can only move in vertical direction in 3-D space, the algorithm is first to control the nodes in-depth and relocate the nodes at different depths, then the nodes continue to adjust their depths until there is no augment for improving their coverage, and to achieve efficient coverage of the three-dimensional sensor networks ultimately. Experimental results show that compared with traditional random deployment method, the proposed coverage control algorithm can improve coverage of network effectively.

关键词： Quality control

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A public cryptosystem from R-LWE

A public cryptosystem from R-LWE

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IEEE International Conference on Communication Software and networks

作者： Wei, Ping Wu, Liqiang Yang, Xiaoyuan Hao, Bin Key Laboratory of Network and Information Security of APF Engineering College of APF Xi'an 710086 China Key Laboratory of Computer Network and Information Security Ministry of Education Xidian University Xi'an 710071 China

ISBN: (纸本)9781612844855

Recently Vadim Lyubashevsky etc. built LWE problem on ring and proposed a public cryptosystem based on R-LWE, which, to a certain extent, solved the defect of large public key of this kind, but it didn't offer parameter selections and performance analysis in detail. In this paper an improved scheme is proposed by sharing a ring polynomial vector that makes public key as small as 1/m of the original scheme in multi-user environments. In additions, we introduce a parameter r to control both the private key space size and decryption errors probability, which greatly enhances the flexibly and practicality. The correctness, security and efficiency are analyzed in detail and choice of parameters is studied, at last concrete parameters are recommended for the new scheme. © 2011 IEEE.

关键词： Encryption Hard problem based on lattice Lattices Noise Parameters selection Polynomials Public Cryptosystem Public key R-LWE

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Analysis and study on detection of credict fraud in E-commerce

Analysis and study on detection of credict fraud in E-commer...

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International Conference on Future computer Science and Education

作者： Deng, Kaiyong Zhang, Ru Zhang, Dongfang Jiang, Wen Feng Niu, Xinxin Guo, Hong Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing China Key Lab. of Information Network Security of Ministry of Public Security Shanghai China

ISBN: (纸本)9780769544229

An algorithm of applying Bedford's law to detect credit fraud in e-commerce is proposed in the paper and the feasibility is studied. The weakness of the algorithm for detecting financial fraud via Benford correlation coefficients is analyzed and a new detection method for e-commerce fraud defined as credit algorithm based on Bedford' s law is established, providing better performance of reliability and precision. © 2011 IEEE.

关键词： Electronic commerce

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Agent Modeling of User Preferences Based on Fuzzy Classified ANNs in Automated Negotiation

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Journal of Donghua University(English Edition) 2011年第1期28卷 45-48页

作者：顾铁军汤兵勇马溪骏李毅 Glorious Sun School of Business and Management Donghua University Institute of Computer Network System Hefei University of Technology Information Security System Testing Lab The Third Research Institute of Ministry of Public Security

In agent-based automated negotiation research area,a key problem is how to make software agent more adaptable to represent user preferences or suggestions,so that agent can take further proposals that reflect user requirements to implement ecommerce activities like automated *** difficulty lies in the uncertainty of user preferences that include uncertain description and contents,non-linear and dynamic *** this paper,fuzzy language was used to describe the uncertainty and combine with multiple classified artificial neural networks(ANNs) for self-adaptive learning of user *** refinement learning results of various negotiation contracts' satisfaction degrees in the extent of fuzzy classification can be *** to unclassified computation,the experimental results illustrate that the learning ability and effectiveness of agents have been improved.

关键词： agent automated negotiation user modeling artificial neural network（ANN） fuzzy classification

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Spatial domain image steganalysis based on wavelet coefficient dependency

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2012年第5期23卷 972-979页

作者： Zhang, Min-Qing Lei, Yu Computer College of Northwestern Polytechnical University Xi'an Shaanxi 710072 China Key Laboratory of Network and Information Security of Armed Police Force Engineering University of Armed Police Force Xi'an 710086 China

Based on wavelet coefficient dependency, a novel general image steganalysis technique for spatial domain steganography is proposed. First, the mutual information is exploited to analyze the change on the scale and orientation dependency between wavelet coefficients, which is caused by the embedding of a message, and the Markov model is applied to model the dependency between wavelet cofficients so as to extract intrascale and interscale transition probability matrices which are used as feature vectors. Then, a weighted feature fusion method is used to fuse these feature vectors and the fisher linear discriminant (FLD) is designed to classify them. The experiments on least significant bit (LSB), LSB matching and stochastic modulation (SM) steganography show that the method can detect stego images reliably and the detection accuracy of this method exceeds that of its closest competitors obviously under the same computer complexity.

关键词： Steganography

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Text content filtering based on chinese character reconstruction from radicals

Text content filtering based on chinese character reconstruc...

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作者： He, Wenlei Liu, Gongshen Luo, Jun Lin, Jiuchuan School of Information Security Engineering Shanghai Jiao Tong University China Key Lab of Information Network Security of Ministry of Public Security Third Research Institute of Ministry of Public Security China

ISBN: (纸本)9783642236013

Content filtering through keyword matching is widely adopted in network censoring, and proven to be successful. However, a technique to bypass this kind of censorship by decomposing Chinese characters appears recently. Chinese characters are combinations of radicals, and splitting characters into radicals pose a big obstacle to keyword filtering. To tackle this challenge, we proposed the first filtering technology based on combination of Chinese character radicals. We use a modified Rabin-Karp algorithm to reconstruct characters from radicals according to Chinese character structure library. Then we use another modified Rabin-Karp algorithm to filter keywords among massive text content. Experiment shows that our approach can identify most of the keywords in the form of combination of radicals and yields a visible improvement in the filtering result compared to traditional keyword filtering. © 2011 ICST Institute for computer Science, Social Informatics and Telecommunications Engineering.

关键词： Pattern matching

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L-WMxD: Lexical based Webmail XSS Discoverer

L-WMxD: Lexical based Webmail XSS Discoverer

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2011 IEEE Conference on computer Communications Workshops, INFOCOM WKSHPS 2011

作者： Tang, Zhushou Zhu, Haojin Cao, Zhenfu Zhao, Shuai Department of Computer Science and Engineering Shanghai Jiao Tong University China Key Laboratory of Information Network Security Ministry of Public Security China

ISBN: (纸本)9781457702488

XSS (Cross-Site Scripting) is a major security threat for web applications. Due to lack of source code of web application, fuzz technique has become a popular approach to discover XSS in web application except Webmail. This paper proposes a Webmail XSS fuzzer called L-WMxD (Lexical based Webmail XSS Discoverer). L-WMxD , which works on a lexical based mutation engine, is an active defense system to discover XSS before the Webmail application is online for service. The engine is initialized by normal JavaScript code called seed. Then, rules are applied to the sensitive strings in the seed which are picked out through a lexical parser. After that, the mutation engine issues multiple test cases. Newly-generated test cases are used for XSS test. Two prototype tools are realized by us to send the newly-generated test cases to various Webmail servers to discover XSS vulnerability. Experimental results of L-WMxD are quite encouraging. We have run L-WMxD over 26 real-world Webmail applications and found vulnerabilities in 21 Webmail services, including some of the most widely used Yahoo!Mail, Mirapoint Webmail and ORACLE' Collaboration Suite Mail. © 2011 IEEE.

关键词： Engines

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Feature selection based on particle swarm optimal with multiple evolutionary strategies

Feature selection based on particle swarm optimal with multi...

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International Conference on information Fusion

作者： Jing Zhao Chongzhao Han Bin Wei Qi Zhao Peng Xiao Kedai Zhang MOE Key Lab For Intelligent Networks and Network Security SKLMSE Institute of Integrated Automation School of Elect. and Info. Engineering Xi'an Jiaotong University Xi'an China System Engineering Institute of Electronic and Information Engineering School Xi'an Jiaotong University Xi'an China Beijing Institute of Graphics Beijing China

ISBN: (纸本)9780982443859

Feature selection is an effective data preprocessing step to reduce the dimension of feature space and save storage space. Binary particle swarm optimization (BPSO) has been applied successfully to solve feature selection problem. But it was easy to fall into local optimal point. M2BPSO was an improved BPSO algorithm. The particles of M2BPSO were updated by using various evolutionary strategies according to the performance of them, in addition, the mutation was used to overcome premature. In this paper, we adopted M2BPSO to solve feature selection problem. To test the validity of the algorithm, we compared it with various versions of BPSO methods. Experimental results showed that M2BPSO could effectively solve the feature selection problem.

关键词： Binary Particle swarm optimal multiple evolutionary strategies feature selection support vector machine wrapper method

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An architecture description language based on dynamic description logics for self-healing systems

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International Journal of Advancements in Computing Technology 2012年第18期4卷 89-96页

作者： Wang, Zhuxiao Peng, Hui Guo, Jing Wu, Kehe Cui, Wenchao Wang, Xiaofeng School of Control and Computer Engineering State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China Education Technology Center Beijing International Studies University Beijing 100024 China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100029 China School of Control and Computer Engineering Institute of Electric Information Security Engineering Research Center of Power Information North China Electric Power University Beijing 102206 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

As biological systems exhibit adaptation, healing and robustness in the face of changing environmental behavior, this paradigm has actuated research dealing with the concept of self-healing systems, which attempt to heal themselves in the sense of recovering from malicious attacks and rectifying of system faults. The goal of self-healing systems is to provide survivable systems that require high dependability, robustness, adaptability, and availability. Such systems maintain one or more models, whether external or internal, at run time as a basis for identifying problems and resolving them. This article describes an architectural description language, called ADML, which is being developed as a new formal language and/or conceptual model for representing evolving software architectures. The ADML embraces dynamic change as a fundamental consideration, supports a broad class of adaptive changes at the architectural level, and offers a uniform way to represent and reason about both static and dynamic aspects of self-healing systems. Because the ADML is based on the Dynamic Description Logic DDL(SHON (D)), which can represent both dynamic semantics and static semantics under a unified logical framework, architectural ontology entailment for the ADML languages can be reduced to knowledge base satisfiability in DDL(SHON (D)), and dynamic description logic algorithms and implementations can be used to provide reasoning services for ADML. In this article, we present the syntax of ADML, explain its underlying semantics using the Dynamic Description Logic DDL(SHON (D)), and exemplify our approach by applying it to the domain of load balancing a wireless remote-access system;the preliminary results certify the potential of the approach.

关键词： Formal languages

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The availability of fast-flux service networks

The availability of fast-flux service networks

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2011 International Conference on Selected Topics in Mobile and Wireless networking, iCOST 2011

作者： Xu, Yunfeng Lu, Yansheng Guo, Zhengbiao School of Computer Science and Technology Hua Zhong University of Science and Technology Wuhan China Hubei Province Public Security Bureau to Defend the Corps Cyber Security Key Lab of Information NetWork Security Ministry of Public Security China

ISBN: (纸本)9781457720048

Fast-flux service network (FFSN) is consisted of a large scale of computers which have two main functions. Firstly, by providing a pool of huge number of IP addresses, the controller of FFSN can choose the IPs to provide services for their own domain name. Secondly, these computers can be served as agents to hide mother-ship. The character of FFSN is that the DNS records of domain name changes constantly at a high frequency. In this paper, we analyze the issue on the reliability of FFSN. The issue is resulted from the uncontrollable nodes of FFSN. We establish a model to describe the reliability by the theory of Poisson Process, and analyze the relationship between the reliability of FFSN and its size. © 2011 IEEE.

关键词： Reliability theory

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