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1st International Conference on Advances in P2P Systems, AP2PS 2009

作者： Zhou, Gang Yu, Jianjun National Digital Switching System Engineering and Technological Research Center 450002 France State Key Lab. of Software Development Environment Beihang University 100191 China Computer Network Information Center Chinese Academy of Sciences 100190 China

ISBN: (纸本)9780769538310

We present the design of pService system for P2P Web services discovery supporting similarity earch with its locality-preserving feature based on modified Skip Graph. In pService, the most important property (e.g. service name) of a service is viewed as the indexing key of a peer node. The other properties are extracted as multiattributes which would be mapped into one-dimensional indices using HSFC (Hilbert Space Filling Curve), and assigned to membership vector of the peer node. These two features help to support similarity search in two aspects: peer nodes with similar indexing keys would be distributed neighborly, peer nodes with similar indices will connect to each other through routing table. Our evaluation showed that the pService performs considerable Web services discovery efficiency. © 2009 IEEE.

关键词： Web services

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An Efficient Anonymous Routing Protocol for Mobile Ad Hoc networks

An Efficient Anonymous Routing Protocol for Mobile Ad Hoc Ne...

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The Fifth International Conference on information Assurance and security(第五届信息保障与安全国际会议)

作者： Xiaoqing Li Hui Li Jianfeng Ma Weidong Zhang Key Lab of Computer Networks and Information Security of Ministry of Education Xidian University Xi'anP.R.China

ISBN: (纸本)9780769537443

Providing anonymous routing in mobile ad hoc networks (MANET) has been a hot issue for the purpose of security and privacy concerns. But there are very few have been done about providing a valid method to detect malicious node and providing a trustworthy protection over whole network. In this paper, we introduce a localized trust management which can primarily remove malicious nodes, and propose an efficient anonymous routing protocol by node that participates in the protocol encrypts entire message with trust key and says Hello to its ancestor within expiration time. It makes malicious node can be detected and isolated from the network. In this way, a anonymous and secure route path can be established in a hostile environment. Meanwhile, it is able to efficiently against the Denial-of-Service (DoS) attack.

关键词： Anonymous Routing protocol DoS attacks ad hoc network

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Improvement of MODIS 8-day LAI/FPAR product with temporal filters to generate high quality time-series product

Improvement of MODIS 8-day LAI/FPAR product with temporal fi...

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2009 Joint Urban Remote Sensing Event

作者： Huifang, Zhang Runhe, Shi Honglin, Zhong Peiqing, Qu Juan, Sun Wenpeng, Lin Su, Li Key Lab. of Geographic Information Science Ministry of Education East China Normal University Shanghai China Key Laboratory of Ecosystem Network Observation and Modeling IGSNRR CAS Beijing China Key Lab. of Urban Ecology and Environment Restoration Shanghai Normal University Shanghai China Computer College Beijing Technology and Business University Beijing China

ISBN: (纸本)9781424434619

Numerous studies have reported that the timeseries terrestrial parameters such as the Normalized Difference Vegetation Index (NDVI), Leaf Area of Index (LAI), Fraction of Absorbed Photosynthetic Active Radiation (FPAR), derived from NOAA/AVHRR, SPOT/VEGETATION, TERRA or AQUA/MODIS, have played significant roles in researching the global environment, terrestrial ecosystems and related ecological researches. However, the remotely sensed signals are interfered severely by atmospheric conditions especially clouds and such noises exists in the time-series products as well. Therefore, to obtain a high quality time-series of terrestrial parameter is a necessary step before further studies. At present several methods have been applied to reduce the noise to construct a fine time-series of NDVI, but few studies concerning the other key terrestrial parameters, such as LAI, FPAR etc. In this paper, after comparing general methods in literatures, we designed a new method based on the Savitzky-Golay filter, which was applied to improve the quality of MODIS 8-Day LAI/FPAR Product to generate timeseries of LAI and FPAR with high quality. Our validation results indicate that more smooth and realistic time-series curves of LAI/FPAR can be obtained by using this new method, which exemplify the dynamic change of forests, crop or plants and key input parameters in modeling the complex land surface processing. ©2009 IEEE.

关键词： Time series

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Support vector machine for suppressing error method

Support vector machine for suppressing error method

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1st International Conference on information Science and Engineering, ICISE2009

作者： Lu, Shuxia Shi, Pu Chen, Ming Key Lab. of Machine Learning and Computational Intelligence College of Mathematics and Computer Science Hebei University Baoding China Baoding Pascali Cable TV Integrater Information Network Co. Ltd. Baoding China College of Mathematics and Computer Science Hebei University Baoding China

ISBN: (纸本)9780769538877

Support Vector Machine (SVM) is sensitive to noises and outliers. For reducing the effect of noises and outliers, we propose a novel SVM for suppressing error function. The error function is limited to the interval of [0, 1]. The separation hypersurface is simplified and the margin of hypersurface is widened. Experimental results show that our proposed method is able to simultaneously increase the classification efficiency and the generalization ability of the SVM.

关键词： Support vector machines

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A novel key pre-distribution scheme using one-way hash chain and bivariate polynomial for wireless sensor networks

A novel key pre-distribution scheme using one-way hash chain...

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IEEE International Workshop on Anti-counterfeiting, security, Identification, ASID

作者： Xu Li Jinbo Shen Key Lab of Network Security and Cryptology Fujian Normal University Fuzhou China Department of Computer Science Fujian Normal University Fuzhou China

security is a big challenge when wireless sensor networks are deployed in a hostile environment. Due to the computational and storage overheads, traditional asymmetric cryptographic protocols are not suitable for the resource-constrained wireless sensor nodes. Several key pre-distribution schemes have been proposed in literature to establish pairwise key between sensor nodes, but most of which only work for small-scale networks due to their linearly increased communication overhead and key storage overhead. Furthermore, some existing key pre-distribution schemes are not secure when the number of compromised sensor nodes exceeds a threshold value. In this paper a novel key pre-distribution scheme was put forward based on one-way hash chain and bivariate polynomial, which can afford sufficient security no matter how many sensor nodes are compromised compared with existing typical key pre-distribution schemes. Better network connectivity, lower key storage overhead and lower communication overhead can also be achieved by the proposed scheme.

关键词： Polynomials Wireless sensor networks Cryptography Communication system security computer security Cryptographic protocols Patient monitoring Large-scale systems computer science computer networks

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The Algorithm of Short Message Hot Topic Detection Based on Feature Association

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information Technology Journal 2009年第2期8卷 236-240页

作者： Sun, Qindong Wang, Qian Qiao, Hongli School of Computer Science and Engineering Xi'an University of Technology Xi'an 710048 China Network Computing and Security Key Lab of Shaanxi Xi'an University of Technology Xi'an 710048 China

Aiming at the mobile short message (SMS) hot topic extraction, the text features and statistical regularity of SMS are analyzed in this study. The formal description of SMS hot topic is given and an algorithm of SMS hot topic extraction based on feature association analysis is proposed. According to the proposed algorithm, feature words of SMS can be clustered into different word bags by calculating the association degree of these feature words and the hot topic can be identified by means of word bags matching. Experiments results show that the proposed algorithm can detect the hot topic in the SMS messages effectively, which is useful to the analysis of SMS popular sentiments. © 2009 Asian network for Scientific information.

关键词： Data mining

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Ideal Perfect Multilevel Threshold Secret Sharing Scheme

Ideal Perfect Multilevel Threshold Secret Sharing Scheme

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The Fifth International Conference on information Assurance and security(第五届信息保障与安全国际会议)

作者： Changlu Lin Lein Harn Dingfeng Ye Key Laboratory of Network Security and Cryptology Fujian Normal University China State Key Laborat Department of Computer Science Electrical Engineering University of Missouri-Kansas CityUSA State Key Laboratory of Information Security Graduate University of Chinese Academy of SciencesChin

ISBN: (纸本)9780769537443

Shamir proposed the first (t, n) threshold secret sharing scheme. Shamir's scheme is ideal and perfect. In this paper, we propose two modifications of Shamir's secret sharing scheme. In our first modification, each shareholder keeps both x-coordinate and y-coordinate of a polynomial as private share. In our second modification, dealer uses polynomial with degree larger than the threshold value t to generate shares for a (t, n) threshold scheme. We show that these two modified schemes are ideal and perfect. Using these two modifications, we design a multilevel threshold secret sharing schemes (MTSS). We prove that the proposed scheme is secure.

关键词： Secret sharing threshold multilevel threshold secret sharing

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Combining opportunistic routing with dynamic source routing for wireless mesh networks

Combining opportunistic routing with dynamic source routing ...

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Institution of Engineering and Technology International Communication Conference on Wireless Mobile and Computing

作者： Shen, Qiang Fang, Xuming Kim, Sunmyeng He, Rong Provincial Key Lab. of Information Coding and Transmission Southwest Jiaotong University Chengdu 610031 China High Performance Network Lab. Institute of Acoustics Chinese Academy of Sciences Beijing 100190 China School of Computer and Software Engineering Kumoh National Institute of Technology Gyeongbuk 730701 Korea Republic of

ISBN: (纸本)9781849191388

Routing in wireless mesh networks presents a great challenge due to unreliable wireless links and collisions. Recently, a new routing method, opportunistic routing (OR), is proposed to deal with them by exploiting broadcast nature of wireless networks. OR relies on the global knowledge of networks to select relays and determine priorities. In this paper, we propose a new routing scheme, OxDSR, which combines OR and dynamic source routing (DSR) and performs opportunistic transmissions with the help of the local information and the traditional route obtained by DSR. By taking the duplicates and additional wireless resource consumed by multiple ACK frames into consideration, we propose a new metric, equivalent data rate, to select and prioritize relays. Extensive simulation study shows that the proposed OxDSR is more resilient and achieves higher throughput than DSR based on the expected transmission count routing metric.

关键词： Medium access control

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security Analysis of Two Remote User Authentication Schemes Using Bilinear Pairings

Security Analysis of Two Remote User Authentication Schemes ...

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International Conference on Management of e-Commerce and e-Government, ICMECG

作者： Zuowen Tan Key Laboratory of Network Security and Cryptology School of Mathematics and Computer Science Fujian Normal University Fuzhou China School of Information Technology Jiangxi University of Finance and Economics Nanchang Jiangxi China State Key Laboratory of Information Security Institute of Software of Chinese Academy of Sciences Beijing China

Recently, Das et al. and Tseng et al. proposed a remote user authentication scheme using bilinear pairings, respectively. They can provide a flexible password change option to the users without any help from the remote server. However, some weaknesses of the two bilinear pairing based remote password authentication schemes are found in the paper. The schemes suffer from offline password guessing attack and impersonation attacks.

关键词： Authentication Identity-based encryption network servers information security Elliptic curve cryptography Public key Elliptic curves computer security Galois fields computer network management

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A practical electronic payment scheme

A practical electronic payment scheme

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International Symposium on Communications and information Technologies (ISCIT)

作者： Jingwei Liu Kyung Sup Kwak Key Laboratory of Computer Network and Information Security Ministry of Education Xidian University Xi'an China UWB Wireless Communications Research Center Inha University Incheon South Korea

ISBN: (纸本)9781424445219

In this paper, by converse using blind signature, we propose a practical electronic payment scheme for electronic commerce. This scheme is different from the existing schemes used widely in the Internet at present and it does not need the strong trust between customer and merchant. In this scheme, a semi-trusted third party (S-TTP) is introduced to provide a fair commerce environment. The S-TTP takes part in the protocol online and is not leaked any secure information about the business. Moreover, the users do not need to register to S-TTP. An advantage of the scheme is that this approach does not require the intervention of the third party in case of dispute, if one user cheats or simply crashes.

关键词： Protocols Cryptography Public key Electronic commerce Digital signatures Electronic mail Internet laboratories computer networks information security

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