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International Conference on networking and Services (ICNS)

作者： Qindong Sun Hongli Qiao Nan Wang Network Computing and Security Key Laboratory of Shaanxi Xi''an University of Technology Xi'an China MOE Key Laboratory of Intelligent and Network Security Xi''an Jiaotong University Xi'an China

How to judge the relationship between mobile short messages is the key technology of mobile short message topic detection. The characteristics of the mobile SMS text are discussed in this paper, and the association of different SMS topic feature words is analyzed. Then a computing method of the association degree between different SMS feature words is proposed, which is based on leverage formula. The experimental results show that this method can effectively calculate the association degrees between SMS feature words, which could help to extract hot topics in corpus of a mess of short messages.

关键词： Computer networks Data mining Internet Mobile computing Clustering algorithms Information services Web sites Detection algorithms Independent component analysis IP 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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SkyF2F: Censorship Resistant via Skype Overlay network

SkyF2F: Censorship Resistant via Skype Overlay Network

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WASE International Conference on Information Engineering, ICIE

作者： Shoufeng Cao Longtao He Zhongxian Li Yixian Yang Information Security Center State Key Laboratory of Networking and Switching Technology Key Laboratory of network and information attack & defence technology of MOE Beijing University of Posts and Telecommunications China Research Center of Information Security Institute of Computing Technology Chinese Academy and Sciences Beijing China

Internet censorship is on the rise as an increasing number of countries and companies block or monitor access to parts of the Internet. Many censorship resistant systems have been proposed, which rely on deploying many access points to the censored domain. Therefore they face the problem of discovering available nodes and deploying a large number of nodes. Opposite to many access point approach, we present a system building on existing overlay network, a low-cost solution for circumventing Internet, called SkyF2F. SkyF2F is a plug-in for Skype client that allows users to establish a covert communication tunnel across Skype overlay network. We describe the design, a prototype implementation and security analysis of SkyF2F. Our security analysis shows that SkyF2F can successfully circumvent several sophisticated censoring techniques.

关键词： Information security Internet Computer security National security Laboratories Cryptography Buildings Prototypes Monitoring IP networks

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Node-failure tolerance of topology in wireless sensor networks

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International Journal of network security 2008年第2期7卷 261-264页

作者： Wang, Liang-Min Ma, Jian-Feng Guo, Yuan-Bo The Computer School Jiangsu University Zhenjiang 212013 China Key Laboratory of Computer Network and Information Security of Education Ministry Xidian University Xi'an Shaanxi 710071 China School of Electronic Technology Engineering University of PLA Zhengzhou 450004 China

Three basic questions are presented and answered in researching on nodefailure topology in wireless sensor network. First, what is the definition of nodefailure tolerance? Second, how to evaluate this tolerance abilit... 详细信息

关键词： Sensor nodes

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ID-based threshold proxy signcryption scheme from bilinear pairings

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International Journal of security and networks 2008年第3期3卷 206-215页

作者： Li, Fagen Xin, Xiangjun Hu, Yupu School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 Sichuan China Department of Information and Computing Science Zhengzhou University of Light Industry Zhengzhou 450002 Henan China Key Laboratory of Computer Networks and Information Security Xidian University Xi'an 710071 Shaanxi China

A (t, n) threshold proxy signcryption scheme allows t or more proxy signcrypters from a designated group of n proxy signcrypters to signcrypt messages on behalf of an original signcrypter. In this paper, a new identity-based threshold proxy signcryption scheme from bilinear pairings is proposed. Our construction is based on Baek and Zheng's pairing-based verifiable secret sharing scheme and Libert and Quisquater's identity-based signcryption scheme. As compared to Wang and Liu's identity-based threshold proxy signcryption scheme, our scheme is more secure and efficient. © 2008, Inderscience Publishers.

关键词： network security

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AN ADULT SHORT MESSAGE RECOGNITION ALGORITHM BASED ON RESTRICTED CLOSE TEST OPTIMIZATION

AN ADULT SHORT MESSAGE RECOGNITION ALGORITHM BASED ON RESTRI...

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2008 International Conference on Machine Learning and Cybernetics(2008机器学习与控制论国际会议)

作者： QIN-DONG SUN XIN-BO HUANG JIU-LONG ZHANG Network Computing and Security Tech.Key Lab.of Shaanxi Province Xi'an University of Technology Xi' College of Electronics and Information Xi'an Polytechnic University Xi'an 710048 China Network Computing and Security Tech.Key Lab.of Shaanxi Province Xi'an University of Technology Xi'

The flooding of adult short message has become an urgent problem of safety of message content. Existing researches on short message filtering pay much attention to rubbish and advertising short messages, and the granularity of categorization were too coarse. With an analysis of the characteristics of adult short messages, and considering the effectiveness and real time performance of filtering algorithm, this paper proposes an adult short message discriminating algorithm based on adultism-degree computation, and a threshold selecting algorithm based on close test optimization. Experiments show that the proposed algorithm can effectively discriminate adult short message with a 94.4％ correction rate, meanwhile it can meet the requirements of practical processing.

关键词： Content security Adult short message Content filtering Threshold selecting

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Quick Finding of network Video Stream

Quick Finding of Network Video Stream

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International Conference on Computer Science and Information technology (CSIT)

作者： Qindong Sun Shengli Li Xiaojun Guo Network Computing and Security Key Laboratory of Shaanxi Xi'an University of Technology Xi'an China School of Electronics and Information Engineering Xi'an Jiaotong University Xi'an China Department of Research and Development Xi'an Anzhi Science and Technology Corporation Xi'an China

network video technology develops quickly in recent years and the applications of network video are various. The effectively managing of the application based on network video is necessary for network flow management, network security, etc. and finding video stream from the network flow is the precondition and foundation. This paper analyzes the characteristics of the video stream packets, and draws a conclusion that each network video stream type can be labeled uniquely by one characteristic string, based on which, we can find video streams in network flow easily. The experiment results show that the method is able to find network video streams accurately.

关键词： Streaming media Protocols Decision support systems Payloads Servers IP networks Internet

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Provable Efficient Certificateless Group key Exchange Protocol

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Wuhan University Journal of Natural Sciences 2007年第1期12卷 41-45页

作者： CAO Chunjie MA Jianfeng MOON Sangjae Key Laboratory of Computer Networks and InformationSecurity Ministry of Education Xidian University Xi＇ an 710071Shaanxi China Mobile Network Security Technology Research Center Kyungpook National University Daeyu 702701 Korea

Certificateless public key cryptography （CL-PKC） avoids the inherent escrow of identity-based cryptography and does not require certificates to guarantee the authenticity of public keys. Based on CL-PKC, we present an efficient constant-round group key exchange protocol, which is provably secure under the intractability of computation Diffie-Hellman problem. Our protocol is a contributory key exchange with perfect forward secrecy and has only two communication rounds. So it is more efficient than other protocols. Moreover, our protocol provides a method to design efficient constant-round group key exchange protocols and most secret sharing schemes could be adopted to construct our protocol.

关键词： group key exchange certificateless public key cryptography provable security bilinear pairings

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A pairing-based signcryption scheme using self-certified public keys

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International Journal of Computers and Applications 2007年第3期29卷 278-282页

作者： Li, F. Xin, X. Hu, Y. School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu Sichuan 610054 China Department of Information and Computing Science Zhengzhou University of Light Industry Zhengzhou Henan 450002 China Key Laboratory of Computer Networks and Information Security Xidian University Xi'an Shaanxi 710071 China

In recent years, many pairing-based signcryption schemes have been proposed. There is, however, an inherent weakness in these schemes: the private key escrow problem, in which the "trusted" private key generator (PKG) can easily impersonate any user at any time without being detected. In this paper we present a pairing-based signcryption scheme using self-certified public keys. In our scheme, users can choose their private keys independently. The public keys of users can be implicitly verified with the subsequent signature verification in a logically single step. A trusted PKG is no longer required. If the dishonest PKG impersonates an honest user to communicate with others, the user can provide a proof of treachery of the PKG afterwards, which is similar to certificate-based systems.

关键词： Public key cryptography

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Robust Disaster Recovery System Model

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 170-174页

作者： WANG Kun SU Rui-dan LI Zeng-xin CAI Zhen ZHOU Li-hua Key Laboratory of Computer Network and Information Security of the Ministry of Education Xidian University Xi＇ an 710071 Shaanxi China National Information Security Engineering and Technology Research Center Beijing 100093 China

Highly security-critical system should possess features of continuous service. We present a new Robust Disaster Recovery System Model （RDRSM）. Through strengthening the ability of safe communications, RDRSM guarantees the secure and reliable command on disaster recovery. Its self-supervision capability can monitor the integrality and security of disaster recovery system itself. By 2D and 3D rea-time visible platform provided by GIS, GPS and RS, the model makes the using, management and maintenance of disaster recovery system easier. RDRSM possesses predominant features of security, robustness and controllability. And it can be applied to highly security-critical environments such as E-government and bank. Conducted by RDRSM, an important E-government disaster recovery system has been constructed successfully. The feasibility of this model is verified by practice. We especially emphasize the significance of some components of the model, such as risk assessment, disaster recovery planning, system supervision and robust communication support.

关键词： continuous service E-government information security disaster recovery high availability risk assessment data backup

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