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Pitfalls in Identity Based Encryption Using Extended Chebyshev Polynomial

China Communications 2012年第1期9卷 58-63页

作者： Qian Haifeng Li Xiangxue Yu Yu Department of Computer Science and Technology East China Normal University Shanghai 200241 P. R. China Hangzhou Key Lab of E-business and Information Security Hangzhou Normal University Hangzhou 310036 P. R. China State Key Laboratory of Integrated Services Networks Xidian University Xi＇an 710071 P. R. China

Chebyshev polynomials are used as a reservoir for generating intricate classes of symmetrical and chaotic pattems, and have been used in a vast anaount of applications. Using extended Chebyshev polynomial over finite field Ze, Algehawi and Samsudin presented recently an Identity Based Encryption （IBE） scheme. In this paper, we showed their proposal is not as secure as they chimed. More specifically, we presented a concrete attack on the scheme of Algehawi and Samsudin, which indicated the scheme cannot be consolidated as a real altemative of IBE schemes since one can exploit the semi group property （bilinearity） of extended Chebyshev polynomials over Zp to implement the attack without any difficulty.

关键词： IBE extended Chebyshev polynomial chaotic cryptography bilinearity

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Cross-layer detection for black hole attack in wireless network

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Journal of Computational information systems 2012年第10期8卷 4101-4109页

作者： Yi, Ping Zhu, Ting Liu, Ning Wu, Yue Li, Jianhua State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 China School of Information Security Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Computer Science Binghamton University Binghamton NY 13905 United States

Mobile ad hoc networks (MANETs) are especially vulnerable to attacks for lacking infrastructure and data transfer using wireless communication, especial for denial of service (DoS) attacks. Black hole and gray hole attack are two kinds of denial of service (DoS) attacks and can bring great damage to mobile ad hoc network. This paper demonstrates an adaptive approach to detecting black and gray hole attacks in MANET based on a cross layer design. In network layer, we proposed a path-based method to overhear the next hop's action. In MAC layer, a collision rate reporting system is established to estimate dynamic detecting threshold so as to lower the false positive rate under high network overload. This scheme does not send out extra control packets and saves the system resources of the detecting node. We choose DSR protocol to test the algorithm by ns-2 as simulation tool. The experiment result verifies our theory: the average detection rate is above 90% and the false positive rate is below 10%. Moreover, the adaptive threshold strategy contributes to decrease the false positive rate. © 2011 by Binary information Press.

关键词： Mobile ad hoc networks

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Practical privacy for value-added applications in vehicular ad hoc networks 5th

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5th International Conference on Internet and Distributed Computing systems, IDCS 2012

作者： Zhang, Lei Wu, Qianhong Qin, Bo Domingo-Ferrer, Josep Shanghai Key Laboratory of Trustworthy Computing Software Engineering Institute East China Normal University Shanghai China UNESCO Chair in Data Privacy Dept. of Comp. Eng. and Maths Universitat Rovira i Virgili TarragonaCatalonia Spain Key Lab. of Aerospace Information Security and Trusted Computing Ministry of Education Wuhan University School of Computer China Department of Maths School of Science Xi’an University of Technology China

ISBN: (纸本)9783642348822

Advances in mobile networking and information processing technologies have triggered vehicular ad hoc networks (VANETs) for traffic safety and value-added applications. Most efforts have been made to address the security concerns while little work has been done to investigate security and privacy for value-added applications in VANETs. To fill this gap, we propose a value-added application, specifically, a security and privacy preserving location-based service (LBS) scheme for VANETs. For each LBS transaction, the scheme provides authentication, integrity and non-repudiation for both the service provider and the user. A user can obtain the service in an anonymous way and hence user privacy is well protected. However, a tracing procedure can be invoked to find malicious users, thereby efficiently preventing users from abusing the anonymity provided by the system. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Location based services

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Extending CSP to detect motor imagery in a four-class BCI

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Journal of information and Computational science 2012年第1期9卷 143-151页

作者： Fang, Yonghui Chen, Minyou Zheng, Xufei Harrison, R.F. State Key Laboratory of Power Transmission Equipment and System Security New Technology Chongqing University Chongqing 400044 China School of Electronic and Information Engineering Southwest University Chongqing 400715 China College of Computer Science Sichuan University Chengdu 610065 China Department of Automatic Control and Systems Engineering University of Sheffield United Kingdom

Brain computer Interface (BCI) provides a direct communication channel from brain to peripheral equipment. Common Spatial Patterns (CSP) is wildly used to extract features for electroencephalogram (EEG). However, basic CSP only suits two-class discrimination and is unable to solve multi-class discrimination problems. This paper proposes a modified CSP method termed Bisearch Common Spatial Patterns (BCSP) to solve a four-class BCI problem. In BCSP, the Fisher's Linear Discriminant Analysis (LDA) is used to discriminate among the four motor imagery tasks. The BCSP can effectively reduce the number of the basic CSP, and thus makes the overall classification procedure more efficient. The Graz BCI data set from the BCI 2008 competition be used to verify the effectiveness of the BCSP. Simulation results show that BCSP has better performance than other extension schemes. © 2012 Binary information Press January 2012.

关键词： Brain computer interface

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Editorial

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International Journal on Artificial Intelligence Tools 2012年第3期21卷

作者： Cui, Zhihua Shi, Zhongzhi Alex, Rajan Complex System and Computational Intelligence Laboratory School of Computer Science and Technology Taiyuan University of Science and Technology Shanxi 030024 China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences No. 6 Kexueyuan South Road Zhongguancun Haidian District Beijing 100190 China Department of Engineering and Computer Science West Texas AandM University Canyon TX 79015 United States

Swarm intelligence is an umbrella for amount optimization algorithms. This discipline deals with natural and artificial systems composed of many individuals that coordinate their activities using decentralized control and self-organization. In general, multi-agent systems that use some swarm intelligence are said to be swarm intelligent systems. They are mostly used as search engines and optimization tools. The goal of this special issue has been to offer a wide spectrum of sample works throughout the world about innovative methodologies of swarm intelligence. The issue should be useful both for beginners and experienced researchers in the field of computational intelligence. © 2012 World Scientific Publishing Company.

关键词： Swarm intelligence

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security analysis of two recently proposed RFID authentication protocols

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中国计算机科学前沿 2011年第3期5卷 335-340页

作者： Chao LV Hui LI Jianfeng MA Meng ZHAO Key Laboratory of Computer Networks and Information Security Xidian University Xi'an 710071 China Department of Computer Science and Technology Yanshan University Qinhuangdao 066004 China

Radio frequency identification (RFID) systems suffer many security risks because they use an insecure wireless communication channel between tag and *** this paper,we analyze two recently proposed RFID authentication *** protocols are vulnerable to tag information leakage and untraceability *** the attack on the first protocol,the adversary only needs to eavesdrop on the messages between reader and tag,and then perform an XOR *** attack the second protocol successfully,the adversary may execute a series of carefully designed challenges to determine the tag's identification.

关键词： radio frequency identification (RFID) protocol tag information leakage untraceability attack

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Identity-based proxy cryptosystems with revocability and hierarchical confidentialities

Identity-based proxy cryptosystems with revocability and hie...

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作者： Wang, Lihua Wang, Licheng Mambo, Masahiro Okamoto, Eiji Network Security Research Institute Koganei-shi 184-8795 Japan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Faculty of Electrical and Computer Engineering Institute of Science and Engineering Kanazawa University Kanazawa-shi 920-1192 Japan School of Systems and Information Engineering University of Tsukuba Tsukuba-shi 305-8573 Japan

Proxy cryptosystems are classified into proxy decryption systems and proxy re-encryption systems on the basis of a proxy's role. In this paper, we propose an ID-based proxy cryptosystem with revocability and hierarchical confidentialities. In our scheme, on receiving a ciphertext, the proxy has the rights to perform the following three tasks according to the message confidentiality levels of the sender's intention: (1) to decrypt the ciphertext on behalf of the original decryptor;(2) to re-encrypt the ciphertext such that another user who is designated by the original decryptor can learn the message;(3) to do nothing except for forwarding the ciphertext to the original decryptor. Our scheme supports revocability in the sense that it allows proxy's decryption and re-encryption rights to be revoked even during the valid period of the proxy key without changing the original decryptor's public information. We prove that our proposal is indistinguishable against chosen identity and plaintext attacks in the standard model. We also show how to convert it into a system against chosen identity and ciphertext attacks by using the Fujisaki-Okamoto transformation. © 2012 The Institute of Electronics, information and Communication Engineers.

关键词： Cryptography

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Feature extraction of motor imagery in BCI with approximate entropy

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Journal of Computational information systems 2012年第6期8卷 2485-2491页

作者： Fang, Yonghui Chen, Minyou Zheng, Xufei Harrison, Robert F State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 China School of Electronic and Information Engineering Southwest University Chongqing 400715 China College of Computer Science Sichuan University Chengdu 610065 China Department of Automatic Control and Systems Engineering University of Sheffield Sheffield United Kingdom

Approximate Entropy (ApEn) is a regularity statistic that quantifies the unpredictability of fluctuations in a time series and can classify complex systems. This study, ApEn is used to extract features from motor imagery Electroencephalogram (EEC) that containing two motor imagery tasks. This method is different from the traditional way to get the character from EEC. Appropriate parameters must been chosen for different dataset. Two datasets are used in this paper. One comes from BCI Competion2003, the other from the lab of Electromagnetic theory and artincal intelligence, Chongqing University. The results show that ApEn can extract different features in left-hand and right-hand motor imagery EEC efficiently. Comparison between ApEn and Fast Fourier Transform (FFT) shows that ApEn has good capability to the two imagery tasks Brain computer Interface. © 2012 Binary information Press.

关键词： Electroencephalography

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SmartMote: Energy and VoI aware solar-powered sensor network design for environment monitoring

SmartMote: Energy and VoI aware solar-powered sensor network...

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IEEE Internatonal Conference on Mobile Adhoc and Sensor systems (MASS)

作者： Shao-Jie Tang Cheng Bo Xiang-Yang Li Yunhao Li Xiaohua Xu Jing Yuan Department of Computer Science Illinois Institute of Technology USA The Key Laboratory of Embedded System and Service Computing Tongji University China Tsinghua University Beijing Beijing CN Department of Computer Science University of Illinois at Chicago USA

Due to advances in low power micro-sensor technology, energy harvesting techniques, we can now build large scale solar-powered sensor networks to support long-running operations. Solar powered sensors often harvest variable amounts of energy in different weather conditions. Then a primary requirement for an efficient and a long-running solar-powered sensor system is to adapt to changing environment conditions and resources, and to gather as much valuable data as possible. Sensing and collecting data at a constant rate, without taking into account energy availability or data deliverability, will either drain the battery or waste resources. In this work, we design and test a highly efficient and robust solar-powered system SmartMote; and we further present an energy and value of information (VoI) aware routing strategy, that balances the rates of sensing with packet delivery for SmartMote. SmartMote achieves fairness and near maximum utility across the network. We deploy SmartMote in a forest with 100 sensors in order to monitor the humidity, temperature and luminance intensity. Our experimental results corroborate our design.

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An arterial elasticity index algorithm based on wavelet transform and curve fitting

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Journal of information and Computational science 2012年第12期9卷 3379-3389页

作者： He, Wei Li, Songnong Xiao, Hanguang Yu, Chuanxiang Lin, Haitao State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400030 China Product Research and Development Department Sichuan Yufeng Science and Technology Development Co. Ltd. Mianyang 621000 China

The Artery Elasticity Index (AEI) is an important marker in the evaluation of the risk level of cardiovascular and cerebrovascular diseases. For calculating AEI, signals of arterial pulse wave should be acquired first. However, traditional difference threshold algorithm is not fit to detect non-stationary signals. This paper, setting Haar function as mother wavelet of continuous wavelet transform and combining with L-M curve fitting, proposes an improved AEI algorithm. In this algorithm, on the basis of improved arterial Windkessel model, the optimum waveform is chosen by applying wavelet detection to pulse wave of radial artery;then, the model parameters are obtained by L-M curve fitting;finally, the AEI is calculated. We realized the algorithm by LabVIEW programming and developed an Arteriosclerosis Detecting Instrument (ADI). We also carried out a clinical experiment according to age groups within 198 healthy people. The results of clinical experiment show that proposed algorithm and ADI are effective. © 2012 Binary information Press.

关键词： Elasticity

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