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Attribute-Based Authenticated Group key Management Protocol for Mobile Peer-to-Peer network

China Communications 2012年第10期9卷 68-77页

作者： Zhang Guoyin Fu Xiaojing Ma Chunguang College of Computer Science and Technology Harbin Engineering University Harbin 150001 P. R. China Network and Data Security Key Laboratory of Sichuan Province University of Electronic Science and Technology of China Chengdu 611731 P. R. China

The authentication and privacy of a group member is important in multicast communication. This paper proposes a privacy-preserving authenticated group-key management protocol for the Mobile Peer-to-Peer network （ MP2PN ）. The MP2PN contains some super peers and each super peer controls a subgroup composed of regular peers. An efficient attribute-based signature based on Cipertext-Policy Attribute-Based Encryption （CP-ABE） is proposed and used in this group-key rmnagement protocol to authenticate a peer＇s at- tributes and identity. A peer can be described by a set of attributes or one unique special identity at- tribute. Peers that have some attributes in common can form a group and conmmnicate with each other anonymously and securely. Any super peer can initiate a group and act as a group controller. The group controller can authenticate a peer＇s attributes and identity as well as remove malicious peers. Any peer with attributes that rmtches the access structure can join the group and provide its input to form the group key. The proposed protocol pro- vides backward and forward secrecy. The sinmlation results show that this protocol is applicable for mobile devices and can meet the MP2PN requirements of group communication.

关键词： MP2PN group key tmnagement attribute-based signature anonymous conmmnica tion

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A genetic clustering algorithm using a message-based similarity measure

A genetic clustering algorithm using a message-based similar...

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作者： Chang, Dongxia Zhao, Yao Zheng, Changwen Zhang, Xianda Institute of Information Science Beijing Jiaotong University Beijing Key Laboratory of Advanced Information Science and Network Technology Beijing 100044 China National Key Lab of Integrated Information System Technology Institute of Software Chinese Academy of Sciences Beijing 100080 China Tsinghua Department of Automation Tsinghua University Beijing 100084 China

In this paper, a genetic clustering algorithm is described that uses a new similarity measure based message passing between data points and the candidate centers described by the chromosome. In the new algorithm, a variable-length real-value chromosome representation and a set of problem-specific evolutionary operators are used. Therefore, the proposed GA with message-based similarity (GAMS) clustering algorithm is able to automatically evolve and find the optimal number of clusters as well as proper clusters of the data set. Effectiveness of GAMS clustering algorithm is demonstrated for both artificial and real-life data set. Experiment results demonstrated that the GAMS clustering algorithm has high performance, effectiveness and flexibility. © 2011 Elsevier Ltd. All rights reserved.

关键词： Clustering algorithms

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Study on sensor for solution concentration and temperature based on fused tapering optical fiber coupler

Study on sensor for solution concentration and temperature b...

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2012 International Symposium on Photonics and Optoelectronics, SOPO 2012

作者： Lv, Min Ren, Guobin Yang, Xiaoyu Ding, Jianbo Wang, Wenzhong College of Science Minzu University of China Beijing 100081 China Key Lab. of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9781457709111

A simple and high-degree accuracy sensor for solution concentration and temperature based on fused tapering optical fiber coupler is fabricated. The change of refractive index in the evanescent field on the fused region of an optical fiber coupler shifts the output coupling visibility. Therefore the coupling visibility is changed with variation of solution concentration (refractive index) and temperature surrounding the fused tapering zone of the coupler. The sodium chloride solution is studied experimentally. Based on the experiment data and the least square method, the concentration accuracy of the coupler sensor is evaluated to be 10e-3 and the temperature accuracy is about 0.823°C. The stability of the sensor system with the optical coupler can reach the order of 10e-4. This simple, low-cost, good-stability and high-degree accuracy coupler sensor is suitable to be used in the environmental monitoring, analytical chemistry, and food safety testing. © 2012 IEEE.

关键词： Refractive index

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High-definition image processing algorithm and digital platform design

High-definition image processing algorithm and digital platf...

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2012 IEEE 12th International Conference on Computer and Information technology, CIT 2012

作者： Ao, Qian Chen, Rongguan Ning, Ning Sun, Guozhi Zhang, Xiaochen Zheng, Jie Kong, Deyu Computer Network Center Shangrao Normal University Shangrao Jiangxi China State Key Lab. of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu Sichuan China

ISBN: (纸本)9780769548586

The issue designs a high-definition digital processing platform, present algorithms of image sensor decoding and image enhancement pre-processing and its implementation. Firstly, the framework of the high-definition digital processing platform is introduced. Then the image sensor decode algorithm is given in detail. Finally the paper introduces the framework of the pre-processing algorithm. The major function block of the pre-processing algorithm is discussed in detail, including image filtering, image sharpening, gamma correction, white balance. Experiment results prove that the proposed method improves the image quality captured by CMOS sensor effectively. © 2012 IEEE.

关键词： Image sensors

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Distributed redundancy strategy in P2P environment

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content technology and its Applications 2012年第3期6卷 148-157页

作者： Yang, Lei Qin, Zhi-Guang Wang, Can Yang, Hao School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China Network and Data Security Key Laboratory of Sichuan Province Chengdu 611731 China

P2P storage architecture plays an important role in distributed storage systems. For P2P dynamic environment, the sufficient redundant data must be maintained to ensure the data availability. System will pay various costs to maintain redundant data. In this paper, the costs of the bandwidth that are respectively caused by the methods of replication and erasure coding are qualitatively analyzed based on Markov chain model. Combined the advantage of replication and erasure coding, a new hybrid redundancy strategy is proposed. Just as replication, the downloaded files automatically are viewed as shared files for next downloading. Like erasure coding, when the availability of one file needs to be repaired, anyone of peers which store the fully copy of this file is assigned to generate and distribute new fragments. The analysis result shows that the hybrid redundancy strategy can maintain the appropriate level of redundancy and save more bandwidth than the traditional redundancy strategy in a variety of network environment.

关键词： Redundancy

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A load-balanced data aggregation scheduling for duty-cycled wireless sensor networks

A load-balanced data aggregation scheduling for duty-cycled ...

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2012 4th IEEE International Conference on Cloud Computing technology and science, CloudCom 2012

作者： Chen, Zhengyu Yang, Geng Chen, Lei Xu, Jian Wang, Haiyong Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education Nanjing University of Posts AndTelecommunications Nanjing 210046 China College of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210046 China School of Information Technology Jinling Institute of Technology Nanjing 211169 China

ISBN: (纸本)9781467345095

To bridge the gap between limited energy supplies of the sensor nodes and the system lifetime, duty-cycle Wireless Sensor networks (WSNs) with data aggregation are studied in this paper. We proposed a load-balanced and latency-efficient data aggregation scheduling for duty-cycled WSNs. A shortest path tree (SPT) is used as the routing structure for data aggregation scheduling. In SPT, parent-children assignments are well-designed to assign nodes from level h+1 to the parents at level h such that every parent has a balanced load, while reducing the sleep latency which is a period of time for a sender to wait for its parent to be active. Finally, through the simulation and comparisons, we prove the effectiveness of our approach. © 2012 IEEE.

关键词： Scheduling

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Information encryption based on virtual optical imaging system and Chen's chaos

Information encryption based on virtual optical imaging syst...

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2012 International Conference on Web Information Systems and Mining, WISM 2012

作者： Zhu, Wei Yang, Geng Xu, Jian Yang, Xiao-Ling College of Science Nanjing University of Posts and Telecommunications Nanjing 210003 Jiangsu China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 Jiangsu China

ISBN: (纸本)9783642334689

A new scheme of information encryption is presented in this paper, which employs Chen's chaos to construct the random mask of the virtual optical imaging system instead of randomly generated by computer. The generation of random mask, the procedures of encryption and decryption are described in detail. Numerical simulations prove that the constructed random mask is uniformly distributed and the encryption algorithm is effective. The experimental results also demonstrate that the proposed encryption algorithm has advantages of large key space and high key sensitivities. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Imaging systems

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The Double-System Architecture for Trusted OS

The Double-System Architecture for Trusted OS

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2012 International Conference on Solid State Devices and Materials science(SSDMS 2012)

作者： Yong Zhao Yu Li Jing Zhan College of Computer Science and Technology Beijing University of Technology Key Lab of Information Network Security Ministry of Public Security

With the development of computer science and technology, current secure operating systems failed to respond to many new security challenges. Trusted operating system(TOS) is proposed to try to solve these problems. However, there are no mature, unified architectures for the TOS yet, since most of them cannot make clear of the relationship between security mechanism and the trusted mechanism. Therefore, this paper proposes a double-system architecture(DSA) for the TOS to solve the problem. The DSA is composed of the Trusted System(TS) and the Security System(SS). We constructed the TS by establishing a trusted environment and realized related SS. Furthermore, we proposed the Trusted Information Channel(TIC) to protect the information flow between TS and SS. In a word, the doublesystem architecture we proposed can provide reliable protection for the OS through the SS with the supports provided by the TS.

关键词： Double System Architecture Trusted Information Channel Trusted Operating System Trusted Computing

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The Double-System Architecture for Trusted OS

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Physics Procedia 2012年 25卷 2006-2013页

作者： Yong Zhao Yu Li Jing Zhan College of Computer Science and Technology Beijing University of Technology Beijing 100124 China Key Lab of Information Network Security Ministry of Public Security Shanghai 201204 China

With the development of computer science and technology, current secure operating systems failed to respond to many new security challenges. Trusted operating system (TOS) is proposed to try to solve these problems. However, there are no mature, unified architectures for the TOS yet, since most of them cannot make clear of the relationship between security mechanism and the trusted mechanism. Therefore, this paper proposes a double-system architecture (DSA) for the TOS to solve the problem. The DSA is composed of the Trusted System (TS) and the Security System (SS). We constructed the TS by establishing a trusted environment and realized related SS. Furthermore, we proposed the Trusted Information Channel (TIC) to protect the information flow between TS and SS. In a word, the double system architecture we proposed can provide reliable protection for the OS through the SS with the supports provided by the TS.

关键词： Double System Architecture Trusted Information Channel Trusted Operating System Trusted Computing

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SECURITY STRUCTURE OF CLOUD STORAGE BASED ON HOMOMORPHIC ENCRYPTION SCHEME

SECURITY STRUCTURE OF CLOUD STORAGE BASED ON HOMOMORPHIC ENC...

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2012 IEEE 2nd International Conference on Cloud Computing and Intelligence Systems

作者： Jian Li Sicong Chen Danjie Song School of Computer Beijing University of Posts and Telecommunications Network and Data Security Key Laboratory of Sichuan Province University of Electronic Science and Technology of China

According to the demerits of the traditional cloud storage that there exists superuser, encryption and decryption would take up many client’s sources, and the retrieval spends much time and is complex, the paper proposed a security structure of cloud storage based on homomorphic encryption scheme. The structure will reduce the use of client’s sources, and is convenient for moving to mobile devices;the homomorphic encryption scheme makes retrieval more efficient;users’ data would be more secure because they could not be achieved by superusers in the side of sever;users can operate cloud virtual disk as convenient as local disk. These merits of the structure not only could ensure the data storage’s security, but also promote highly the popularization of cloud storage.

关键词： Cloud storage Storage security Homomorphic encryption

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