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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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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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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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A SIMPLE FULLY HOMOMORPHIC ENCRYPTION SCHEME AVAILABLE IN CLOUD COMPUTING

A SIMPLE FULLY HOMOMORPHIC ENCRYPTION SCHEME AVAILABLE IN CL...

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

作者： Jian Li Danjie Song Sicong Chen Xiaofeng Lu 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

With continuous expansion of cloud computing, problems of third-party data security become increasingly prominent. However, effective retrieval of encrypted data and other operations are difficult to achieve by traditional cryptogram systems. Thus, a practical simple fully homomorphic encryption scheme, using only elementary modular arithmetic, derived from Gentry cryptosystem is put forward to ensure the privacy-preserving in cloud storage, in which encrypted data can be operated directly without affecting the confidentiality of the encryption systems, so that it can excellently realize the need of cipertext retrieval and other processing in untrusted servers. Compared with the previous protocols Marten van Dijk et al. proposed at Advances in Cryptology-EUROCRYPT 2010 and Craig Gentry proposed in the March 2010 issue of Communications of the ACM, especially in the aspect of cipertext retrieval, the proposed scheme is much more secure and feasible. And the performance evaluation and security analysis demonstrate the practice and validity of the proposed scheme.

关键词： Cloud computing fully homomorphic encryption Ciphertext retrieval data security

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Alliance-Authentication Protocol in Clouds Computing Environment

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China Communications 2012年第7期9卷 42-54页

作者： Zhang Qikun Li Yuanzhang Song Danjie Tan Yuan School of Computer Science and Technology Beijing Institute of Technology Beijing 100081 P. R. China Network and Data Security Key Laboratory of Sichuan Province University of Electronic Science and Technology ofChina Chengdu 610054 P. R. China School of Computer Beijing University of Posts and Telecommunications Beijing 100876 P. R. China

Security has been regarded as one of the hardest problems in the development of cloud computing. This paper proposes an AllianceAuthentication protocol among Hybrid Clouds that include multiple private clouds and/or public clouds. Mu tual authentication protocol among entities in the IntraCloud and InterCloud is proposed. Blind signature and bilinear mapping of automorphism groups are adopted to achieve the InterCloud Alli anceAuthentication, which overcome the complexi ty of certificate transmission and the problem of communication bottlenecks that happen in tradi tional certificatebased scheme. Blind key, instead of private key, is adopted for register, which avoids

关键词： Alliance-Authentication direct product decomposition bilinear mapping cloud computing

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Pattern mining, semantic label identification and movement prediction using mobile phone data

Pattern mining, semantic label identification and movement p...

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8th International Conference on Advanced data Mining and Applications, ADMA 2012

作者： Xie, Rong Luo, Jun Yue, Yang Li, Qingquan Zou, Xiaoqing International School of Software Wuhan University Wuhan 430079 China Shenzhen Institutes of Advanced Technology CAS Shenzhen 518055 China Shenzhen Key Laboratory of High Performance Data Mining Shenzhen 518055 China Shenzhen University Shenzhen China State Key Lab. of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming China

ISBN: (纸本)9783642355264

data collected from mobile phones have potential knowledge to provide with important behavior patterns of individuals. In this paper, we present approaches to discovering personal mobility and characteristics based on mobile phone location information and semantic analysis. We discuss three aspects related to very common mobile phone-related applications such as pattern mining, semantic label identification and movement prediction. We use real mobile phone data to perform functions of discovering these behavior patterns and demonstrate effectiveness of our approaches. © Springer-Verlag 2012.

关键词： Cellular telephones

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Overhead Power Line Detection from UAV Video Images

Overhead Power Line Detection from UAV Video Images

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International Conference on Mechatronics and Machine Vision in Practice

作者： Tang Wen YANG Hang YIN Qiu Qi RUAN Jian Da HAN Jun Tong QI Qing YONG Zi Tong WANG Zeng Qi SUN Beijing Key Laboratory of Advanced Information Science and Network Technology Institute of Information Science Beijing Jiaotong University Beijing 100044 China Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing 100044 China State Key Laboratory of Robotics Shenyang Institute of Automation CAS Shenyang 110016 China Department of Computer Science and Technology Tsinghua University Beijing 100084 China

ISBN: (纸本)9781467316439

Currently, unmanned aerial vehicles (UAVs) are applied to routine inspection tasks of electric distribution networks. As an important information source, machine vision attracts much attention in the area of the UAV's autonomous control. To this end, real-time algorithms are studied-in this paper to detect the power lines in the UAV video images. First, video images are converted into binary images through an adaptive thresholding approach. Then, Hough Transform is used to detect line candidates in the binary images. Finally, a fuzzy C- means (FCM) clustering algorithm is used to discriminate the power lines from the detected line candidates. The properties of power lines are used to remove the spurious lines, and the length and slope of the detected lines are used as features to establish the clustering data set. Experimental results show that the algorithms proposed are effective and able to tolerate noises from complicated terrain background and various illuminations.

关键词： Hough transforms autonomous aerial vehicles computer vision fuzzy set theory pattern clustering power overhead lines power system control video signal processing

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miRDeathDB:a database bridging microRNAs and the programmed cell death

miRDeathDB:a database bridging microRNAs and the programmed ...

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第五届全国生物信息学与系统生物学学术大会暨国际生物信息学前沿研讨会高通量时代的生物信息学与系统生物学

作者： Jianzhen Xu Yan-Hui Li College of Bioengineering Henan University of TechnologyZhengzhouChina 450001 Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences Ministry of EducationPeking University Health Science Center Scientific Data Center Computer Network Information CenterChinese Academy of Sciences

Background:MicroRNAs(miRNAs) are a class of small non-coding RNAs,which negatively regulate protein coding genes at the posttranscriptional *** tiny regulators have been associated to almost all known physiological and pathological *** defects in miRNAs have been implicated in the etiology of many forms of human diseases. Apoptosis,autophagy and programmed necrosis are three distinct yet intimately connected functional modules of programmed cell death(PCD).In the past few years,increasing evidences suggested that aberrant expression of miRNAs regulate different subroutines of *** the roles of miRNAs in PCD network has attracted interests of researchers from a wide range of ***,a knowledge depository,which integrates information for both miRNAs and their targets in PCD network,will be of great help. Methods:Based on PubMed search,we firstly collected literatures which reported the roles of miRNAs in PCD before April ***,these literatures were inspected manually and the miRNAs and their targets genes were *** criterion for selecting PCD associated miRNAs in miRDeathDB is *** morphological or biochemical data should be provided when the miRNAs(or their targets) are manipulated in cell death *** miRDeathDB(http://***/mirdeathdb/) was developed,which allows users to browse,search and analyze the PCD associated miRNAs. Results:In total,210 records covering 86 miRNAs and 95 protein coding genes were collected in five model species:humans(Homo sapiens),mice(Mus musculus),fruit flies (Drosophila melanogaster),rat(Rattus norvegicus) and African frog(Xenopus tropicalis). Users can search the database for both miRNAs and protein coding entries based on principal *** addition,users can browse and obtain full lists of miRNAs involved in PCD for any given *** data can be freely downloaded or accessed via our website for academic uses. Conclusions:miRDeathDB provides a valuab

关键词： microRNAs apoptosis autophagy necrosis

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miRDeathDB: a database bridging microRNAs and the programmed cell death

miRDeathDB: a database bridging microRNAs and the programmed...

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第五届全国生物信息学与系统生物学学术大会

作者： Jianzhen Xu Yan-Hui Li College of Bioengineering Henan University of Technology Zhengzhou China 450001 Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences Ministry of Education Peking University Health Science Center 38 Xueyuan Road Haidian District Beijing China 100191 Scientific Data Center Computer Network Information Center Chinese Academy of SciencesBeijing China 100190

Background: MicroRNAs (miRNAs) are a class of small non-coding RNAs, which negatively regulate protein coding genes at the posttranscriptional *** tiny regulators have been associated to almost all known physiological and pathological *** defects in miRNAs have been implicated in the etiology of many forms of human ***, autophagy and programmed necrosis are three distinct yet intimately connected functional modules of programmed cell death (PCD).In the past few years, increasing evidences suggested that aberrant expression of miRNAs regulate different subroutines of *** the roles of miRNAs in PCD network has attracted interests of researchers from a wide range of ***, a knowledge depository, which integrates information for both miRNAs and their targets in PCD network, will be of great ***: Based on PubMed search, we firstly collected literatures which reported the roles of miRNAs in PCD before April ***, these literatures were inspected manually and the miRNAs and their targets genes were *** criterion for selecting PCD associated miRNAs in miRDeathDB is *** morphological or biochemical data should be provided when the miRNAs (or their targets) are manipulated in cell death *** miRDeathDB (http://***/mirdeathdb/) was developed, which allows users to browse, search and analyze the PCD associated ***: In total, 210 records covering 86 miRNAs and 95 protein coding genes were collected in five model species: humans (Homo sapiens), mice (Mus musculus), fruit flies (Drosophila melanogaster), rat (Rattus norvegicus) and African frog (Xenopus tropicalis).Users can search the database for both miRNAs and protein coding entries based on principal *** addition, users can browse and obtain full lists of miRNAs involved in PCD for any given *** data can be freely downloaded or accessed via our website for academic ***: miRDe

关键词： microRNAs apoptosis autophagy necrosis

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Improved deduplication method based on variable-size sliding window

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content technology and its Applications 2011年第9期5卷 80-87页

作者： Wang, Can Qin, Zhiguang Yang, Lei Nie, Peng 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

To improve the deduplication performance while keep a reasonable metadata cost and time cost at the same time, a state deduplication method based on variable-size sliding window and a universal model of performance-analyzing for the deduplication methods are proposed. According to this method, the data object is divided into non-overlapped mini chunks based on its content firstly, and then a variable-size sliding window, which uses the mini chunks as its basic unit of movement, is used to identify the duplicate data blocks. Further more, different chunking strategies are used on the data changing regions and the non-changing regions respectively. The theoretical analyzing indicates that this method can achieve satisfying deduplication performance even with a relatively larger expected chunk size, because it can reduce the metadata cost effectively and identify smaller duplicate data blocks. The experimental results on real data show that the average compression ratio of the method can be increased 13.02% than SWC, which has the optimal deduplication performance among the current deduplication methods. Moreover, the average time cost of this method is reduced 97.45% than SWC. This method is suitable for the applications of mass data backup in network environment, which have more rigorous requirements on the deduplication performance and the time cost.

关键词： Metadata

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