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International Symposium on information Processing in Sensor Networks (IPSN)

作者： Yin Wang Gaofeng Pan Zhiyu Huang MOE Key Lab for Information System Security TNLIST Tsinghua University Science and technology on communication information security control laboratory Chinese Academy of Sciences

ISBN: (纸本)9781479964703

Multi-hop time synchronization in wireless sensor networks (WSNs) is often time-consuming and error-prone due to random time-stamp delays for MAC layer access and unstable clocks of intermediate nodes. Constructive interference (CI), a recently discovered physical layer phenomenon, allows multiple nodes transmit and forward an identical packet simultaneously. By leveraging CI, we propose direct multihop (DMH) time synchronization by directly utilizing the time-stamps from the sink node instead of intermediate n-odes, which avoids the error caused by the unstable clock of intermediate nodes. DMH doesn't need decode the flooding time synchronization beacons. Moreover, DMH explores the linear regression technique in CI based time synchronization to counterbalance the clock drifts due to clock skews.

关键词： Synchronization Clocks Protocols Accuracy Interference Wireless sensor networks Relays

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System of the mine gas detection and location based on WSN technology

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2nd World Congress on Computer Science and information Engineering, CSIE 2011

作者： Sun, Yingchun Fan, Jianying Xu, Jiandong School of Measure-Control Technology and Communication Engineering Harbin University of Science and Technology Harbin Heilongjiang Province China Springer-Verlag Computer Science Editorial Tiergartenstr. 17 69121 Heidelberg Germany Higher Educ. Key Lab. for Measuring and Contr. Technol. and Instrum. of Heilongjiang Prov. Harbin University of Science and Technology Harbin Heilongjiang Province China Information and Electronic Technology Institute Jiamusi University Jiamusi Heilongjiang Province China

ISBN: (纸本)9783642257681

In order to resolve the detection problem of coal mine gas content detection, and ensure the personal safety under the ground, we design the gas content detection system which based on the technology of ZigBee. The system includes two functional models, which are ZigBee and gas sensor. We can control the system functional model by computer net, which can realize the radio transmit by use of ZigBee technology. It can real-time work, and the precise high, transmit far away. The system hardware is simple, operate easily, cost cheap, which can be used in coal mine and safety detection. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Gases

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The higher-order meet-in-the-middle attack and its application to the Camellia block cipher (extended abstract)

The higher-order meet-in-the-middle attack and its applicati...

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13th International Conference on Cryptology in India, INDOCRYPT 2012

作者： Lu, Jiqiang Wei, Yongzhuang Kim, Jongsung Pasalic, Enes Institute for Infocomm Research Agency for Science Technology and Research 1 Fusionopolis Way #19-01 Connexis Singapore 138632 Singapore Guilin University of Electronic Technology Guilin City Guangxi Province 541004 China State Key Lab. of Information Security Institute of Software Chinese Academy of Sciences Beijing 100190 China Department of E-Business Kyungnam University 449 Wolyoung-dong Masan Kyungnam Korea Republic of University of Primorska FAMNIT Koper Slovenia

ISBN: (纸本)9783642349300

The meet-in-the-middle (MitM) attack is a technique for analysing the security of a block cipher. In this paper, we propose an extension of the MitM attack, which we call the higher-order meet-in-the-middle (HO-MitM) attack;the core idea of the HO-MitM attack is to use multiple plaintexts to cancel some key-dependent component(s) or parameter(s) when constructing a basic unit of "value-in-the-middle". We introduce a novel approach, which combines integral cryptanalysis with the MitM attack, to construct HO-MitM attacks on 10-round Camellia under 128 key bits, 11-round Camellia under 192 key bits and 12-round Camellia under 256 key bits, all of which include FL/FL-1 functions. Finally, we apply an existing approach to construct HO-MitM attacks on 14-round Camellia without FL/FL-1 functions under 192 key bits and 16-round Camellia without FL/FL-1 functions under 256 key bits. © Springer-Verlag 2012.

关键词： security of data

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A New Method for Meet-in-the-Middle Attacks on Reduced AES

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China communications 2011年第2期8卷 21-25页

作者：董晓丽胡予濮韦永壮陈杰 Key Lab. of Computer Networks & Information Security Ministry of EducationXidian University School of Information and Communication Guilin University of Electronic Technology State Key Lab. of Information Security Institute of SoftwareChinese Academy of Sciences

A new 5-round distinguisher of AES with key whitening is presented by using the properties of its round transformation. Based on this distinguisher,we present new meet-in-the-middle attacks on reduced AES considering the key schedule and the time-memory tradeoff approach. New attacks improve the best known meet-in-the-middle attacks on reduced AES presented at *** reduce the time complexity of attacks on 7-round AES-192 and 8-round AES-256 by a factor of at least 28. Moreover,the distinguisher can be exploited to develop the attack on 8-round AES-192.

关键词： AES Rijndael cryptanalysis meet-in-the-middle attack

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A new variable step size NLMS algorithm based on decorrelation for second-order Volterra filter

A new variable step size NLMS algorithm based on decorrelati...

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2011 International Conference on Automation and Robotics, ICAR 2011

作者： Zhao, Zhijin Yan, Pingping Shen, Lei Telecommunication School Hangzhou Dianzi University Zhejian 310018 China State Key Lab. of Information Control and Security Technology in Communication No. 36 Research Institute China Electronic Technology Corporation Jiaxing 314001 China

ISBN: (纸本)9783642255526

When the input signals are strongly correlated, the adaptive algorithm performance of Volterra filter deteriorates. Meanwhile, the correlativity of linear input signals of Volterra filter is different from that of nonlinear input signals of Volterra filter. So, a new variable step size NLMS algorithm based on decorrelation for second-order Volterra filter is proposed. In the new algorithm, the decorrelation is used in linear and nonlinear input signals of Volterra filter, respectively, and the different variable step factors are adopted. Simulation results of noise cancellation show that the correlativity of input noises has no fundamental impact on the proposed algorithm, whether it is strong or weak. And when the input noises are strongly correlated, the new algorithm still has a better noise cancellation performance. © 2011 Springer-Verlag.

关键词： Adaptive algorithms

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A fast sparsity adaptive matching pursuit algorithm for compressed sensing

A fast sparsity adaptive matching pursuit algorithm for comp...

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2011 International Conference on Automation and Robotics, ICAR 2011

作者： Ma, Chun-Hui Xu, Chun-Yun Shen, Lei Zheng, Shi-Lian Telecommunication School Hangzhou Dianzi University Zhejian 310018 China State Key Lab. of Information Control Technology in Communication System No.36 Research Institute Electronic Technology Corporation Jiaxing 314001 China

ISBN: (纸本)9783642255526

Sparsity adaptive matching pursuit algorithm (SAMP) is a compressed sensing signal reconstruction algorithm with good performance. However, as the support set expands one time, the backward pursuit should be processed for many times, in which redundant update calculations are included. To solve the problem, this paper presents a fast sparsity adaptive matching pursuit algorithm (FSAMP). During the operation of the FSAMP, the backward pursuit is performed only once when the support set expands. After the support set is fixed, the backward pursuit shall be executed for multi times to guarantee the reconstruction precision. Simulation results for signal reconstruction show that the FSAMP has the slight higher reconstruction precision and the much faster reconstruction speed compared with the SAMP. © 2011 Springer-Verlag.

关键词： Compressed sensing

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A New Variable Step Size NLMS Algorithm Based on Decorrelation for Second-Order Volterra Filter

A New Variable Step Size NLMS Algorithm Based on Decorrelati...

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The 2011 International Conference on Automation and Robotics(ICAR 2011)

作者： Zhijin Zhao Pingping Yan Lei Shen Telecommunication School Hangzhou Dianzi University State Key Lab of Information Control and Security Technology in Communication of No.36 Research Institute China Electronic Technology Corporation

关键词： second-order Volterra filter decorrelation normalized LMS noise cancellation

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Multi-user private keyword search for cloud computing

Multi-user private keyword search for cloud computing

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2011 3rd IEEE International Conference on Cloud Computing technology and Science, CloudCom 2011

作者： Yang, Yanjiang Lu, Haibing Weng, Jian Institute for Infocomm Research Singapore Singapore Dept. of Operations Management and Information Systems Leavey School of Business Santa Clara University United States Department of Computer Science Emergency Technology Research Center of Risk Evaluation and Prewarning on Public Network Security Jinan University Guangzhou China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences China State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications China

ISBN: (纸本)9780769546223

Enterprises outsourcing their databases to the cloud and authorizing multiple users for access represents a typical use scenario of cloud storage services. In such a case of database outsourcing, data encryption is a good approach enabling the data owner to retain its control over the outsourced data. Searchable encryption is a cryptographic primitive allowing for private keyword based search over the encrypted database. The above setting of enterprise outsourcing database to the cloud requires multi-user searchable encryption, whereas virtually all of the existing schemes consider the single-user setting. To bridge this gap, we are motivated to propose a practical multi-user searchable encryption scheme, which has a number of advantages over the known approaches. The associated model and security requirements are also formulated. We further discuss to extend our scheme in several ways so as to achieve different search capabilities. © 2011 IEEE.

关键词： Outsourcing

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A Fast Sparsity Adaptive Matching Pursuit Algorithm for Compressed Sensing

A Fast Sparsity Adaptive Matching Pursuit Algorithm for Comp...

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The 2011 International Conference on Automation and Robotics(ICAR 2011)

作者： Chun-hui Ma Chun-yun Xu Lei Shen Shi-lian Zheng Telecommunication School Hangzhou Dianzi University State Key Lab of Information Control Technology in Communication System of No.36 Research Institute China Electronic Technology Corporation

Sparsity adaptive matching pursuit algorithm(SAMP) is a compressed sensing signal reconstruction algorithm with good performance. However, as the support set expands one time, the backward pursuit should be processed for many times, in which redundant update calculations are included. To solve the problem, this paper presents a fast sparsity adaptive matching pursuit algorithm(FSAMP). During the operation of the FSAMP, the backward pursuit is performed only once when the support set expands. After the support set is fixed, the backward pursuit shall be executed for multi times to guarantee the reconstruction precision. Simulation results for signal reconstruction show that the FSAMP has the slight higher reconstruction precision and the much faster reconstruction speed compared with the SAMP.

关键词： compressed sensing subspace pursuit sparsity adaptive matching pursuit image processing

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TinyStream: A lightweight and novel stream cipher scheme for wireless sensor networks

TinyStream: A lightweight and novel stream cipher scheme for...

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International Conference on Computational Intelligence and security

作者： Chen, Tieming Ge, Liang Wang, Xiaohao Cai, Jiamei College of Computer Sci. and Tech. Zhejiang University of Technology Hangzhou 310023 China State Key Lab. of Software Development Environment Beihang University Beijing 100191 China Zhejiang Key Laboratory of Information Security Hangzhou 310012 China College of Computer Sci. and Tech. Zhejiang University of Technology Hangzhou 310012 China

ISBN: (纸本)9780769542973

Implementation performance and key randomness are two key issues for stream cipher systems. In this paper, a lightweight stream cipher with good randomness of key stream is firstly proposed. It utilizes a novel proposed model named tree parity machine to generate streams. The most superiority of our scheme is that 128 bits could be generated based on one time of state rotation, and it passes the full ENT randomness test. Then, implementation of the proposed scheme for wireless sensor networks, TinyStream, is presented. TinyStream is based on TinySec protocols, and just costs 65024 bytes ROM and 1659184 bytes RAM with a subtle rather than that of TinySec. Due to the simple structure and small computation, TinyStream is considered to be good for secure communication applications in the resource constraint WSNs. © 2010 IEEE.

关键词： Wireless sensor networks

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