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International Conference on E-Business and Information system Security, EBISS

作者： Runhua Shi Hong Zhong Key Laboratory of Intelligent Computing & Signal Processing Anhui University Ministry of Education Hefei China School of Computer Science and Technology Anhui University Hefei China

This paper proposed a threshold RSA signature with traceable signers. In such scheme, there is a trusted center (TC), which generates all system parameters, the secret keys and the corresponding public keys of the group and all members, and exists a designated clerk, which creates a warrant recording the identities of the signers and other import information. Any t members can collaboratively generate the group signature with the help of the clerk, who verifies the validity of the partial signatures and combines them to the group signature. Any one can verify the correctness of the group signature by the public information and trace out to find the identities of the signers by the warrant.

关键词： Public key Forgery Digital signatures Laboratories Signal processing Collaboration Cryptography computer science computer security Information security

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Solid texture synthesis using Position Histogram Matching

Solid texture synthesis using Position Histogram Matching

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IEEE International Conference on computer-Aided Design and computer Graphics

作者： Jiating Chen Bin Wang Department of Computer Science and Technology Tsinghua University Beijing China Ministry of Education Key Laboratory of Information System Security Beijing China School of Software Tsinghua University Beijing China Tsinghua National Laboratory for Information Science and Technology Beijing China

In the past, several approaches have been proposed to produce high quality solid textures. Unfortunately, they often suffer from several synthesis artifacts, such as color blurry, bad texture structures, introducing aberrant voxel colors and so on. In this paper, we present a novel algorithm for synthesizing high quality solid textures from 2D exemplars. We adopt an optimization framework with the k-coherence search and the discrete solver for solid texture synthesis. The texture optimization approach is integrated with a new kind of histogram matching, position histogram matching, which effectively causes the global statistics of the synthesized solid textures to match those of the exemplars. Experimental results show that our synthesized results do not suffer from color blurry, and most texture structures are preserved well, outperforming the previous solid texture synthesis algorithms in terms of the synthesis quality.

关键词： Histograms Solid modeling Surface texture Educational technology Laboratories Principal component analysis Software quality computer science Information systems computer security

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Single vs. population cell coding: Gaze movement control in target search

Single vs. population cell coding: Gaze movement control in ...

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International Joint Conference on Neural Networks (IJCNN)

作者： Jun Miao Laiyun Qing Lijuan Duan Baixian Zou Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy and Sciences Beijing China School of Information Science and Engineering Chinese Academy of Sciences Beijing China College of Computer Science and Technology University of Technology Beijing China Department of Information Science and Technology College of Art and Science Beijing Union Technology Beijing China

Gaze movement plays an important role in human visual search system. In literature, the winner-take-all method is wildly used to simulate the controlling of the gaze movement. The winner-take-all is a type of single-cell coding method, which uses one cell (grandmother cell) or one response to represent an object. However, eye movement is affected by the visual context which includes more than one object in images, especially in target search. Therefore, we propose to use the population coding with more than one response rather than the single-cell coding on gaze movement control. The proposed method is supported by the theoretical analysis and experiments on a real image database which show the population-cell-coding improves the target locating accuracy by 44.4% only at the cost of coding 22.4% more information than that of single-cell-coding.

关键词： Humans Image coding Image databases Costs Information science Educational institutions Biological neural networks Control systems Image analysis Information analysis

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ARRAY: A Non-application-Related, Secure, Wide-Area Disaster Recovery Storage system

ARRAY: A Non-application-Related, Secure, Wide-Area Disaster...

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International Symposium on Parallel and Distributed Processing with Applications, ISPA

作者： Lingfang Zeng Dan Feng Bharadwaj Veeravalli Qingsong Wei Division of Data Storage System Wuhan National Laboratory for Optoelectronics Key Laboratory of Information Storage Ministry of Education School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China Department of Electrical and Computer Engineering National University of Singapore Singapore Data Storage Institute Singapore

With our society more information-driven, we have begun to distribute data in wide-area storage systems. At the same time, both physical failure and logic error have made it difficult to bring the necessary recovery to bear on remote data disaster, and understanding this proceeding. We describe ARRAY, a system architecture for data disaster recovery that combines reliability, storage space, and security to improve performance for data recovery applications. The paper presents an exhaustive analysis of the design space of ARRAY systems, focusing on the trade-offs between reliability, storage space, security, and performance that ARRAY must make. We present RSRAII (Replication-based Snapshot Redundant Array of Independent Imagefiles) which is a configurable RAID-like data erasure-coding, and also others benefits come from consolidation both erasure-coding and replication strategies. A novel algorithm is proposed to improve snapshot performance referred to as SMPDP (Snapshot based on Multi-Parallel Degree Pipeline).

关键词： Secure storage Network servers Bandwidth Redundancy Data security Cities and towns Laboratories Educational technology Hardware History

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DFTT4CWS: A Testing Tool for Composite Web services Based on Data-Flow

DFTT4CWS: A Testing Tool for Composite Web Services Based on...

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Web Information systems and Applications Conference (WISA)

作者： Jun Hou Lei Xu School of Computer Science and Engineering South-East University Nanjing China China Telecom Jiangsu Hongxin System Integration Company Limited Nanjing China State Key Laboratory for Novel Software Technology Department of Computer Science and Technology Nanjing University Nanjing China

For large and complex composite Web services which are composed by BPEL and a set of WSDL and XSD documents, we urgently need the aid of the tools in designing and selecting test cases. However, most of mature testing tools which generate test data with the information of WSDL are used for single service while the research for composition remains in the realm of theory. So we apply the theory of data-flow testing and try to develop a testing tool for Web services composition which can automatically detects harmful data-flow anomalies and generate test paths according to all kinds of data flow coverage criteria.

关键词： Web services Automatic testing Application software system testing computer science Sequential analysis Information systems Data engineering Design engineering Telecommunications

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Design of a flip-flop circuit within digital logic analyzer based on FPGA

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Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of technology 2009年第SUPPL. 1期41卷 58-62页

作者： Xiao, Ling-Li Xu, Ning Han, Yin-He School of Computer Science and Technology Wuhan University Of Technology Wuhan 430070 China System Architecture Key Laboratory Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

With the wide application of EDA technique, the period for the development of electronic products has been shortened. That implements the software of the hardware design and reduces the costs. Based on the analysis of the principle of digital logic analyzer circuit, this paper discusses the working principles of its flip-flop circuit module and the implementation method of FPGA, and presents the program design and emulation result of part circuits.

关键词： Field programmable gate arrays (FPGA)

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Learning long term face aging patterns from partially dense aging databases

Learning long term face aging patterns from partially dense ...

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International Conference on computer Vision (ICCV)

作者： Jinli Suo Xilin Chen Shiguang Shan Wen Gao Key Laboratory of Intelligent Information Processing of CAS Institute for Computing Technology Beijing China Chinese Academy and Sciences China School of Electronic Engineering and Computer Science Peking University China

Studies on face aging are handicapped by lack of long term dense aging sequences for model training. To handle this problem, we propose a new face aging model, which learns long term face aging patterns from partially dense aging databases. The learning strategy is based on two assumptions: (i) short term face aging pattern is relatively simple and is possible to be learned from currently available databases; (ii) long term face aging is a continuous and smooth Markov process. Adopting a compositional face representation, our aging algorithm learns a function-based short term aging model from real aging sequences to infer facial parameters within a short age span. Based on the predefined smoothness criteria between two overlapping short term aging patterns, we concatenate these learned short term aging patterns to build the long term aging patterns. Both the subjective assessment and objective evaluations of synthetic aging sequences validate the effectiveness of the proposed model.

关键词： Aging Databases Biological system modeling Prototypes Face detection Skin Content addressable storage computer vision Muscles Deformable models

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Differential Fault Analysis on SHACAL-1

Differential Fault Analysis on SHACAL-1

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Workshop on Fault Diagnosis and Tolerance in Cryptography (FDTC)

作者： Ruilin Li Chao Li Chunye Gong Department of Mathematics and System Science Science College National University of Defense Technology Changsha China State Key Laboratory of Information Security Institute of Software Chinese Academy and Sciences Beijing China School of Computer National University of Defense Technology Changsha China

ISBN: (纸本)9781424449729;9780769538242

SHACAL-1, known as one of the finalists of the NESSIE project, originates from the compression component of the widely used hash function SHA-1. The requirements of confusion and diffusion are implemented through mixing operations and rotations other than substitution and permutation, thus there exists little literature on its immunity against fault attacks. In this paper, we apply differential fault analysis on SHACAL-1 in a synthetic approach. We introduce the random word fault model, present some theoretical arguments, and give an efficient fault attack based on the characteristic of the cipher. Both theoretical predications and experimental results demonstrate that, 72 random faults are needed to obtain 512 bits key with successful probability more than 60%, while 120 random faults are enough to obtain 512 bits key with successful probability more than 99%.

关键词： Doped fiber amplifiers Public key cryptography Fault diagnosis Information analysis Chaos Mathematics Educational institutions Laboratories Information security Public key

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The Discovery of the Basic Terrain Features Based on Integration technology between GIS and Spatial Data Mining

The Discovery of the Basic Terrain Features Based on Integra...

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International Workshop on Intelligent systems and Applications, ISA

作者： Mei Zhong De-Jun Xu Qing-Yun Du Zhiwei Ye The Key Laboratory Geographic Information System Wuhan University Wuhan The Bureau of Land Resource of Linhai Linhai Zhejiang School of Resource and Environment Science Wuhan University Wuhan School of Computer Science Hubei University of Technology Wuhan China

The computer discovery technology of terrain features in topographic map is a new research project in the world. In this paper the author uses CD-TIN which is constructed on the basis of contour lines to discover and extract terrain features. The author uses improved convex algorithm to construct non-constrained D-TIN, and then puts forward impacted-region-diagonals-change local adjusting algorithm, and the new algorithm is used to embed contour lines into D-TIN as constrained segments and ultimately construct CD-TIN. We can discover flats and mountanious regions inside topographic map by means of computed normal vector and gradient. In the discovered mountanious regions, terrain features such as the neks, mountain peaks and valleys can be also discovered through the established CD-TIN's data structure and topology relationships.

关键词： Geographic Information systems Data mining Spatial databases Tin Feature extraction Data structures Topology Sampling methods Laboratories computer science education

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A threshold RSA signature scheme with traceable signers

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Journal of Computational Information systems 2009年第4期5卷 1143-1146页

作者： Shi, Runhua Zhong, Hong Huang, Liusheng Key Laboratory of Intelligent Computing and Signal Processing Anhui University Hefei 230039 China School of Computer Science and Technology Anhui University Hefei 230039 China NHPCC Depart. of CS. and Tech. USTC Hefei 230027 China

This paper proposes a threshold RSA signature scheme with traceable signers. In such scheme, there is a trusted center (TC), which generates all system parameters, the secret keys and the corresponding public keys of the group and all members, and exists a designated clerk, who creates a warrant recording the identities of the signers and other import information. Any t members can collaboratively generate the group signature with the help of the clerk, who verifies the validity of the partial signatures and combines them to the group signature. Any one can verify the correctness of the group signature by the public information and trace out to find the identities of the signers by the warrant. © 2009 Binary Information Press August, 2009.

关键词： Authentication

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