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Threshold undeniable RSA signature scheme 3rd

3rd International Conference on information and Communications security, ICICS 2001

作者： Wang, Guilin Qing, Sihan Wang, Mingsheng Zhou, Zhanfei Engineering Research Center for Information Security Technology State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing100080 China Mathematics Department College of Science and Technology Nihon University Tokyo101-8308 Japan

ISBN: (纸本)3540428801

Undeniable signature has been extensively researched after Chaum and Antwerpen first proposed the concept of this special digital signature ten years ago. Up to now, however, almost all the existed schemes are based on discrete logarithm cryptosystems. In this paper, based on an improvement of the practical threshold RSA signature scheme proposed by Shoup at Eurocrypt’2000 and the first undeniable RSA signature scheme proposed by Gennaro, Krawczyk and Rabin at Crypto’97, we present the first, as we know, threshold undeniable RSA signature scheme. Our scheme is secure and robust since all the partial signatures are verifiable by adopting a discrete logarithm equality protocol proposed by Shoup. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Cryptography

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Multisequence synthesis over an integral domain 1

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International Conference on Cryptography and Lattices, CaLC 2001

作者： Wang, Li-Ping Zhu, Yue-Fei State Key Laboratory of Information Security Graduate School University of Science and Technology of China Beijing100039 China Department of Network Engineering Information Engineering University Zhengzhou450002 China

ISBN: (数字)9783540446705

ISBN: (纸本)3540424881

We first give an extension of F[x]-lattice basis reduction algorithm to the polynomial ring R[x] where F is a field and R an arbitrary integral domain. So a new algorithm is presented for synthesizing minimum length linear recurrence (or minimal polynomials) for the given multiple sequences over R. Its computational complexity is O(N2) multiplications in R where N is the length of each sequence. A necessary and sufficient conditions for the uniqueness of minimal polynomials are given. The set of all minimal polynomials is also described. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Polynomials

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An Effective Method for Chinese Grammar Rule Learning

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International Journal of computer Processing of Languages 2001年第4期14卷 361-374页

作者： CHUNFA YUAN GANG CHEN K. F. WONG WENJIE LI State Key Laboratory of Intelligent Technology and System Department of Computer Science & Technology Tsinghua University Beijing 100084 China Department of System Engineering & Engineering Management The Chinese University of Hong Kong China

A new method of Chinese grammar rules learning is put forward in this paper. The key point of this method is to use part-of-speech (POS), semantic and contextual information together in learning and expressing Chinese grammar rules. In this way, not only Context Free Grammar (CFG) rules can be learnt, but also the ambiguous structures in POS can be identified automatically. Furthermore, non-ambiguous semantic rules and forbidden rules can be produced from ambiguous rules by using semantic and contextual information. Experimental results demonstrate that the complexity of Chinese parsing is greatly reduced using the different rules learnt by our method.

关键词： Chinese Parsing Semantic Rules Forbidden Rules Chinese Semantic Associated Net Chinese Grammar Rules

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Statistical learning and analyses of Chinese ancient books for information retrieval

Statistical learning and analyses of Chinese ancient books f...

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IEEE International Conference on systems, Man and Cybernetics

作者： Min Zhang Shao-Ping Ma Zhe Jiang Ke Huang State Key laboratory of Intelligent Technology and System Department of Computer Science and Technology Tsinghua University Beijing China

The technique of full text retrieval for modern Chinese has been studied for a long time, but the same cannot be said for ancient Chinese books, especially in China. This paper tries to find the characteristics of Chinese ancient books which can be used for information retrieval. Statistical analysis was carried out on ancient Chinese books of over 35,000,000 words, including most of the works in common use. Based on these experiments some characteristics of ancient Chinese works are analyzed and compared with modern Chinese, including the basic unit of ancient works, the proportion of double character words, sentence length, and the field dependency of ancient Chinese works. We then give conclusions on ancient Chinese which is useful for information retrieval, especially when building inverted indexes and selecting the index unit. Depending on the conclusion, a full-text retrieval system for ancient Chinese books has been designed and realized. It shows that statistical learning and analyses are a great help in ancient Chinese information retrieval.

关键词： Statistical learning information analysis Books information retrieval Modems Natural languages Statistical analysis Continents Frequency History

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A TV program generation system using digest video scenes and a scripting markup language

A TV program generation system using digest video scenes and...

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Annual Hawaii International Conference on system sciences (HICSS)

作者： Y. Shirota T. Hashimoto A. Nadamoto T. Hattori A. Iizawa K. Tanaka K. Sumiya Software Research Center Imaging System Business Group Ricoh Company Limited Japan Division of Information and Media Science Graduate School of Science and Technology Kobe University Japan Department of Computer and Systems Engineering Graduate School of Science and Technology Kobe University Japan Division of Urban Information Systems Research Center for Urban Safety and Security Kobe University Japan

ISBN: (纸本)0769509819

This paper describes a TV program generation system using digest video scenes that are retrieved from video streams with the program indexes. The key features of the system are: (1) TV programs can be dynamically generated from digest video scenes selected by user preference. (2) Directions can be added using a happiness or sadness level based on the user preferences. (3) Personalized TV programs for an individual viewer can be made. The procedures taken by the system are as follows: (1) Conjunctive expressions between scenes are automatically generated; (2) Emotional expressions are automatically generated by user preference; (3) TV program metaphors are defined; (4) Direction templates corresponding to the metaphors are defined; (5) These expressions and definitions are coded using a markup language, and (6) Contents such as virtual characters and movies are synchronized. The resultant program can be shown on a TV set.

关键词： Layout Markup languages TV broadcasting Satellite broadcasting information retrieval Broadcast technology Digital TV Companies Streaming media Character generation

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Configuring Role-Based Access Control to Enforce Mandatory and Discretionary Access Control Policies

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ACM Transactions on information and system security 2000年第2期3卷 85-106页

作者： Osborn, Sylvia Sandhu, Ravi Munawer, Qamar Dept. of Computer Science The University of Western Ontario London ON N6A 5B7 Canada Laboratory for Information Security Technology MS4A4 Information and Software Engineering Department George Mason University Fairfax VA 22030 United States

Access control models have traditionally included mandatory access control (or lattice-based access control) and discretionary access control. Subsequently, role-based access control has been introduced, along with claims that its mechanisms are general enough to simulate the traditional methods. In this paper we provide systematic constructions for various common forms of both of the traditional access control paradigms using the role-based access control (RBAC) models of Sandhu et al., commonly called RBAC96. We see that all of the features of the RBAC96 model are required, and that although for the mandatory access control simulation, only one administrative role needs to be assumed, for the discretionary access control simulations, a complex set of administrative roles is required. © 2000, ACM. All rights reserved.

关键词： discretionary access control lattice-based access control Management mandatory access control Role-based access control security

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Chinese word classification based on statistics

Chinese word classification based on statistics

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World Congress on Intelligent Control and Automation (WCICA)

作者： Zhao Shi-Wan Xia Ying Ma Shao-Ping Wang Yu Su Zhong Department of Computer Science and Technology State Key Laboratory of Intelligent Technology and System Beijing China

Chinese words classification based on statistics plays an important role in natural language processing, such as speech recognition, intelligent Chinese input method, and so on. We first do statistics and calculation work on the large-scale corpus text, and then use the average mutual information as the global cost function for clustering all Chinese words into a predefined number of classes with a hybrid top-down splitting and bottom-up merging approach. The result of classification is encouraging and can be used in the class-based language model.

关键词： Statistics Mutual information Natural languages Laboratories Intelligent systems computer science Natural language processing Speech recognition Cost function Merging

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Using ODIIPSA98 to design the computer-supporting environment for integrated human-machine discussion system

Using ODIIPSA98 to design the computer-supporting environmen...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Diao Lili Lu Yuchang Shi Chunyi Computer Science and Technology Department The State Key Laboratory of Intelligent Technology and System TsingHua University Beijing China

The study of an integrated human-machine discussion system for supporting economic decisions requires establishing a computer-supporting environment, which can discover the knowledge about economics from heterogeneous information sources, and then utilize them to provide useful information for the experts in different locations. It also should allow real-time discussion among such economic experts and finally upgrade the overall correctness of economic decisions. ODIIPSA98 (Open Distributed Intelligent information Processing system Architecture '98), a pragmatic structural model of open intelligent systems, is MAS-based and information (including multi-media information, knowledge and such like) accessing oriented. The paper first introduces the fundamental ideas and design principles of ODIIPSA98, and then moves to the computer supporting system for upgrading economic decisions, in which ODIIPSA98 serves as its basic framework. After some analyses and comparisons, it is obvious that, such a system, established under the instruction of ODIIPSA98, would gradually show its advantages of open flexibility, reliability, efficiency, and so on.

关键词： Man machine systems Environmental economics Intelligent systems Intelligent structures information processing computer science computer architecture Multimedia systems Distributed computing Intelligent agent

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A knowledge sharing and collaboration system model based on Internet

A knowledge sharing and collaboration system model based on ...

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IEEE International Conference on systems, Man and Cybernetics

作者： Wu Gangshan Huang Yuan Shian-Shyong Tseng Zhang Fuyan State Key Laboratory for Novell Software Technology Department of Computer Science and Technology Nanjing University of Technology Jiangsu China Department of Computer and Information Science National Chiao Tung University Hsinchu Taiwan

This paper proposes a knowledge sharing and collaboration system model (InKB) based on the Internet. It gives a way to collaborate and share knowledge between Web-based knowledge systems. InKB model has three layers: data exchange layer, collaboration layer and knowledge-based application layer. The data exchange layer solves the problem of how to represent and manipulate knowledge. The collaboration layer devotes collaboration between servers over the Internet. The knowledge-based application layer defines the user interface for knowledge processing over the Internet, such as information searching, decision-support application and data mining. Data exchange between InKB Webs is in XML format, knowledge can be shared between heterogeneous knowledge bases, and knowledge can be remotely manipulated. Collaboration between InKBs is supported through a collaboration agent, which can find the resource the user wants in the InKB system. As an open system model, InKB can also support HTTP requests such as information retrieval and browsing.

关键词： Collaboration Internet Web server Knowledge based systems information retrieval XML HTML Laboratories computer science information science

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The research on mobile robot simulation and visualization under Virtual Reality

The research on mobile robot simulation and visualization un...

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International Conference on information, Communications and Signal Processing

作者： Lei Yang Xinxin Yang Kezhong He The State Key Laboratory of Intelligent Technology & System Department of Computer Science Tsinghua University Beijing China

ISBN: (纸本)0780336763

Simulation under Virtual Reality is the front edge of simulation technology. And also, it provide a new method for integrated multisensor simulation under a united environment. In the past, most simulation and animation systems utilized in robotics, which are concerned with simulation of the robot and its environment without simulation of sensors, have difficulty in handling robots that utilize sensory feedback in their operation. Currently, navigation and planning heavily depended on perception has already been mainstream in robotics. Sensor fusion plays a important role in navigation. So, it is important to do research on simulators which deal with multisensor, integrated robot simulation. In this paper, we present a system, which is integrated multisensor feedback under virtual reality, and describe the system architecture and dynamic behavior simulation model. Meanwhile, we also give the difference of simulation between VR system and general 2D system. We choice the mobile robot THMRIII as original source, and give it dynamic simulation model. In order to simulate the uncertainty of ultrasonic sensor, we identify three kinds of uncertainty, and give a ultrasonic sensor model based on fuzzy theory. The sensor simulation algorithm is presented. At the end of this paper, we conclude with discussion of sensor fusion under 3D visualized integrated environment.

关键词： Mobile robots Visualization Robot sensing systems Virtual reality Feedback Navigation Sensor fusion Uncertainty Animation Sensor systems

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