检索结果-内蒙古大学图书馆

1st International Conference on Information Science and engineering, ICISE2009

作者： Zhang, Lei Zhang, Futai School of Computer Science and Technology Nanjing Normal University China Department of Computer Engineering and Mathematics Universitat Rovira I Virgili E-43007 Tarragona Catalonia Spain Jiangsu Engineering Research Center on Information Security and Privacy Protection Technology Nanjing China

ISBN: (纸本)9780769538877

Partially blind signature is a variant of blind signature. It allows a signer to explicitly include common information in a blind signature under some agreement with a receiver. It provides anonymity of users in applications such as electronic voting and electronic payment systems. While certificateless public key cryptography eliminates the key escrow problem in identity public key cryptography. In this paper, we introduce the concept of partially blind signature into certificateless public key cryptography. The security model of certificateless partially blind signature scheme is defined. A certificateless partially blind signature scheme is presented as well. The scheme is proven existentially unforgeable against adaptive chosen-message attacks under the computational Diffie-Hellman assumption. ©2009 IEEE.

关键词： Public key cryptography

来源：评论

学校读者我要写书评

暂无评论

The role of semantics in games and simulations

引用

computers in Entertainment 2008年第4期6卷 57-57页

作者： Tutenel, Tim Bidarra, Rafael Smelik, Ruben M. De Kraker, Klaas Jan D. Delft University of Technology Netherlands TNO Defense Safety and Security Netherlands Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Netherlands Modeling and Simulation Department TNO Defense Safety and Security Netherlands

Powerful graphics hardware is enabling strong improvements in both the appearance and the complexity of virtual worlds for games and simulations. However, current practices in the design and development of virtual worlds mostly resemble high-tech variants of traditional handcrafts, resulting in increasingly unbearable design costs. In this article we state that an essential key to overcoming these problems lies in the enrichment of object models with several kinds of semantic data. We discuss numerous and promising uses for semantic information in virtual worlds, and show, for many of them, how previous results of recent research can be successfully applied. We also identify the fundamental challenges in this new cross-disciplinary area, and point out a number of open issues lying ahead, including the need for (i) a suitable way of specifying semantic data, providing a powerful vocabulary that is useful and usable for all disciplines involved in game design and development;(ii) a seamless integration of semantic data integrated with procedural generation techniques, in order to provide designers with a new and powerful generation of tools;and (iii) a consistency maintenance among evolving objects in a changeable environment, for which powerful constraint-solving methods will be instrumental. We conclude that, as the expectancy for future games and simulations steadily shifts from improved graphics and appearance towards improved character behavior, plausible realism and coherent gameplay, embedding the game world and its objects with richer semantics is going to play a crucial role. We can therefore expect that, in the near future, increasing research efforts and influential results will be emerging in this new exciting area. © 2008 ACM.

关键词： Semantics

来源：评论

学校读者我要写书评

暂无评论

security Analysis of CIKS-128 and CIKS-128H Using Key Schedule Weaknesses

Security Analysis of CIKS-128 and CIKS-128H Using Key Schedu...

引用

International Symposium on computer Science and its Applications, CSA

作者： Changhoon Lee Jongsung Kim Seokhie Hong Sangjin Lee Jaechul Sung Hwa-Min Lee Center for Information Security Technologies Korea University Seoul South Korea Department of Mathematics University of Seoul Seoul South Korea Department of Computer and Engineering Soonchunhyang University Asan Chungnam South Korea

ISBN: (纸本)9780769534282

In this paper, we show that CIKS-128 and CIKS-128H are vulnerable to related-key differential attacks. We first describe how to construct their full-round related-key differential characteristics with high probabilities and then we exploit them to break the full-round CIKS-128 and CIKS-128H with 2 44 ,and 2 48 data and time complexities, respectively. These woks are corrections of Lee et al.'s results [7].

关键词： Cryptography Complexity theory security Schedules Linearity Switches Control systems

来源：评论

学校读者我要写书评

暂无评论

A "medium-field" multivariate public-key encryption scheme

A "medium-field" multivariate public-key encryption scheme

引用

Topics in Cryptology - CT-RSA 2006: The Cryptographers' Track at the RSA Conference 2006, Proceedings

作者： Wang, Lih-Chung Yang, Bo-Yin Hu, Yuh-Hua Lai, Feipei Department of Applied Mathematics National Donghua University Hualien Taiwan Department of Mathematics Tamkang University Tamsui Taiwan Taiwan Information Security Center Taipei Taiwan Department of Computer Science and Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9783540310334

Electronic commerce fundamentally requires two different public-key cryptographical primitives, for key agreement and authentication. We present the new encryption scheme MFE, and provide a performance and security review. MFE belongs to the MQ class, an alternative class of PKCs also termed Polynomial-Based, or multivariate. They depend on multivariate quadratic systems being unsolvable. The classical trapdoors central to PKC's are modular exponentiation for RSA and discrete logarithms for ElGamal/DSA/ECC. But they are relatively slow and will be obsoleted by the arrival of QC (Quantum computers). The argument for MQ-schemes is that they are usually faster, and there are no known QC-assisted attacks on them. There are several MQ digital signature schemes being investigated today. But encryption (or key exchange schemes) are another story - in fact, only two other MQ-encryption schemes remain unbroken. They are both built along "big-field" lines. In contrast MFE uses mediumsized field extensions, which makes it faster. For security and efficiency, MFE employs an iteratively triangular decryption process which involves rational functions (called by some "tractable rational maps") and taking square roots. We discuss how MFE avoids previously known pitfalls of this genre while addressing its security concerns. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Public key cryptography

来源：评论

学校读者我要写书评

暂无评论

3D CAD Drawing Watermarking Based on Three Components

3D CAD Drawing Watermarking Based on Three Components

引用

IEEE International Conference on Image Processing

作者： Ki-ryong Kwon Hey-jung Chang Gwang S. Jung Kwang-seok Moon Suk-hwan Lee Divisiorn of Electronic Computer and Telecommuication Engineering Pukyong National University South Korea Department of Mathematics and Computer Science CUNY USA Department of Information Security Tongmyong University South Korea

This paper proposed a watermarking for copyright protection of 3D CAD design drawing based on 3 basic components that are Line, ARC, and 3DFACE. The watermark is embedded into the length in Line, the radius of curvature in Arc, and the length ratio of two sides in 3DFACE. Selecting the embedding component can be done by the distribution of 3D drawing or preference of owners. By experimental result, we confirmed the invisibility of embedded watermarks as well as the robustness in various attacks.

关键词： Watermarking Design automation Solid modeling Copyright protection engineering drawings Robustness Graphics Construction industry Moon Telecommunication computing

来源：评论

学校读者我要写书评

暂无评论

Image authentication based on modular embedding

Image authentication based on modular embedding

引用

作者： Lee, Moon Ho Korzhik, Valery Morales-Luna, Guillermo Lusse, Sergei Kurbatov, Evgeny Department of Information and Communication Chonbuk National University Korea Republic of State University of Telecommunications St. Petersburg Russia Computer Science CINVESTAV-IPN Mexico City Mexico Departments of Information and Communication Korea Republic of Chonbuk National University Korea Republic of National Academy of Engineering Korea Republic of Mathematics Institute Polish Academy of Sciences Poland Department of Information Security St. Petersburg State Telecomunication University Russia Siemens Company Department of Information Security

We consider a watermark application to assist in the integrity maintenance and verification of the associated images. There is a great benefit in using WM in the context of authentication since it does not require any additional storage space for supplementary metadata, in contrast with cryptographic signatures, for instance. However there is a fundamental problem in the case of exact authentication: How to embed a signature into a cover message in such a way that it would be possible to restore the watermarked cover image into its original state without any error? There are different approaches to solve this problem. We use the watermarking method consisting of modulo addition of a mark and investigate it in detail. Our contribution lies in investigating different modified techniques of both watermark embedding and detection in order to provide the best reliability of watermark authentication. The simulation results for different types of embedders and detectors in combination with the pictures of watermarked images are given. Copyright © 2006 The Institute of Electronics, Information and Communication Engineers.

关键词： Copyrights

来源：评论

学校读者我要写书评

暂无评论

Multi-template ASM method for feature points detection of facial image with diverse expressions

Multi-template ASM method for feature points detection of fa...

引用

FGR 2006: 7th International Conference on Automatic Face and Gesture Recognition

作者： Li, Ying Lai, J.H. Yuen, Pong C. Department of Mathematics SUN YAT-SEN University China School of Informatics Guangdong University of Foreign Studies China Department of Electronics and Communication Engineering School of Information Science and Technology SUN YAT-SEN University China Guangdong Province Key Laboratory of Information Security China Department of Computer Science Hong Kong Baptist University Hong Kong Hong Kong

ISBN: (纸本)0769525032

This paper proposed a multi-template ASM algorithm addressing facial feature points detection under nonlinear shape variation of facial images with various kinds of expression. By adding texture information, adopting asymmetric sampling strategy for the feature points on outer contour of face, building multiple templates and integrating local ASM and global ASM, experimental results show that the proposed multi-template ASM algorithm outperforms traditional single template ASM. © 2006 IEEE.

关键词： Face recognition

来源：评论

学校读者我要写书评

暂无评论

Analysis of resonant behavior in planar line arrays of rings by the eigencurrent approach

Analysis of resonant behavior in planar line arrays of rings...

引用

European Conference on Microwave

作者： D.J. Bekers S.J.L. van Eijndhoven A.A.F. van de Ven P.-P. Borsboom A.G. Tijhuis TNO Defence security and safety Observation Systems The Hague Netherlands Department of Mathematics and Computer Science Technische Universiteit Eindhoven Eindhoven Netherlands SARA Computing and Networking Services Amsterdam Netherlands Department of Electrical Engineering Technische Universiteit Eindhoven Eindhoven Netherlands

Resonant behavior in a finite array that appears as (modulated) impedance or current-amplitude oscillations may limit its bandwidth substantially. Therefore, simulations should predict such behavior. Recently, a new approach has been developed, called the eigencurrent approach, which can predict resonant behavior in finite arrays. Analysis of line arrays of II-plane oriented microstrip rings by the eigencurrent approach reveals that resonant behavior is caused by excitation of one of the eigencurrents. The characteristic impedance of this eigencurrent becomes small in comparison to the characteristic impedances of the other eigencurrents that can exist on the array geometry.

关键词： Resonance Impedance Antenna arrays Microstrip antenna arrays mathematics computer science Bandwidth Geometry Eigenvalues and eigenfunctions computer security

来源：评论

学校读者我要写书评

暂无评论

Electronic national lotteries

引用

8th International Conference on Financial Cryptography, FC 2004

作者： Konstantinou, Elisavet Liagkou, Vasiliki Spirakis, Paul Stamatiou, Yannis C. Yung, Moti Research and Academic Computer Technology Institute P.O. Box 1122 Patras26110 Greece Department of Computer Engineering and Informatics University of Patras Patras26500 Greece Department of Mathematics University of the Aegean Karlovassi Samos83200 Greece on Communications and Information Systems Security University of the Aegean and Athens University of Economics and Business Greece Computer Science Columbia University New YorkNY United States

ISBN: (纸本)3540224203

We describe the design and implementation of secure and robust protocol and system for a national electronic lottery. Electronic lotteries at a national level are a viable cost effective alternative to mechanical ones when there is a business need to support many types of "games of chance" and to allow increased drawing frequency. Electronic lotteries are, in fact, extremely high risk financial application: If one discovers a way to predict or otherwise claim the winning numbers (even once) the result is huge financial damages. Moreover, the e-lottery process is complex, which increases the possibility of fraud or costly accidental failures. In addition, a national lottery must adhere to auditability and (regulatory) fairness requirements regarding its drawings. Our mechanism, which we believe is the first one of its kind to be described in the literature, builds upon a number of cryptographic primitives that ensure the unpredictability of the winning numbers, the prevention of their premature leakages and prevention of fraud. We also provide measures for auditability, fairness, and trustworthiness of the process. Besides cryptography, we incorporate security mechanisms that eliminate various risks along the entire process. Our system which was commissioned by a national organization, was implemented in the field and has been operational and active for a while, now. © IFCA/Springer-Verlag Berlin Heidelberg 2004.

关键词： Cryptography

来源：评论

学校读者我要写书评

暂无评论

Efficient and secure conference-key distribution

引用

International Workshop on security Protocols, 1996

作者： Burmester, Mike Desmedt, Yvo G. Information Security Group Department of Mathematics University of London Royal Holloway Egham SurreyTW20 OEX United Kingdom Department of Electrical Engineering and Computer Science University of Wisconsin-Milwaukee WI53201-0784 United States

ISBN: (纸本)3540624945

Key distribution is a major cryptographic component for secure communication. For privacy data must be encrypted with keys which are distributed securely. In this paper we focus on conference key distribution. Our approach is to use a two-party key distribution system as an underlying cryptographic primitive and extend it to a conference system. We consider three different models: an unconditionally secure model, a provably secure model, and a model whose security is based on the difficulty of breaking the Diffie-Hellman problem. For each of these we present a conference key distribution system which is as secure as the primitive. These extend and generalize our conference scheme presented at Eurocrypt '94. In particular, (i) we are not restricted to any specific network or primitive and, (ii) our system based on the Diffie-Hellman key exchange is more efficient. © Springer-Verlag Berlin Heidelberg 1997.

关键词： computers

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：