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Comparing the efficiencies of different detect strategies in the ping-pong protocol

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Science China(Physics,Mechanics & Astronomy) 2008年第12期51卷 1853-1860页

作者： GAO Fei GUO FenZhuo WEN QiaoYan ZHU FuChen State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Tele-communicationsBeijing 100876China School of Sciences Beijing University of Posts and TelecommunicationsBeijing 100876China National Laboratory for Modern Communications Chengdu 610041China

The way to compare the efficiencies of different detect strategies (DSs) in the "ping-pong" protocol is studied. The trade-off between information gain and dis- turbance is calculated and compared for different DSs. The comparison result primely tallies with our intuitional analysis. It is shown that the analysis of this trade-off is a feasible way to compare the performances of different DSs in theory.

关键词： quantum key distribution quantum cryptography quantum secure direct communication

A Secure Transfer of Identification Information in Medical Images by Steganocryptography

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International Journal of Communications, Network and System Sciences 2010年第10期3卷 801-804页

作者： Shuhong Jiao Robert Goutte 不详

The fast growth of the exchange traffic in medical imagery on the Internet justifies the creation of adapted tools guaranteeing the quality and the confidentiality of the information while respecting the legal and ethical constraints, specific to this field. The joint usage of steganography and cryptography brings an efficient solution, whose implementation in medical routine is realistic, thanks to the current progress in data processing (broad band Internet access and grid computing).

关键词： Medical Image Identification Steganography cryptography

On designated-weight Boolean functions with highest algebraic immunity

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Science China Mathematics 2010年第11期53卷 2847-2854页

作者： LIU MeiCheng1,3, DU YuSong2, PEI DingYi2 & LIN DongDai1 1The State Key Laboratory of Information Security, Institute of Software of Chinese Academy of Sciences, Beijing 100190, China 2College of Mathematics and Information Sciences, Guangzhou University, Guangzhou 510006, China 3Graduate University of Chinese Academy of Sciences, Beijing 100049, China The State Key Laboratory of Information Security Institute of Software of Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China College of Mathematics and Information Sciences Guangzhou University Guangzhou China

Algebraic immunity has been considered as one of cryptographically significant properties for Boolean functions. In this paper, we study ∑d-1 i=0 (ni)-weight Boolean functions with algebraic immunity achiev-ing the minimum of d and n - d + 1, which is highest for the functions. We present a simpler sufficient and necessary condition for these functions to achieve highest algebraic immunity. In addition, we prove that their algebraic degrees are not less than the maximum of d and n - d + 1, and for d = n1 +2 their nonlinearities equalthe minimum of ∑d-1 i=0 (ni) and ∑ d-1 i=0 (ni). Lastly, we identify two classes of such functions, one having algebraic degree of n or n-1.

关键词： cryptography Boolean function algebraic immunity algebraic degree nonlinearity

Multiparty simultaneous quantum identity authentication with secret sharing

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Science China(Physics,Mechanics & Astronomy) 2008年第3期51卷 321-327页

作者： YANG YuGuang1,2,WEN QiaoYan3 & ZHANG Xing4,5 1 College of Computer Science and Technology,Beijing University of Technology,Beijing 100022,China 2 State Key Laboratory of Information Security (Graduate University of the Chinese Academy of Sciences),Beijing 100049,China 3 School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China 4 Institute of Electronic Technology,Information Engineering University,Zhengzhou 450004,China 5 Trusted Computing Laboratory,Beijing University of Technology,Beijing 100022,China College of Computer Science and Technology Beijing University of Technology Beijing China State Key Laboratory of Information Security (Graduate University of the Chinese Academy of Sciences) Beijing China School of Science Beijing University of Posts and Telecommunications Beijing China Institute of Electronic Technology Information Engineering University Zhengzhou China Trusted Computing Laboratory Beijing University of Technology Beijing China

Two multiparty simultaneous quantum identity authentication (MSQIA) protocols based on secret sharing are presented. All the users can be authenticated by a trusted third party (TTP) simultaneously. In the first protocol,the TTP shares a random key K with all the users using quantum secret sharing. The ith share acts as the authentication key of the ith user. When it is necessary to perform MSQIA,the TTP generates a random number R secretly and sends a sequence of single photons encoded with K and R to all the users. According to his share,each user performs the corresponding unitary operations on the single photon sequence sequentially. At last,the TTP can judge whether the impersonator exists. The sec-ond protocol is a modified version with a circular structure. The two protocols can be efficiently used for MSQIA in a network. They are feasible with current technol-ogy.

关键词： quantum identity authentication secret sharing quantum cryptography

Study of the Security in Network Management Based on Mobile Agents

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The Journal of China Universities of Posts and Telecommunications 2004年第4期11卷 37-42页

作者： CHEN Zhi~1 WANG Ru-chuan~(1,2)1.Department of Computer Science and Technology,Nanjing University of Posts and Telecommunications,Nanjing 210003,P.R.China 2.State Key Laboratory for Novel Software Technology,Nanjing University,Nanjing 210093,P.R.China Department of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 P. R. China

Security of mobile-agent based network management must be considered due to the widespread adoption of mo-bile agents in network management,which involves the protections of mobile agents,management station and managed de-vices.The integrated security model proposed in our paper incorporates the effective security countermeasures of these entitiesinto a trusted execution environment and two security protection layers.Sandbox based on Java virtual machine and Javacard independent on the network devices also with the cryptography technology in this model together protect the networkmanagement process.

关键词： network management mobile agent security Java card cryptography

Privacy Preserving Mining of Association Rules on Horizontally Distributed Databases

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Privacy Preserving Mining of Association Rules on Horizontal...

Quantum Authentication Based on the Lengthened String Scheme

2012 International Conference on Software and Computer Applications(ICSCA 2012)

作者： Seyed Ziaeddin Alborzi Fatemeh Raji Mohammad H.Saraee Computer Engineering School Nanyang Technological UniversitySingapore Dept. of Elec. and Computer Engineering Isfahan University of Technology

Many algorithms have been proposed to provide privacy preserving in data mining.These protocols are based on two main approaches named as:the Randomization approach and the Cryptographic approach.The first one is based on perturbation of the valuable information while the second one uses cryptographic techniques.The randomization approach is much more efficient with reduced accuracy while the cryptographic approach can provide solutions with perfect accuracy.However,the cryptographic approach is a much slower method and requires considerable computation and communication overhead.In this paper,a new protocol is proposed which combines the advantages of the two previous approaches to perform privacy preserving in distributed mining of association rules.Both the privacy and performance characteristics of the proposed protocol are studied and compared with the randomization and cryptographic approaches.The approach introduced in this paper has great advantages,such as higher flexibility and resistance against conspiracy,over the similar methods.

关键词： Association rules mining Distributed Data Mining Privacy cryptography

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The Journal of China Universities of Posts and Telecommunications 2004年第z1期11卷 14-17,25页

作者： GUO Fen-zhuo~(1,2), WEN Qiao-yan~1, ZHU Fu-chen~3 1.School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, P.R. China 2.State Key Laboratory of Integrated Services Network, Xidian University, Xi’an 710071, P.R. China 3.National Laboratory for Secure Communication, Chengdu 610041, P.R. China School of Science Beijing University of Posts and Telecommunications Beijing 100876 P.R. China

Assuming there is a shared string between the users, we present a novel scheme, the lengthened string scheme (LSS), where the shared string is lengthened firstly by a specially designed algorithm, then some special treatments are applied on the lengthened one before it is used to authenticate. Based on the lengthened string scheme (LSS) we propose a quantum authentication protocol using entanglements. And the robustness of our protocol is discussed. In fact all the quantum key distribution protocols can do identification simultaneously based on the LSS.

关键词： quantum cryptography quantum authentication quantum key distribution LSS

On Lucas Sequences Computation

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International Journal of Communications, Network and System Sciences 2010年第12期3卷 943-944页

作者： Aleksey Koval Computer Science Department New Jersey Institute of Technology

This paper introduces an improvement to a currently published algorithm to compute both Lucas 'sister' sequences Vk and Uk. The proposed algorithm uses Lucas sequence properties to improve the running time by about 20... 详细信息

关键词： Lucas Sequences cryptography

An Overview Of security Problems in MANET

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An Overview Of security Problems in MANET