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International Workshop on Education Technology and computer science, ETCS

作者： Wanfeng Dou Wei He School of Computer Science and Technology Jiangsu research center of Information Security & Confidential Engineering Nanjing Normal University Nanjing China Department of Mechanical Engineering Nanjing Institute of Industry Technology Nanjing Jiangsu China

ISBN: (纸本)9781424463886;9780769539874

Distributed pair programming (DPP) supports two programmers to work on the same task from different locations. One programmer acting as the driver controls the keyboard and mouse to actively write code or design document. The other partner as the navigator helps plan as well as identifies and prevents any syntactic or strategic deficiencies in code or design document. This paper first reviews the existing DPP tools and how to increase the compatibility of pair programmers. Then some pilot experiment results are proposed of pair programming with 53 students in Software engineering course. Finally, the paper analyzes the compatibility problems of pair programming such as gender, time management, and active learning outside the classroom, which are resolved by the DPP, and some basic requirements of the DPP system are given.

关键词： Programming profession Collaborative work computer science computer science education Educational programs Educational technology Keyboards Mice Navigation Collaboration

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Development of an on-chip micro shielded-loop probe to evaluate performance of magnetic film to protect a cryptographic LSI from electromagnetic analysis

Development of an on-chip micro shielded-loop probe to evalu...

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IEEE International Symposium on Electromagnetic Compatibility (EMC)

作者： Masahiro Yamaguchi Hideki Toriduka Shoichi Kobayashi Takeshi Sugawara Naofumi Hommaa Akashi Satoh Takafumi Aoki Department of Electrical and Communication Engineering Graduate School of Engineering University of Tohoku Sendai Japan Department of Computer and Mathematical Sciences Graduate School of Engineering University of Tohoku Sendai Japan Research Center of Information Security Advanced Industrial Science and Technology Chiyoda Tokyo Japan

Two types of miniature shielded-loop type magnetic probes were used to analyze RF magnetic near field on the ISO/IEC 18033-3 Standard Cryptographic LSI made by 0.13 μm CMOS process with clock frequency of 24 MHz. The 180 × 180 μm 2 -size on-chip shielded loop probe we developed was applied to scan the magnetic near field on the LSI and clarified that the magnetic filed is strong not only on the targeting cryptographic circuit. Such a detailed map was depicted for the first time for cryptographic LSI. Then the differential electromagnetic analysis (DEMA) was performed with the shielded-loop probe (1000 × 500 μm 2 , CP-2S, NEC). All the BITEs of 16-BYTEs long secret key are decrypted by using only 1×10 4 waveform data in case the waveform is measured closely to the cryptographic circuit whereas the error rate does not converge to zero until the waveform number reaches 3×10 4 if the data were extracted far away from the circuit. As the countermeasure against DEMA, 25 μm thick magnetic film (μr=50 at 1MHz, NEC Tokin Co, type E25) was attached on top of bare LSI chip to suppress magnetic field intensity by 6 dB, which can be a good candidate to protect cryptographic LSI from side channel attack.

关键词： Probes Cryptography Large scale integration Magnetic field measurement Coils Semiconductor device measurement System-on-a-chip

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A generic weakness of the k-normal Boolean functions exposed to dedicated algebraic attack

A generic weakness of the k-normal Boolean functions exposed...

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International Symposium on information Theory and Its Applications, ISITA

作者： Miodrag Mihaljević Sugata Gangopadhyay Goutam Paul Hideki Imai Mathematical Institute Serbian Academy of Arts and Sciences Belgrade Serbia Serbian Academy of Sciences and Arts Mathematical Institute Belgrade Serbia Research Center for Information Security (RCIS) Nat. Inst. Adv. Ind. Sci.&Tech. (AIST) Tokyo Japan Department of Mathematics Indian Institute of Technology Roorkee India Department of Computer Science and Engineering Jadavpur University Kolkata India Faculty of Sciences and Engineering Chuo University Tokyo Japan RCIS-AIST Tokyo Japan

A Boolean function is k-normal if it is constant on a k-dimensional flat of its domain. This paper demonstrates that k-normality of a Boolean function can be exploited to mount a dedicated algebraic attack on a stream cipher of the nonlinear filter generator type, which employs a k-normal Boolean function as its filter function. The cryptanalysis is based on the possibility for pre-computing a table of the state-key stream pairs via solving certain system of algebraic equations as a consequence of the employed k-normal Boolean function. This pre-computed table is the main origin for mounting the cryptanalysis and it is independent of a the sample for cryptanalysis and the secret key employed for generating the sample.

关键词： Boolean functions Generators Cryptography Equations Algorithm design and analysis Complexity theory

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A DIGITAL SIGNATURE-BASED VISUAL CRYPTOGRAPHY SCHEME FOR IMAGE DISCRIMINATION AND MANAGEMENT

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Journal of Electronics(China) 2009年第5期26卷 631-636页

作者： Han Yanyan Hu Yupu He Wencai Engineering Research Center of Information Security Beijing Electronic Science and Technology Institute Beijing 100070 China Ministry of Education Key Laboratory of Computer Networks ＆ Information Security Xidian University Xi＇an 710071 China Department of Scientific Research Beijing Electronic Science and Technology Institute Beijing 100070 China

Visual cryptography is a cryptographic technique which emerges in the information security domain in recent years. Each of the sharing sub-keys may be a stochastic noise image or a significative image with no information on the original key. But a mass of sub-keys have to be saved actually, which faces the problem of inconvenient discrimination and management. This paper presents a visual cryptography scheme based on the digital signature for image discrimination and management, applying the digital signature and the time-stamp technology to the visual cryptography scheme. The scheme both solves the problem on the storage and management of the sharing sub-keys, increases the verification of image contents, thus enhances the validity of storage and management without security effect.

关键词： Visual cryptography Digital signature Time-stamp

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Mobile agent watermarking (MAW): security properties and attacks revisited 09

Mobile agent watermarking (MAW): Security properties and att...

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6th International Conference on Frontiers of information Technology, FIT '09

作者： Khan, Abid Niu, Xiamu Anwar, Waqas Ahmed, Mansoor Nawaz Khan, Ali Department of Computer Science COMSATS Institute of Information Technology Islamabad Pakistan Information Security Technique Research Center Harbin Institute of Technology Shenzhen Graduate School China Department of Computer Science COMSATS Institute of Information Technology Abbottabad Pakistan Department of Electrical Engineering COMSATS Institute of Information Technology Lahore Pakistan

ISBN: (纸本)9781605586427

Providing integrity of execution is considered as the most challenging problem in Mobile Agent System (MAs). Mobile agent watermarking (MAW) is a technique that attempts to provide integrity of execution to a mobile agent. We discuss the attacks against MAW technique and how the security properties for MAs data integrity are fulfilled. We try to model the behavior of a malicious host by launching a series of passive attacks against mobile agent and then see to what extent the security properties for mobile agent can be achieved. The experimental results suggest that MAW framework can be used to protect the computations results of mobile agents Copyright 2009 ACM.

关键词： Mobile agents

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Ideal perfect multilevel threshold secret sharing scheme

Ideal perfect multilevel threshold secret sharing scheme

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5th International Conference on information Assurance and security, IAS 2009

作者： Lin, Changlu Harn, Lein Ye, Dingfeng Key Laboratory of Network Security and Cryptology Fujian Normal University China State Key Laboratory of Information Security Graduate University of Chinese Academy of Sciences China Key Laboratory of Communication and Information System Beijing Jiaotong University Beijing Municipal Commission of Education China Department of Computer Science Electrical Engineering University of Missouri-Kansas City United States

ISBN: (纸本)9780769537443

Shamir proposed the first (t, n) threshold secret sharing scheme. Shamir's scheme is ideal and perfect. In this paper, we propose two modifications of Shamir's secret sharing scheme. In our first modification, each shareholder keeps both x-coordinate and y-coordinate of a polynomial as private share. In our second modification, dealer uses polynomial with degree larger than the threshold value t to generate shares for a (t, n) threshold scheme. We show that these two modified schemes are ideal and perfect. Using these two modifications, we design a multilevel threshold secret sharing schemes (MTSS). We prove that the proposed scheme is secure. © 2009 IEEE.

关键词： information theory

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Certificateless partially blind signatures

Certificateless partially blind signatures

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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

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Ideal Perfect Multilevel Threshold Secret Sharing Scheme

Ideal Perfect Multilevel Threshold Secret Sharing Scheme

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The Fifth International Conference on information Assurance and security(第五届信息保障与安全国际会议)

作者： Changlu Lin Lein Harn Dingfeng Ye Key Laboratory of Network Security and Cryptology Fujian Normal University China State Key Laborat Department of Computer Science Electrical Engineering University of Missouri-Kansas CityUSA State Key Laboratory of Information Security Graduate University of Chinese Academy of SciencesChin

ISBN: (纸本)9780769537443

关键词： Secret sharing threshold multilevel threshold secret sharing

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Generic Transformation from Weakly to Strongly Unforgeable Signatures

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Journal of computer science & Technology 2008年第2期23卷 240-252页

作者：黄琼王石李进赵一鸣 Department of Computer Science City University of Hong KongHong KongChina International Research Center for Information Security(IRIS) Information and Communications University( ICU)103-6 Munji-DongYuseong-GuDaejeon305-732Korea Department of Computer Science and Engineering Fudan UniversityShanghaiChina

Current techniques for transforming unforgeable signature schemes （the forged message has never been signed） to strongly unforgeable ones （the forged message could have been signed） require supplementary components to be added onto the original key pairs of the schemes. In addition, some of them can only be applied to a certain type of signature schemes. In this paper, we propose a new generic transformation technique which converts any unforgeable signature scheme into a strongly unforgeable one without modifying any component in the original key pair. This makes our technique especially compatible for practical use. Our technique is based on strong one-time signature schemes. We show that they can be constructed efficiently from any one-time signature scheme that is based on one-way functions. The performance of our technique also compares favorably with that of current ones. Besides, it is shown in this paper that our transformation can further be applied to schemes satisfying only a weak variant of unforgeability without any further modification. Furthermore, our technique can also be used for constructing strongly unforgeable signature schemes in other cryptographic settings which include certificateless signature, identity-based signature, and several others. To the best of our knowledge, similar extent of versatility is not known to be supported by any of those comparable techniques. Finally and of independent interest, we show that our generic transformation technique can be modified to an on-line/off-line signature scheme, which possesses a very efficient signing process.

关键词： signature strong unforgeability weak unforgeability one-time signature

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Design of high-speed network intrusion detection system architecture

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Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology 2009年第SUPPL. 1期41卷 198-200页

作者： Yao, Wen-Bin Wang, Cong Liu, Jian-Yi Si, Yan-Fang Yang, Yi-Xian National Engineering Laboratory for Disaster Backup and Recovery Beijing 100876 China Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Department of Computer Science and Technology Harbin Engineering University Harbin 150001 China

Parallel approach is an important way to improve the performance of networked based intrusion detection system. A parallel architecture of intrusion detection system based on the ideas of combining twice data-flow partition with real-time load balancing feedback is presented. The components of data-flow partition and its optimized algorithm are designed and implemented. The experiment shows that the architecture may have higher speed and lower packet loss in high-speed network circumstance. Thus, it may raise the speed of data transmission and improve the efficiency of parallel intrusion detection.

关键词： Intrusion detection

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