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International Conference on Information Science and engineering (ICISE)

作者： Liang Ming Dongxia Wang Lufeng Zhang Chunlei Wang Jian Tang Jinjing Zhao Nation Key Laboratory of Science and Technology on Information System Security Beijing Institute of System Engineering Beijing China Department of Computer Science and Technology Tsinghua University Beijing 100084 China

As networks develop into large-scale systems, survivability of network systems is imperative. The systematic metrics of network survivability are used to measure or evaluate network survivability. This Paper summarizes the systematic metrics and their lack for measuring or computing network survivability while providing an easy way to reference baseline of the current state. It also provides some principles of network survivability metrics, and divides the current network survivability metrics into three types: target-based network survivability metrics, method-based network survivability metrics, and description-based network survivability metrics. At last, the trend of network survivability metrics is given: A set of quantitative, user-orientation, hierarchical and systematic survivability metrics, which can reflect full aspects and characters during the whole process of survivable networks, are required.

关键词： Measurement Conferences Information systems Computational modeling Systematics Computer security

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A Framework for the Elicitation and Analysis of Information technology Service Requirements and Their Alignment with Enterprise Business Goals

A Framework for the Elicitation and Analysis of Information ...

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IEEE Annual Computer software and Applications Conference Workshops (COMPSACW)

作者： Didar Zowghi Zhi Jin School of Software Faculty of Engineering and IT Sydney University of Technology Sydney Australia Key Laboratory of High Confidence Software Technologies Peking University Beijing China

As the economies of the world have become increasingly dependant on Information technology (IT) services, there is a need for service designers and developers to focus on co-value creation between service providers and service consumers. Developers need to conduct a more rigorous and systematic identification, elicitation, and analysis of IT service requirements than ever before so that the resulting IT services are closely aligned with the enterprise business requirements. Research in Services Science from the business and management discipline has mostly focused on the delivery and management of services experience from the business perspective. Much of the research focus in Service Oriented Computing (SOC) so far has been on the design and delivery of services (especially Web Services), but engineering of IT service requirements has received much less attention. The overall aims of the proposed research is the design and development of an integrated framework and its supporting toolset for the systematic identification, elicitation, and analysis of IT service requirements that satisfy consumers' needs and are closely aligned with their enterprise business goals.

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On an attack on RSA with small CRT-exponents

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Science China(Information Sciences) 2010年第8期53卷 1511-1518页

作者： HAN LiDong 1,2 , WANG XiaoYun 3 & XU GuangWu 3,4 1 key laboratory of Cryptologic technology and Information security, Ministry of Education, Shandong University, Jinan 250100, China 2 School of Mathematics, Shandong University, Jinan 250100, China 3 Institute for Advanced Study, Tsinghua University, beijing 100084, China 4 Department of Electrical engineering and Computer Science, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA 1. Key Laboratory of Cryptologic Technology and Information Security Ministry of Education Shandong University Jinan 250100 China2. School of Mathematics Shandong University Jinan 250100 China3. Institute for Advanced Study Tsinghua University Beijing 100084 China4. Department of Electrical Engineering and Computer Science University of Wisconsin-Milwaukee Milwaukee WI 53201 USA

This paper concerns the RSA system with private CRT-exponents. Since Chinese remainder representation provides efficiency in computation, such system is of some practical significance. In this paper, an existing attack to small private CRT-exponents is analyzed. It is indicated that this attack makes nice use of lattice in RSA analysis, but some argument does not hold in general. Several counterexamples are constructed. Refinements and more precise statements of the attack are given.

关键词： RSA CRT cryptanalysis continued fraction lattice reduction

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Research on failure model of software reliability based on the least squares support vector regression machines and simulated annealing algorithm

Research on failure model of software reliability based on t...

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IEEE International Conference on Management of Innovation and technology, ICMIT

作者： Xiaodong Zhu Renzuo Xu XiLun Chen Bing Chao State Key Laboratory of Software Engineering Wuhan University China Beijing Information Science & Technology University Computer College China

Building a software failure model (SFM) is an important means to compute the software reliability. While there are not enough faults data, the estimation for model parameters is not accurate, which would decrease the fitting precision. In addition, the estimation for parameters of complex models is very complicated. An SFM based on the least squares support vector regression machines (LSSVRM) could decrease the fitting error, and there are no parameters to estimate in that SFM. The LSSVRM optimized by simulated annealing algorithm (SA-LSSVRM) is introduced to overcome the problem of there being free parameters in LSSVRM to be modified manually. The SFM based on SA-LSSVGM could fit the faults data better, and the precision of software reliability could be improved.

关键词： software reliability Least squares methods Simulated annealing software algorithms Parameter estimation Computational modeling Least squares approximation Debugging Computer simulation Laboratories

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Research on systematic metrics of network survivability

Research on systematic metrics of network survivability

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2nd International Conference on Information Science and engineering, ICISE2010

作者： Ming, Liang Wang, Dongxia Zhang, Lufeng Wang, Chunlei Tang, Jian Zhao, Jinjing Nation Key Laboratory of Science and Technology on Information System Security Beijing Institute System Engineering Beijing 100101 China Department of Computer Science and Technology Tsinghua University Beijing 100084 China

ISBN: (纸本)9781424480968

关键词： Large scale systems

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A collaborative framework for privacy protection in online social networks

A collaborative framework for privacy protection in online s...

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International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom)

作者： Yan Zhu Zexing Hu Huaixi Wang Hongxin Hu Gail-Joon Ahn Key Laboratory of Network and Software Security Assurance Ministry of Education Peking University China Institute of Computer Science and Technology Peking University Beijing China School of Mathematical Sciences Peking University Beijing China Laboratory of Security Engineering for Future Computing (SEFCOM) Arizona State University Tempe AZ USA

With the wide use of online social networks (OSNs), the problem of data privacy has attracted much attention. Several approaches have been proposed to address this issue. One of privacy management approaches for OSN leverages a key management technique to enable a user to simply post encrypted contents so that only users who can satisfy the associate security policy can derive the key to access the data. However, the key management policies of existing schemes may grant access to unauthorized users and cannot efficiently determine authorized users. In this paper, we propose a collaborative framework which enforces access control for OSN through an innovative key management focused on communities. This framework introduces a community key management based on a new group-oriented convergence cryptosystem, as well as provides an efficient privacy preservation needed in a private OSN. To prove the feasibility of our approach, we also discuss a proof-of-concept implementation of our framework. Experimental results show that our construction can achieve the identified design goals for OSNs with the acceptable performance.

关键词： Cryptography Servers Kernel Data privacy Social network services Communities Collaboration

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Modeling BPEL and BPEL4People with a Timed Interruptable pi-Calculus

Modeling BPEL and BPEL4People with a Timed Interruptable pi-...

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IEEE Annual International Computer software and Applications Conference (COMPSAC)

作者： Wei Jin Hanpin Wang Yongzhi Cao Zizhen Wang Xiaojuan Ban Institute of Software School of Electronics Engineering and Computer Science Peking University Beijing China Ministry of Education Key laboratory of High Confidence Software Technologies Beijing China Information Engineering School University of Science and Technology Beijing Beijing China

Business Processing Execution Language (BPEL) and BPEL for People (BPEL4People) are two web services orchestration languages for composing web services. To describe formally their semantics, we introduce the π it -calculus, a new variant of the π-calculus, in this paper. The good feature of the π it -calculus is that its execution can be interrupted and can handle timing events as well. We provide both syntax and semantics of the π it -calculus and define a strong bisimulation relation that specifies when two processes can be considered as the same. With the new calculus, we then model the activities of BPEL and BPEL4People, and give their precise semantics. Our formal framework may facilitate the reliability and consistency analysis in a BPEL or BPEL4People design process.

关键词： Timing Semantics Web services Syntactics Humans Calculus Context

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Pairing-Based key Management Scheme for Heterogeneous Sensor Networks

Pairing-Based Key Management Scheme for Heterogeneous Sensor...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Kuiwu Yang Kangfeng Zheng Yixian Yang Shize Guo Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Institute of electronic technology Information and Engineering University Zhengzhou China

key management is challenging in wireless sensor networks (WSNs). Most existing key management schemes mainly consider using symmetric cryptosystems in homogeneous sensor network, but they often do not provide a satisfied storage performance and cause large overhead in establishing shared keys for all pairs of neighbor sensors. In this paper, we propose a key management scheme using for heterogeneous sensor networks (HSNs). Our scheme is based on pairing-based cryptography and has four types of keys according to networks security needs. The scheme reduces the communication cost and key storage spaces of nodes. In fact sensor nodes can agree shared keys without any interaction and no need to store any keys of the other nodes before deployed. Analysis and simulation indicate that the scheme is efficient, and it enables authentication, and robust against different attacks such as replay attack, masquerade attack, Sybil attack etc.

关键词： Base stations Wireless sensor networks Elliptic curve cryptography Mobile computing Elliptic curves

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Research of an Innovative P2P-Based Botnet

Research of an Innovative P2P-Based Botnet

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International Conference on Machine Vision and Human-Machine Interface (MVHI)

作者： Gao Jian YiXian Yang KangFeng Zheng ZhengMing Hu Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Key Laboratory of network and information attack & defence technology of MOE Beijing University of Posts and Telecommunications Beijing China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing China

The research recently focuses on the integration of peer-to-peer frame as incremental improvements to botnet. In hybrid P2P botnet, it is important to find a mechanism to select neighbor list for every super node, in order to improve stability of communication when some super nodes lose. At the same time, it needs to select high performance and nearest node as a super node, to provide command request and file transport for other ordinary nodes. In this paper, we propose a neighbor list selecting method based on Strongly Connected Graph and analysis a super node selecting mechanism based on AHP. Evaluation shows that this mechanism can increase coverage probability of commands and decrease average connection time (ACT) between super node and ordinary node.

关键词： Peer to peer computing Laboratories Command and control systems Protocols Information security Telecommunication switching Authentication Machine vision Man machine systems Information analysis

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A systematic gain setting method of the positive feedback anti-islanding scheme for inverter-based distributed generators

A systematic gain setting method of the positive feedback an...

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2010 International Conference on Power System technology: Technological Innovations Making Power Grid Smarter, POWERCON2010

作者： Wang, Xiaoyu Zhu, Shouzhen Yong, Jing Zheng, Jinghong Xu, Wilsun State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 China State Key Lab. of Power Systems Department of Electrical Engineering Tsinghua University Beijing 100084 China Department of Electrical and Computer Engineering University of Alberta Edmonton AB T6G 2V4 Canada

ISBN: (纸本)9781424459407

This paper proposes a systematic gain setting method for the positive feedback anti-islanding scheme which is designed to protect the interconnected inverter-based distributed generators (DGs) from islanding operation. Two main factors affecting the performance of the anti-islanding scheme are investigated when the positive feedback gain is tuned. One is the stability impact of the anti-islanding control on distributed generation (DG) systems and the other is the islanding detection time of the anti-islanding scheme. The small-signal model and the electromagnetic transient simulation model of an inverter-based DG system are developed to facilitate the realization of the proposed gain setting method. This method provides a practical and reliable tool for DG planning engineers. ©2010 IEEE.

关键词： Distributed power generation

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