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Formal analysis and design of multi-party fair exchange protocols

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Science in China(Series F) 2006年第2期49卷 155-174页

作者： QING Sihan1,2.3.& LI Gaicheng1,3.1. Engineering Research Center for Information Security Technology, Institute of {2., Chinese Academy of Sciences, beijing 100080, China 2. beijing Zhongke Ansheng Corporation of Information Technology, beijing 100080, China 3. Graduate School of the Chinese Academy of Sciences, beijing 10003., China Engineering Research Center for Information Security Technology Institute of Software Chinese Academy of Sciences Beijing China beijing Zhongke Ansheng Corporation of Information Technology Beijing China Graduate School of the Chinese Academy of Sciences Beijing China

Based on the origin of message items and channel combination between transacting parties, and events and relations among events, this paper presents a concise, precise, and hierarchical model for general fair exchange protocols, formally specifies various security requirements which are able to reflect inherent requirements for fair exchange protocols more rigorously, and partition these security requirements with fine granularity. This work helps analyze, debug, and design multi-party fair exchange protocols more effectively and elaborately,

关键词： fair exchange logical protocol formal model security requirement.

Competent predicate abstraction in model checking

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Science China(Information Sciences) 2011年第2期54卷 258-267页

作者： LI Li1,2.3. SONG XiaoYu4, GU Ming2.3.& LUO XiangYu2.3.1Department of Computer Science & Technology, Tsinghua University, beijing 100084, China 2.ey Laboratory for Information System Security, Ministry of Education of China, beijing 100084, China {2., Tsinghua University, beijing 100084, China 4Department of ECE, Portland State University, Portland, Oregon 972.7, USA Department of Computer Science & Technology Tsinghua University Beijing China Key Laboratory for Information System Security Ministry of Education of China Beijing China School of software Tsinghua University Beijing China Department of ECE Portland State University Portland USA

The paper presents a new approach to computing the abstract state and a maximum weight heuristic method for finding the shortest counter-example in verification of imperative programs. The strategy is incorporated in a verification system based on the counterexample-guided abstraction refinement method. The proposed method slashes both the size of the abstract state space and the number of invokes of a decision procedure. A number of benchmarks are employed to evaluate the effectiveness of the approach.

关键词： program model checking predicate abstraction weight heuristic

Multi-dimensional project management models for mega-construction companies and their applications

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Science China(Technological Sciences) 2011年第S1期54卷 118-124页

作者： LIN ZhengHang 1,2.QIANG MaoShan 1,2.TANG WenZhe 1,2.FAN QiXiang 3.&LIU Qiang 4 1 Institute of Project Management and Construction Technology,Tsinghua University,beijing {2.,China 2.State Key Laboratory of Hydraulic and Engineering,Tsinghua University,beijing {2.,China 3.China Three Gorges Corporation,Yichang 443.02.China 4 School of software,Tsinghua University,beijing {2.,China Institute of Project Management and Construction Technology Tsinghua University Beijing China State Key Laboratory of Hydraulic and Engineering Tsinghua University Beijing China China Three Gorges Corporation Yichang China School of software Tsinghua University Beijing China

China is undertaking an increasing number of mega-infrastructure projects along with its rapid economic *** participants in these projects,understand how to adapt the proper and efficient management strategies is *** this paper,we propose three distinct models for companies under various background and management requirements,based on sophisticated data analysis and model ***,we successfully committed these models with hydropower development projects and achieved a great progress in enhancing management efficiency.

关键词： project management models mega-construction companies applications hydropower development companies

3. building modeling,organization and application in digital city system

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中国科学：技术科学英文版 2010年第S1期53卷 134-142页

作者： YANG Xue 1,WENG JingNong 1,2.XIA YuBin 2.WU Lun 3.& SUI ZhengWei 3.1 College of {2.,Beihang University,beijing 100191,China 2.College of Computer,Beihang University,beijing 100191,China 3.Institute of Remote Sensing and GIS,Peking University,beijing 100871,China College of software Beihang University Beijing China College of Computer Beihang University Beijing China Institute of Remote Sensing and GIS Peking University Beijing China

The real world is a three-dimensional(3.)space requiring that 3. geospatial information applications be developed in alignment with the observer’s visual and perceptive ***,3. building model data are required in a wide range of areas such as urban planning,environmental protection,real estate management and emergency *** the same time,the development of Web service[LU1]technologies allows the possibility of the widely distributed 3. geospatial data on the web.3. city building model with its related information is an important part in the construction of a digital city system,and has become a staple resource on the web *** view of the hierarchical representation of a 3. building model,an abstract of a 3. building model based on structure details is studied,and a novel representation approach named 3. transparent building hierarchical model is presented in this *** approach fully uses both the existing 3. modeling technologies and CAD constructing mapping *** the spatial relationship description,structural components inside a building can be represented and integrated as hierarchical models in a unified 3. *** addition,based on the characteristics of the 3. building model data,a service-oriented architecture and Web service technologies for 3. city building models are *** aim of the approach is that 3. city building models can be used as a kind of data resource service on the web,and can also exist independently in various different web applications.

关键词： 3. modeling 3. transparent building hierarchical models China Star web services

Design of secure operating systems with high security levels

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Science in China(Series F) 2007年第3期50卷 399-418页

作者： QING SiHan1,2.& SHEN ChangXiang3.1 Institute of software, Chinese Academy of Sciences, {2. 100080, China 2.S{2. of software and Microelectronics, Peking University, {2. 102.00, China 3.Institute of Computing Technology, Navy, {2. 100841, China Institute of software Chinese Academy of Sciences Beijing China School of software and Microelectronics Peking University Beijing China Institute of Computing Technology Navy Beijing China

Numerous Internet security incidents have shown that support from secure operating systems is paramount to fighting threats posed by modern computing environments. Based on the requirements of the relevant national and international standards and criteria, in combination with our experience in the design and development of the ANSHENG v4.0 secure operating system with high security level （hereafter simply referred to as ANSHENG OS）, this paper addresses the following key issues in the design of secure operating systems with high security levels： security architecture, security policy models, and covert channel analysis. The design principles of security architecture and three basic security models： confidentiality, integrity, and privilege control models are discussed, respectively. Three novel security models and new security architecture are proposed. The prominent features of these proposals, as well as their applications to the ANSHENG OS, are elaborated. Cover channel analysis （CCA） is a well-known hard problem in the design of secure operating systems with high security levels since to date it lacks a sound theoretical basis and systematic analysis approach. In order to resolve the fundamental difficulties of CCA, we have set up a sound theoretical basis for completeness of covert channel identification and have proposed a unified framework for covert channel identification and an efficient backward tracking search method. The successful application of our new proposals to the ANSHENG OS has shown that it can help ease and speedup the entire CCA process.

关键词： secure operating systems with high security levels architecture security model covert channel analysis

Preparing a re-sequencing DNA library of 2.cancer candidate genes using the ligation-by-amplification protocol by two PCR reactions

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Science China(Life Sciences) 2009年第5期52卷 483-491页

作者： SU YeYang1,2.3. LIN Lin1,2.3. TIAN Geng1,2.3. CHEN Chen2.3. LIU Tao2.3. XU Xingya3. QI XinPeng1,2.3. ZHANG XiuQing2.3. YANG HuanMing2.3.1 Graduate School of Chinese Academy of Sciences, beijing 100049, China 2.beijing Institute of Genomics, Chinese Academy of Sciences, beijing 10002., China 3.beijing Genomics Institute, beijing 1013.0, China Graduate School of Chinese Academy of Sciences Beijing China beijing Institute of Genomics Chinese Academy of Sciences Beijing China beijing Genomics Institute Beijing China

To meet the needs of large-scale genomic/genetic studies, the next-generation massively parallelized sequencing technologies provide high throughput, low cost and low labor-intensive sequencing service, with subsequent bioinformatic software and laboratory methods developed to expand their applications in various types of research. PCR-based genomic/genetic studies, which have significant usage in association studies like cancer research, haven't benefited much from those next-generation sequencing technologies, because the shortgun re-sequencing strategy used by such sequencing machines as the Illumina/Solexa Genome Analyzer may not be applied to direct re-sequencing of short-length target regions like those in PCR-based genomic/genetic studies. Although several methods have been proposed to solve this problem, including microarray-based genomic selections and selector-based technologies, they require advanced equipment and procedures which limit their applications in many laboratories. By contrast, we overcame such potential drawbacks by utilizing a ligation by amplification (LBA) protocol, a method using a pair of Universal Adapters to randomly ligate target regions in a two-step-PCR procedure, whose Long LBA products were easily fragmented and sequenced on the next-generation sequencing machine. In this concept-proven study, we chose the consensus coding sequences of two human cancer genes: BRCA1 and BRCA2.as target regions, specifically designed LBA primer pairs to amplify and randomly ligate them. 70 target sequences were successfully amplified and ligated into Long LBA products, which were then fragmented to construct DNA libraries for sequencing on both a conventional Sanger sequencer ABI 3.3.xl DNA Analyzer and the next-generation 'synthesis by sequencing technology' Illumina/Solexa Genome Analyzer. Bioinformatic analysis demonstrated the utility and efficiency (including the coverage and depth of each target sequence and the SNPs detection effectiveness) o

关键词： health genomics the next-generation sequencing techonology sequencing technology large-scale genomics PCR

Modeling and verifying Web services driven by requirements:An ontology-based approach

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Science in China(Series F) 2006年第6期49卷 792-820页

作者： HOU Lishan1,3.JIN ZHi1,2.& WU Budan1,4 1. Academy of Mathematics and Systems Science, Chinese Academy of Sciences, beijing 100080, China 2. Institute of Computing Technology, Chinese Academy of Sciences, beijing 100080, China 3. Institute of {2., Chinese Academy of Sciences, beijing 100080, China 4. Graduate University of Chinese Academy of Sciences, beijing 100049, China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing China Institute of software Chinese Academy of Sciences Beijing China Institute of Computing Technology Chinese Academy of Sciences Bejing China Graduate University of Chinese Academy of Sciences Beijing China

Automatic discovery and composition of Web services is an important research area in Web service technology, in which the specification of Web services is a key issue. This paper presents a Web service capability description framework based on the environment ontology. This framework depicts Web services capability in two aspects： the operable environment and the environment changes resulting from behaviors of the Web service. On the basis of the framework, a requirement-driven Web service composition model has been constructed. This paper brings forward the formalization of Web service interactions with π calculus. And an automatic mechanism converting conceptual capability description to the formal process expression has been built. This kind of formal specification assists in verifying whether the composite Web service model matches the requirement.

关键词： Web service environment ontology automatic composition π calculus formal verification.

Study on Transformation of CaO-Al_2._3.SiO_2.MgO System Inclusions in ZG06Cr13.i4Mo Stainless Steel

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Journal of Iron and Steel Research International 2011年第S2期18卷 341-346页

作者： LIU Jian-hui1,3. DONG Han1,3. ZHU Rong2. LI Shi-qi2.(1. Institute for Structural Materials,Central Iron and Steel Research Institute, {2. 100081,China 2. School of Metallurgical and Ecological Engineering,University of Science and Technology {2., {2. 100083.China 3. National Engineering Research Center of Advanced Steel Technology, {2. 100081,China) Cent Iron & Steel Res Inst Inst Struct Mat Beijing 100081 Peoples R China Natl Engn Res Ctr Adv Steel Technol Beijing 100081 Peoples R China Univ Sci & Technol beijing Sch Met & Ecol Engn Beijing 100083 Peoples R China

This paper aims at generally studying on the inclusions of ZGG06Cr13.i4Mo ultra-low carbon stainless steel used for large scale hydraulic turbine sets. On the basis of analysis the industrial test samples, thermodynamic software FactSage is used to study inclusions transformation process in CaO-SiO2.Al2.3.MgO system while stainless steel is been smelting. The results illustrate the inclusions melting points and plasticity variation law. The reasonable inclusions plasticity controlling area is found out in low melting point. The melting point is up to 12.0℃ While MgO weight concentration is 10% in CaO-SiO2.Al2.3.MgO system, SiO2. Al2.3.and CaO in inclusions are in weight concentration range of 50-70%, 10-2.% and 10-40%, respectively. For purpose of gaining low melting point inclusions, silicon alumina radio in deoxidant should be controlled between 2.5 for ultra-low carbon stainless steel refining in industry.

关键词： ZG06Cr13.i4Mo stainless steel low melting point inclusion thermodynamic calculation

Another ID-Based Proxy Signature Scheme and Its Extension

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Wuhan University Journal of Natural Sciences 2007年第1期12卷 33-36页

作者： ZHANG Jianhong1,2., ZOU Wei3.1. College of Science, North China University of Technology, beijing 100041,China 2. Institute of {2. of Chinese Academy of Sciences /State Key Laboratory of Information Security, beijing 100080, China 3. Institute of Computer Science and Technology, Peking University, beijing 100871, China College of Science North China University of Technology Beijing China State Key Laboratory of Information Security Institute of Software of Chinese Academy of Sciences Beijing China Institute of Computer Science and Technology Peking University Beijing China

So fur, the security of many proxy signatures has seldom been considered in a formal way and most of them cannot satisfy nonepudiation. In this work, a novel ID-based （Identity-based） proxy signature scheme is proposed by combining the proxy signature with ID-based public cryptography, and they formalize the notion of security for ID-based proxy signature schemes. And show that the security of the proposed scheme is secure. Compured with other proxy signature schemes, it does not need a secure channel. Thus, it is particularly suitable for the unreliable network computation environment. Finally, they extend proposed scheme to a proxy multi-signature which has the following advantages （1） the size of proxy multi- signature is independent of the number of delegating users; （2. the computation cost of proxy multi-signature only need two Weil paring.

关键词： proxy signature multisignature security proof