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7th International Conference on Service Systems and Service Management, ICSSSM'10

作者： You, Zhiyang Sun, Zhigang Zhao, Xibin Zang, Daxin Department of Computer Science and Technology Tsinghua University Beijing 100084 China School of Software Tsinghua University Beijing China Key Laboratory of Information System Security Ministry of Education School of Software Tsinghua University Beijing 100084 China Software Engineering Institute Beijing University of Aeronautics and Astronautics Beijing 100084 China

ISBN: (纸本)9781424464876

Robust scheduling is an effective way to solve job-shop scheduling problem (JSP) under a dynamic and stochastic environment with uncertainties, which may lead to numerous schedule disruptions. Maintaining the optimization obtained, the robust schedule is more stable in execution. The vast majority of the researches on robust scheduling concentrate on the development of the robustness and stabilization with an optimization target that minimizes makespan. However, other optimization targets are needed in reality, and in this paper, we introduce another optimization target that maximizes the payload of the machine, which can reflect the capacity of machine. This work applies a two-step way to achieve a robust schedule. A baseline schedule in the deterministic environment is generated first, which pursues standard optimization criterions, and then the temporal buffers are inserted into the baseline schedule which make the schedule absorb some level of unexpected disruption without rescheduling. According to the payload of each machine which should be close to the maximum at any time in execution, we can get each size of the temporal buffers inserted into the different operations. An extensive experiment is used to show the relative performance of the proposed robust schedule. It is shown that the schedule is robust and stable under the stochastic disturbance coupling with minimal makespan tardiness and symmetry payload. ©2010 IEEE.

关键词： Stochastic systems

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Attribute-Based Signature with Policy-and-Endorsement Mechanism

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Journal of Computer Science & technology 2010年第6期25卷 1293-1304页

作者：王怀习朱岩冯荣权 Stephen S.Yau LMAM School of Mathematical SciencesPeking University Electronic Engineering Institute Institute of Computer Science and Technology Peking University Key Laboratory of Network and Software Security Assurance (Peking University) Ministry of Education Information Assurance Center and School of Computing Informatics and Decision Systems Engineering Arizona State University

In this paper a new signature scheme,called Policy-Endorsing Attribute-Based Signature,is developed to correspond with the existing Ciphertext-Policy Attribute-Based *** signature provides a policy-and-endorsement *** this mechanism a single user,whose attributes satisfy the predicate,endorses the *** signature allows the signer to announce his endorsement using an access policy without having to reveal the identity of the *** security of this signature,selfless anonymity and existential unforgeability,is based on the Strong Diffie-Hellman assumption and the Decision Linear assumption in bilinear map groups.

关键词： cryptography fine-grained access control attribute-based signature policy-and-endorsement selfless anonymity existential unforgeability

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Research on XML-based key management service for identity-based cryptography

Research on XML-based key management service for identity-ba...

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International Conference on Multimedia Information Networking and security

作者： Chen, Tieming Jiang, Jie Chen, Bo Li, Wei College of Computer Science and Technology Zhejiang University of Technology Hangzhou China State Key Laboratory of Software Development Environment Beihang University Beijing China Zhejiang Key Laboratory of Information Security Hangzhou China

ISBN: (纸本)9780769542584

Research on the certificate-less public key cryptography has been widely concerned recently. Identity-based cryptography, ***, is the most successful certificateless solution. It can employ an arbitrary ID of a user as her public key, while as the user may request her private key from the key generation center named PKG. However, study on the trusted web service for IBE key management still has not appeared. In this paper, the differences between PKI and IBE are firstly analyzed, and the potentials of building XKMS for IBE are discussed. Then an XKMS-friendly service named IBE-XKMS is proposed, and various key management services are described in detail. Besides the basic XKMS services, IBEXKMS also provides Envelope and Signature service, which can be utilized to develop IBE-enabled applications with Zero Code on client. At last, evaluations on the service performance and communication cost are conducted, comparing with that of PKI-based XKMS. © 2010 IEEE.

关键词： Web services

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A realistic mobility model for urban traffic scenario in Vehicular Delay Tolerant Network

A realistic mobility model for urban traffic scenario in Veh...

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International Conference on Wireless Sensor Network

作者： Yang, Wei-Dong Sun, Li-Min Liu, Ji-Zhao College of Information Science and Engineering Henan University of Technology Zhengzhou Henan 450001 China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9781849192392

The vehicular mobility models have great significance and serious effect on simulation of Vehicular Delay Tolerant Networks. Most of the existing vehicular mobility models can be classified into synthetic mobility models. Though being widely applied, they do not properly reproduce complex urban traffic environment. To improving the vehicular mobility model's reality, this paper analyzed real-world vehicular trace and proposed Real Trace Vehicular Mobility Model with introducing of the traffic flow theory. This model incorporated resident area and more realistic speed rule. On this basis, the further analysis of the proximity of the model, the statistical characteristic and the network connection characteristic are given in this paper. The simulation results show that the proposed model can properly approximate the actual vehicular behaviour in urban traffic scenario.

关键词： Delay tolerant networks

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A mobility model based on traffic flow theory for Vehicular Delay Tolerant Network

A mobility model based on traffic flow theory for Vehicular ...

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International Conference on Bio-Inspired Computing: Theories and Applications, BICTA

作者： Yang, Wei-Dong Liu, Ji-Zhao Zhu, Hong-Song College of Information Science and Engineering Henan University of Technology Zhengzhou Henan 450001 China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9781424464388

The choice of the mobility models affect seriously the simulation results of the key technologies for Vehicular Delay Tolerant Networks. Most of the existing vehicular mobility models can be classified into synthetic mobility model which do not conform to the real scenario. With the real vehicular trace, this paper proposed realistic vehicular mobility model based on traffic flow theory which has considered the road topology, the vehicular speed rules and the routing selection. On this basis, this paper analyzed the model's proximity of the actual vehicular behaviour, this model's statistical characteristic and network connection characteristic. The simulation results show that the proposed model can properly approximate the actual vehicular behaviour in urban traffic scenario. © 2010 IEEE.

关键词： Topology

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GLP: A group link prediction algorithm in DTMNs

GLP: A group link prediction algorithm in DTMNs

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International Conference on Educational and Information technology (ICEIT)

作者： Wu, Junying Xia, Chunhe Lv, Liangshuang Wang, Haiquan Beijing Key Laboratory of Network Technology School of Computer Science and Engineering Beihang University Beijing China College of Software Beihang University Beijing China

ISBN: (纸本)9781424480340

In DTNs, links are rare. Making full use of every link shows great importance to routing protocols. Link Prediction (LP) can predict future links between two nodes. Plenty of algorithms for link prediction have been proposed and were applied to various real networks, like social network. But few were applied to wireless ad hoc networks. Some recent works were done to study mobility prediction on link availability prediction, which was to predict the reliability of existing links [1-8]. In this paper, we study link prediction algorithms that use only topology information and adjust it to mobility ad hoc networks. We propose a Group Link Prediction Algorithm (GLP). GLP can predict future link not only between nodes, but also between groups. GLP is a distributed, lightweight algorithm. Simulation shows that GLP has significant performance in group mobility ad hoc networks. In the future, a routing protocol in the full use of GLP will be studied. © 2010 IEEE.

关键词： Routing protocols

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Implicit detection of stealth software with a local-booted Virtual machine

Implicit detection of stealth software with a local-booted V...

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3rd International Conference on Information Sciences and Interaction Sciences, ICIS 2010

作者： Wen, Yan Huang, Minhuan Zhao, Jinjing Kuang, Xiaohui Beijing Institute of System Engineering Beijing China National Key Laboratory of Science and Technology on Information System Security Beijing China Department of Computer Science and Technology Tsinghua University Beijing China

ISBN: (纸本)9781424473854

Resource hiding is commonly used by stealth malware to evade detection by anti-malware scanners. In this paper, we present the design, implementation, and evaluation of Libra, a new VM-based anti-stealth-malware approach. By introducing the novel local-booting technology of our previous work called Secure Virtual Execution Environment, Libra VM just boots from the underlying host OS but not a newly installed OS image. Consequently, Libra accurately reproduces the software environment of the underlying preinstalled OS within the Libra VM. In addition, with proposing a set of unique techniques to implicitly construct the trusted OS-level semantic view of resource from within the virtualized hardware layer, Libra is decoupled with the guest information which is subvertable to the privileged guest malware. Thus, Libra provides a promising way to detect the existing stealth malware in the host OS. We have implemented a prototype of Libra on Windows platforms and our evaluation results with real-world rootkits demonstrate the practicality and effectiveness of our approach.

关键词： Malware

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A routing-based dynamic workflow

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Information technology Journal 2010年第3期9卷 561-568页

作者： Zhu, Chang Yan Du, Yuyue Li, Peng College of Information Science and Engineering Shandong University of Science and Technology Qingdao 266510 China State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing 100080 China

The changes in dynamic workflows are various, such as role-based dynamic workflows, resource based dynamic workflows and so on. A routing-based dynamic workflow is proposed in this study and Agent technology is introduced into workflow management systems. At the environment only with initial and objective active nodes, route and terminal nodes can be autonomously chosen based on a routing algorithm to optimize the routing selection of workflow processes, so the method proposed in this study can optimize workflow management systems. © 2010 Asian Network for Scientific Information.

关键词： Workflow management

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Improved impossible differential cryptanalysis on SMS4

Improved impossible differential cryptanalysis on SMS4

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2010 International Conference on Communications and Intelligence Information security, ICCIIS 2010

作者： Wang, Gaoli School of Computer Science and Technology Donghua University Shanghai China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing China

ISBN: (纸本)9780769542607

This paper presents an improved impossible differential attack on the block cipher SMS4 which is used in WAPI (the Chinese WLAN national standard). Combining with some new observations, this paper can filter out the wrong keys more efficiently, and present an impossible differential attack on 17-round SMS4, which updates the best known impossible differential attacks on reduced SMS4. © 2010 IEEE.

关键词： Cryptography

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A novel VoIP flooding detection method basing on call duration

A novel VoIP flooding detection method basing on call durati...

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International Conference on Pervasive Computing, Signal Processing and Applications

作者： Yang, Tianlu Zheng, Kangfeng Yang, Yixian Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing China Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China National Engineering Laboratory for Disaster Backup and Recovery Beijing China

ISBN: (纸本)9780769541808

Through deeply analysis of INVITE flooding attack of SIP based VoIP system, a novel VoIP flooding detection scheme called CDVFD (Call Duration based VoIP Flooding Detection) is presented. The CDVFD method makes use of SIP signaling bidirectional interaction, and it can make fast detection using Chi-square value, and can distinguish from normal high VoIP traffic. Experimental results show the effectiveness of the method. © 2010 IEEE.

关键词： Internet telephony

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