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Netflow based network service QoS monitor system

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) 2008年第SUPPL. 1期38卷 114-117页

作者： Wu, Hua Gong, Jian Zhang, Xiaoyu School of Computer Science and Engineering Southeast University Nanjing 210096 China Key Laboratory of Computer Network Technology of Jiangsu Province Nanjing 210096 China

In order to obtain the network performance metrics from the Netflow, the reliability of obtaining the network metrics from the sampled Netflow is analyzed. A Netflow based network service QoS (quality of service) monitor system is designed. The dactylogram of services can be distilled and used as the QoS baseline to judge the status of the services. The data analysis method, the variety of single zone's behavior and the dactylograms of services are described. The abnormity services can be detected by the exceptional status of the network. The system can be extended to new applications and have a good application prospect.

关键词： Quality of service

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keying material based key pre-distribution scheme

Keying material based key pre-distribution scheme

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IEEE International Conference on Intelligence and Security Informatics, ISI

作者： Zhihong Liu Jianfeng Ma Qiping Huang SangJae Moon Key Laboratory of Computer Networks and Information Security of Ministry of Education Xidian University Xi'an China School of Communication Engineering Xidian University Xi'an China Mobile Network Security Technology Research Center Kyungpook National University South Korea

A key pre-distribution scheme is a method by which initially an off-line trusted authority T A distributes pieces of information among a set of users. Later, each member of a group of users can compute a common key for secure communication. In this paper we present a keying Material Based key Pre-distribution Scheme, i.e., a group of users, using secret information preloaded in their memory and some public information retrieved from a keying material server, can compute a common key. We first formally define the keying material based key pre-distribution scheme in terms of the entropy, and give lower bounds on the amount of information each user has to keep secret. Then, we describe its applications for sensor networks.

关键词： Base stations Information security Moon Information retrieval network servers Public key cryptography computer networks Electronic mail National security Protocols

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Limitedly dividable stream-based modeling and performance analysis of P2P streaming networks

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Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) 2008年第SUPPL. 1期38卷 145-149页

作者： Wu, Jiagao Tao, Jun Zou, Zhiqiang Institute of Computer Technology College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Laboratory of Computer Network and Information Integration Southeast University Nanjing 210096 China

Due to the deficiency of fluid-based (FB) P2P network model in dealing with the stream which could not be divided infinitely, a limitedly dividable stream-based (LDSB) model was studied and proposed for P2P streaming networks. A close-form expression of maximum universal streaming rate of LDSB model was given and proved in theory. The results of theoretical analysis and numerical calculation show that the maximum universal streaming rate of LDSB model can not be greater than that of FB model because of the limitation of minimum sub streaming rate. However, with the decrease of minimum sub streaming rate, the performance of LDSB model would approximate to FB model. In addition, by choosing appropriate system parameters such as minimum sub streaming rate and server upload rate, etc., the performance of LDSB system may reach the upper limit of FB model's theoretical performance, and unnecessary waste of resources in system deployment can be avoided.

关键词： Peer to peer networks

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MPMAC and its security analysis

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Beijing Gongye Daxue Xuebao / Journal of Beijing University of technology 2008年第SUPPL. 2期34卷 62-66页

作者： Zhang, Shao-Lan Yang, Yi-Xian Xing, Guo-Bo Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Network and Information Attack and Defense Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China School of Computer Science and Technology Shandong Jianzhu University Jinan 250101 China

According to the weakness of mode of operation, a modified parallelizable message authentication code (MPMAC) is proposed. The mode to process the last block of message is improved to avoid the forgery attack with random message by using the fact that the block cipher has same output with the same input using a key. Its security is proved by quantifying the advantage of distinguishing message authentication code from the random function in terms of the quality of the block cipher as a pseudo-random permutation.

关键词： Authentication

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Universally composable anonymous Hash certification model

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Science in China(Series F) 2007年第3期50卷 440-455页

作者： ZHANG Fan MA JianFeng SangJae MOON Key Laboratory of Computer Networks and Information Security (Ministry of Education) Xidian UniversityXi'an 710071 China Mobile Network Security Technology Research Center Kyungpook National University Sankyuk-dongBuk-ku Daeyu 702-701 Korea

Ideal function is the fundamental component in the universally composable security model. However, the certification ideal function defined in the universally composable security model realizes the identity authentication by binding identity to messages and the signature, which fails to characterize the special security requirements of anonymous authentication with other kind of certificate. Therefore, inspired by the work of Marten, an anonymous hash certification ideal function and a more universal certificate CA model are proposed in this paper. We define the security requirements and security notions for this model in the framework of universal composable security and prove in the plain model （not in the random-oracle model） that these security notions can be achieved using combinations of a secure digital signature scheme, a symmetrical encryption mechanism, a family of pseudorandom functions, and a family of one-way collision-free hash functions. Considering the limitation of wireless environment and computation ability of wireless devices, this anonymous Hash certification ideal function is realized by using symmetry primitives.

关键词： anonymous authentication Hash universal composable security

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Provable Efficient Certificateless Group key Exchange Protocol

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Wuhan University Journal of Natural Sciences 2007年第1期12卷 41-45页

作者： CAO Chunjie MA Jianfeng MOON Sangjae Key Laboratory of Computer Networks and InformationSecurity Ministry of Education Xidian University Xi＇ an 710071Shaanxi China Mobile Network Security Technology Research Center Kyungpook National University Daeyu 702701 Korea

Certificateless public key cryptography （CL-PKC） avoids the inherent escrow of identity-based cryptography and does not require certificates to guarantee the authenticity of public keys. Based on CL-PKC, we present an efficient constant-round group key exchange protocol, which is provably secure under the intractability of computation Diffie-Hellman problem. Our protocol is a contributory key exchange with perfect forward secrecy and has only two communication rounds. So it is more efficient than other protocols. Moreover, our protocol provides a method to design efficient constant-round group key exchange protocols and most secret sharing schemes could be adopted to construct our protocol.

关键词： group key exchange certificateless public key cryptography provable security bilinear pairings

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A Complex Virtual Screening Computing Platform Based on SOA

A Complex Virtual Screening Computing Platform Based on SOA

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IEEE Asia-Pacific Conference on Services Computing (APSCC)

作者： Pengfei Liu Shoubin Dong Yicheng Cao Zhengping Du Zhike Mao Communication and Computer Network Key Laboratory of Guangdong South China University of Technology Guangzhou China School of Bioscience and Bioengineering South China University of Technology Guangzhou China

Receptor-based virtual screening becomes more and more important in novel leads design in pharmaceutical industry. However, virtual screening technology is not mature enough and still growing with the dynamic development of related technology and science. So a flexible way to organize multiple biological algorithms and distributed chemical databases to fulfill virtual screening process is in great expect. Base on service-oriented architecture (SOA) and grid technology, we have developed a service oriented virtual screening platform that enables dynamic algorithms integrating. On which biological user can go from amino acid sequence to candidate drug hits without paying too much attention to the low-level operation, also the platform is easy to extend when new algorithms come. The receptor predicting accuracy is enhanced while effectively combining homology modeling and Ab initio method, this lead to virtual screening improvement. Through the performance test experiments, it is observed that SOA approach obtained a somewhat satisfying performance and demonstrates that SOA pattern's advantage highly surpass the performance overhead.

关键词： Semiconductor optical amplifiers Chemical technology Pharmaceutical technology Service oriented architecture Biology computing Chemical processes Distributed databases Heuristic algorithms Amino acids Drugs

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Research on Usage Control Model with Delegation Characteristics Based on OM-AM Methodology

Research on Usage Control Model with Delegation Characterist...

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IFIP International Conference on network and Parallel Computing Workshops (NPC Workshops)

作者： Zhiyong Zhang Lin Yang Qingqi Pei Jianfeng Ma Key Laboratory of Computer Network and Information Security Ministry of Education Xidian University Xi'an China Electron. Information Engineering Coll. Henan University of Science and Technology Luoyang China The Research Institute Renesas Technology Corporation Beijing China

UCON ABC is a basic framework of next generation access control policy Usage Control that is composed of Authorization-oBlige-Condition components, but so far it lacks of important delegation characteristic. The paper analyses the behaviors of delegation in UCON based on OM-AM engineering principles, presents a formalized usage control model with delegation features using BNF Extensions, called as UCON D , and further articulates its hybrid architecture based on Client & Server Delegation Reference Monitors and relative key protocol functions. UCON D is an extension model of UCON ABC in the aspect of delegation authorization, and it resolves the delegation question of Usage Control Model. Moreover, we specify delegation procedure of an application for Digital Medium Resource Distribution System.

关键词： Access control Information security Authorization Resource management Mechanical factors Access protocols Environmental management Design engineering Parallel processing Laboratories

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Architecture and implementation of parallel multiple structural alignment on the grid environment

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Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and technology (Natural Science Edition) 2007年第SUPPL. 2期35卷 72-75页

作者： Liu, Pengfei Dong, Shoubin Cao, Yicheng Du, Zhengping Communication and Computer Network Key Laboratory of Guangdong South China University of Technology Guangzhou 510640 China School of Bioscience and Bioengineering South China University of Technology Guangzhou 510640 China

This paper aims at the computing-intensive problem of multiple structural alignment. After conducting analysis on progressive pairwise alignment strategy that most of the popular multiple structural alignment based on, the paper design a parallel multiple structural alignment architecture and put it in practice. The experimental results show that this parallel architecture can obtain good results that greatly promote the computing efficiency and reusability. The parallelization method can provide helpful reference for other multiple structure alignment tools.

关键词： Grid computing

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New scheme of implementing real-time linux

New scheme of implementing real-time linux

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2006 International Conference on Software Engineering Advances, ICSEA'06

作者： Hong, Xue-Yu Zhang, Ling Hu, Jin-Long Guangdong Key Laboratory of Computer Network South China University of Technology Guangzhou 510640 China

ISBN: (纸本)0769527035

To well support the real-time requirement from applications, we enhance the real-time ability in Linux kernel through two new kernel mechanisms. Firstly, we present a new microsecond-level timer mechanism based on UTIME provided by Kurt-Linux, but different from it. The new timing implementation provides more flexible mechanism to support the different-grained timing requirement, as well as more flexible and preferential management of microsecond-level timers. Secondly, we present a new interrupt handler to reduce the kernel delay, which makes it possible scheduling interrupt handler with other processes under the system scheduler. Therefore, making interrupt routine under control is achieved. The experiments show that the improvements are distinct and significant. © 2006 IEEE.

关键词： computer operating systems

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