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International Conference on Embedded Software and Systems

作者： Yiliang Han Xiaoyuan Yang Yupu Hu Key Laboratory of Network and Information Security A.P.FDepartment of Electronic Technology Engineering College of A. P. F Xi'an China College of Computer Science Xidian University Xi'an China

An efficient scheme so called authenticated public key encryption that performs signature and encryption simultaneously is designed. The scheme is the first scheme that based on the standardized signature algorithm ECDSA and achieves both privacy and authenticity in the method of ECDLP which is the most practical cryptographic primitive in the future. The scheme saves 78%-82% computation costs in all. It also saves 14% storage costs for current security parameters and 9% storage costs for high level security in average. The saving is significant potentially, especially in power restricted applications such as embedded systems and mobile computing. Arguments show that the scheme is secure at present. Compared with RFC1421 and existed results, the scheme for multiple users also discussed.

关键词： Public key Elliptic curves Secure storage Costs Power system security Privacy Public key cryptography Elliptic curve cryptography Computational efficiency Embedded system

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Improving the quality of 3D-QSAR by using flexible-ligand receptor models

Improving the quality of 3D-QSAR by using flexible-ligand re...

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作者： Pei, Jianfeng Chen, Hao Liu, Zhenming Han, Xiaofeng Wang, Qi Shen, Bin Zhou, Jiaju Lai, Luhua State Key Laboratory for Structural Chemistry of Stable and Unstable Species College of Chemistry and Molecular Engineering Peking University Beijing 100871 China Center for Theoretical Biology Peking University Beijing 100871 China Computer Network Information Center Chinese Academy of Sciences Beijing 100080 China Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

To address the problems associated with molecular conformations and alignments in the 3D-QSAR studies, we have developed the Flexible Ligand - Atomic Receptor Model (FLARM) 2.0 method. The FLARM 2.0 method has three unique features as compared to other pseudoreceptor model methods: (1) the training ligands are flexibly optimized inside the receptors to achieve minimal docking energies;(2) the receptor atoms are spatially moveable in the process of genetic evolving in order to avoid improper initial receptor shapes;and (3) void receptor sites are specially favored in order to obtain open receptor models that allow large gaps. Advantages of an open model include less noise information, a smaller risk of overfitting, and ease of locating the key interaction sites. The latter two features, inherited from the previous FLARM 1.0 method, can improve the predictive ability of the 3D-QSAR models, while the first feature is newly implemented to relieve the uncertainty caused by improper conformation and alignment. Three FLARM 2.0 case studies were performed, and the results show that FLARM 2.0 models are highly predictive and robust. FLARM 2.0 pseudoreceptor models can correspond well with the pharmacophore models and/or the binding sites of the real protein receptors. © 2005 American Chemical Society.

关键词： Molecular dynamics

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An enhanced application-level multicast protocol: a QoS perspective

An enhanced application-level multicast protocol: a QoS pers...

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International Symposium on Parallel Architectures, Algorithms and networks (ISPAN)

作者： Zi Chu Yin-yin Yang Key Laboratory of Computer Network and Information Integration Ministry of Education South-East University Nanjing China Southeast University Nanjing Jiangsu CN Dept. of Comput. Sci. & Eng. Southeast Univ. Nanjing China

Ubicast, an enhanced application-level multicast protocol, is presented in this paper. It is built upon Pastry, a robust and self-organizing peer-to-peer substrate overlay, and leverages its merits of reliable application-level routing and object location. Ubicast is mainly applied to real-time multimedia applications with QoS heterogeneity. It tries to minimize the delay radius of the multicast tree, while meeting different bandwidth requirements. It extends traditional degree-bound model and satisfies nodes' heterogeneous QoS requirements to provide customizable multicast services. Besides, Priority Joining Algorithm based on the concept of potential parents is proposed to limit the number of nodes that a participant needs to probe. The join cost is decreased substantially to guarantee the scalability for a potentially large network topology. Simulation and experimental analysis over large-scale topology confirm the performance improvement of Ubicast which is especially suited for small sized multicast groups.

关键词： Multicast protocols Peer to peer computing network topology Robustness Routing Delay Bandwidth Multicast algorithms Probes Costs

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An approach to the formal verification of the three-principal cryptographic protocols

An approach to the formal verification of the three-principa...

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作者： Zhang, Yuqing Liu, Xiuying State Key Laboratory of Information Security GSCAS Beijing 100039 China National Computer Network Intrusion Protection Center GSCAS Beijing 100039 China

Based on the model checking theory, we derive the Running-Mode Analysis of three-principal cryptographic protocols from the Running-Mode Analysis of two-principal cryptographic protocols. To test this method, we analyze the Davis Swick protocol and successfully prove the security of this protocol. Therefore, we can draw a conclusion that Running-Mode Analysis of three-principal cryptographic protocol is available.

关键词： Cryptography

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Enhancing the content of the intrusion alerts using logic correlation

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Advanced Workshop on Content Computing, AWCC 2004

作者： Wang, Liang-Min Ma, Jian-Feng Zhan, Yong-Zhao The Key Laboratory of Computer Network and Information Security Xidian University Ministry of Education Xian710071 China The Computer School of Jiangsu Univ Zhenjiang212013 China

ISBN: (纸本)3540238980

To solve the problem of the alert flooding and information semantics in the existing IDS, the approach using the logic correction to enhance the content of the alerts is presented. The Chronicle based on time intervals is presented to describe the temporal time constrains among intrusion alerts, and the Chronicle patterns are designed to integrate the alerts of the sequence generated by an attacker into a high-level alert. Then the preparing relation between the high-level alerts is defined and the one-order logic algorithm is applied to correlate these high-level alerts with the preparing relationship. The attack scenario is constructed by drawing the attack graph. In the end an example is given to show the performance of this algorithm in decreasing the number and improving the information semantics of the intrusion alerts. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Semantics

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A risk assessment approach for network information system

A risk assessment approach for network information system

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Yong-Zheng Zhang Bin-Xing Fang Xiao-Chun Yun National Computer Information Content Security Key Laboratory Harbin Institute of Technology Harbin Heilongjiang China Research Center of Computer Network and Information Security Technology Harbin Institute of Technology Harbin Heilongjiang China

ISBN: (纸本)0780384032

Currently, risk assessment has been an effective technology of protecting network information system. In order to achieve more accurate result, a new assessment approach is presented in this paper. Our approach introduces the idea of network node correlation (NNC), and based on NNC, we give the conception and characteristic of risk propagation. Also, we design a quantitative taxonomy of network node, and describe the assessment process. Compared with other works, our approach more truly reflects the existence of the correlative risk.

关键词： Risk management information systems computer networks information security Taxonomy computer security National security Laboratories Electronic mail Protection

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An architecture for intrusion detection using honey pot

An architecture for intrusion detection using honey pot

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Zhi-Hong Tian Bin-Xing Fang Xiao-Chun Yun National Computer Information Content Security Key Laboratory Harbin Institute of Technology Harbin Heilongjiang China National Computer Network and Information System Security Administration Center Beijing China

ISBN: (纸本)0780378652

The most common shortcomings in the existing intrusion detection systems (IDSs) are information overload, unknown attacks, false positives and false negatives. We present the design of AAIDHP (an architecture for intrusion detection using honey pot). This approach solves the problems previously mentioned. As a component, the honey pot cooperates with IDS, which increases flexibility, configurability and security of IDS. We also present the definition of the honey pot, the description of this approach and a discussion of design and implementation issues.

关键词： Intrusion detection computer security information security Distributed computing Production Telecommunication traffic computer architecture computer networks Protection Laboratories

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The precaution of the network virus and the quantitative analysis of the epidemic situation

The precaution of the network virus and the quantitative ana...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Bai-Ling Wang Bin-Xing Fang Xiao-Chun Yun National Computer Information Content Security Key Laboratory Harbin Institute of Technology Harbin Heilongjiang China National Computer Network and Information System Security Administration Center Beijing China

ISBN: (纸本)0780378652

Comparing with the traditional host virus, the network virus has more attack ability and is more infectious in open network environment. So it is necessary to set a national virus precaution system to detect and control the network virus epidemic situation. In this paper, a distributed broadband network virus precaution model is introduced. It analyzes the data in the network and discovers the coming virus epidemic situation in time. The quantitative analysis of broadband network virus epidemic situation is given, too. According to the result, we can collect the scale, the speed and the direction of the epidemic situation. Consequently, we can establish effect control policy to reduce harm.

关键词： Internet computer networks Control systems Broadband communication computer security information security National security Distributed computing information analysis information systems

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Performance Evaluation of Modified IEEE 802.11 MAC for Multi-Channel Multi-Hop Ad Hoc networks

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Journal of Interconnection networks 2003年第3期4卷 345-359页

作者： Jiandong Li Zygmunt J. Haas Min Sheng Yanhui Chen Xidian University State Key Lab. of Integrated Service Network Xi'an Shaanxi 710071 P. R. China Cornell University School of Electrical and Computer Engineering Wireless Networks Laboratory Ithaca NY 14853 USA Xidian University Information Science Institute Xi'an Shaanxi 710071 P. R. China

In this paper, the IEEE 802.11 multiple access control (MAC) protocol was modified for use in multi-channel, multi-hop ad hoc networks through the use of a new channel-status indicator. In particular, in the modified protocol, the RTS/CTS dialogue is exchanged on the common access control channel and data packets are transmitted on a selected traffic channel. We have evaluated the improvement due to the multi-channel use and we report in this paper on the results of the per-node throughput and the end-to-end delay for different network sizes. Using these results, we were able to propose a number of per-node throughput scaling laws. Our simulation results show that the per-node throughput with multiple channels for the fully connected, the line, and the grid ad hoc network topologies increases by 90% to 253%, by 47%, and by 139% to 163%, respectively, for networks with 16 to 64 nodes, as compared with that of a single channel.

关键词： Ad hoc networks 802.11 multiple channel multiple access control protocol

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CARRIAGE: Fault tolerant CORBA system based on portable interceptors 2

CARRIAGE: Fault tolerant CORBA system based on portable inte...

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2nd International Workshop on Autonomous Decentralized System

作者： Zhang, Y Shen, ZW Wang, Y Department of Computer Science and Engineering The Key laboratory of Computer Network and Information Integrity Ministry of Education South-East University China

ISBN: (纸本)0780376242

Fault Tolerance requirement, which demands the reliability and consistency in compute systems, becomes a hot issue in current distributed object application field. Based on standardized Portable Interceptors mechanism, CARRIAGE system has successfully integrated ORB US, a CORBA implementation developed by the authors and EDEN, a fault-tolerant framework into a whole new Fault Tolerant CORBA system, which uses active replication style to enhance fault tolerance service in CORBA domain with low cost and high efficiency. Practice has identified that this software prototype conforms to the standard specification thoroughly and provides a feasible and convenient way to glue the legacy systems without modifying the original systems or the application programs either.

关键词： software reliability fault tolerant computing distributed object management software portability CARRIAGE fault tolerant CORBA system portable interceptors distributed object application ORBUS CORBA EDEN fault-tolerant framework active replication style software prototype legacy systems

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