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Defense Against Objective Function Attacks in Cognitive Radio networks

电子学报(英文版) 2011年第1期20卷 138-142页

作者： PEI Qingqi LI Hongning MA Jianfeng FAN Kefeng Ministry of Education Key Laboratory of Computer Network and Information Security Xidian University Xi'an China Institute of China Electronic System Engineering Corporation Beijing China China Electronics Standardization Institute Beijing China

Cognitive radio (CR) is a technology for identifying opportunities using the "spectrum holes" for communication by cognition. Consequently, we can in- crease spectrum resource utilization rate with CR. How- ever, it is cognition that causes an unprecedented chal- lenge for cognitive radio networks, especially in security performance. Based on security problems existing in cog- nitive radios, we analyze Objective function attacks in de- tail. To counter this attack, we propose a multi-objective programming model, called MOP, which verifies all param- eters tampered, so that attackers can not prevent CR from adapting to surroundings. Our simulation results indicate that the MOP model can defend Objective function attacks effectively. Thus, with the MOP model based on Particle swarm optimization (PSO), cognitive radio networks will obtain the optimum condition.

关键词：无线电网络防御功能多目标规划模型认知无线电频谱资源安全性能目标函数粒子群优化

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miRDeathDB: a database bridging microRNAs and the programmed cell death

miRDeathDB: a database bridging microRNAs and the programmed...

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第五届全国生物信息学与系统生物学学术大会

作者： Jianzhen Xu Yan-Hui Li College of Bioengineering Henan University of Technology Zhengzhou China 450001 Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences Ministry of Education Peking University Health Science Center 38 Xueyuan Road Haidian District Beijing China 100191 Scientific Data Center Computer Network Information Center Chinese Academy of SciencesBeijing China 100190

Background: MicroRNAs (miRNAs) are a class of small non-coding RNAs, which negatively regulate protein coding genes at the posttranscriptional *** tiny regulators have been associated to almost all known physiological and pathological *** defects in miRNAs have been implicated in the etiology of many forms of human ***, autophagy and programmed necrosis are three distinct yet intimately connected functional modules of programmed cell death (PCD).In the past few years, increasing evidences suggested that aberrant expression of miRNAs regulate different subroutines of *** the roles of miRNAs in PCD network has attracted interests of researchers from a wide range of ***, a knowledge depository, which integrates information for both miRNAs and their targets in PCD network, will be of great ***: Based on PubMed search, we firstly collected literatures which reported the roles of miRNAs in PCD before April ***, these literatures were inspected manually and the miRNAs and their targets genes were *** criterion for selecting PCD associated miRNAs in miRDeathDB is *** morphological or biochemical data should be provided when the miRNAs (or their targets) are manipulated in cell death *** miRDeathDB (http://***/mirdeathdb/) was developed, which allows users to browse, search and analyze the PCD associated ***: In total, 210 records covering 86 miRNAs and 95 protein coding genes were collected in five model species: humans (Homo sapiens), mice (Mus musculus), fruit flies (Drosophila melanogaster), rat (Rattus norvegicus) and African frog (Xenopus tropicalis).Users can search the database for both miRNAs and protein coding entries based on principal *** addition, users can browse and obtain full lists of miRNAs involved in PCD for any given *** data can be freely downloaded or accessed via our website for academic ***: miRDe

关键词： microRNAs apoptosis autophagy necrosis

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Traffic classification based on port connection pattern

Traffic classification based on port connection pattern

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International Conference on computer Science and Service System (CSSS)

作者： Guang Cheng Song Wang School of Computer Science & Engineering Key Laboratory of Computer Network and Information Integration Ministry of Education Key Laboratory of Computer Network Technology of Jiangsu South-East University Nanjing China

ISBN: (纸本)9781424497621

While the traditional Web, Email and other Internet applications are still used large-scale, Internet applications, such as typical P2P resource sharing, streaming, games, instant messaging and other new applications emerging, is generating the rapid growth traffic. Connection pattern approach is to observe and identify connection patterns of host behavior at the transport layer. This method has no access to packet payload, no knowledge of port numbers and no additional information other than what current flow collectors provide. But traffic classification method based on host connection pattern can't distinguish some similar applications provided by one server. This paper analyzes the connection pattern between servers for SMTP, POP3, Web, BT traffic, and the distribution of simultaneous connections for each server port, and then propose a new traffic classified approach based on port connection pattern and the simultaneous connection number. The classified method can distinguish WEB, SMTP, POP3, and BT traffic each port in a server without any knowledge of port. The experimental result shows that this method is effective.

关键词： Electronic mail IP networks Joining processes Classification algorithms Web servers

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Message redundancy removal of multi-copy routing in delay tolerant MANET

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The Journal of China Universities of Posts and Telecommunications 2011年第1期18卷 42-48页

作者： YU Hai-zheng MA Jian-feng BIAN Hong Key Laboratory of Computer Network and Information Security Xidian University Xi'an 710071 China College of Mathematics and System Sciences Xinjiang University Urumqi 830046 China School of Mathematical Sciences Xinjiang Normal University Urumqi 830054 China

This article puts forward a new scheme to control message redundancy efficiently in delay tolerant mobile Ad-hoc networks （MANET）. The class of networks generally lacks end-to-end connectivity. In order to improve the efficiency that messages are delivered successfully, multiple message copies routing protocols are usually used, but the network load is increased due to a large number of message redundancies. In the study, by using counter method, every node adds an encounter counter based on epidemic routing scheme. The counter records the number which the node encounters other nodes with the same message copy. If the counter of a node reaches tbe installed threshold, the node removes the copy. Theoretical analysis gives a lower bound of threshold in delay tolerant MANET. According to the lower bound of threshold, a rational threshold is installed in real environment. With proposed scheme message copies decrease obviously and are removed completely finally. The successful delivery efficiency is still the same as epidemic routing and the redundant copies are efficiently controlled to a relatively low level computer simulations give the variation of message copies concerning different thresholds in fast and slow mobility scenes.

关键词： delay tolerant networks mobile Ad-hoc networks message routing redundancy removal

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Performance Analysis for Intrusion Target Detection in Wireless Sensor networks

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电子学报(英文版) 2011年第4期20卷 725-729页

作者： FAN Gaojuan WANG Ruchuan HUANG Haiping SUN Lijuan XIAO Fu College of Computer Nanjing University of Posts and Telecommunications Nanjing Chin School of Computer and Information Engineering Henan University Kaifeng China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology (Nanjing University of Posts and Telecommunications) Ministry of Education of Jiangsu Province Nanjing China

Target detection and field surveillance are among the most prominent applications of wireless sensor networks. The quality of detection achieved by a sensor network can be quantified by evaluating the probability of detecting a mobile target crossing a sensing field. Detection probability of sensor nodes has been studied in sensor networks for many purposes such as quality of service and decision making. However, the sensing capabilities of sensors are affected by environmental factors in real deployment. This paper investigates the problem of detecting probability in a log-normal shadow fading environment. It presents an analytic method to evaluate the detection probability by at least k sensors under practical considerations. Furthermore, we also shows that shadow fading makes significant influence in detection probability compared to unit disk sensing model through extensive simulation experiments.

关键词：无线传感器网络目标检测性能分析入侵检测概率环境因素阴影衰落传感器节点

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A two-stage composite heuristic for dual cycling quay crane scheduling problem

A two-stage composite heuristic for dual cycling quay crane ...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Dandan Wang Xiaoping Li Qian Wang School of Computer Science & Engineering Key Laboratory of Computer Network and Information Integration Ministry of Education Southeast University Nanjing China

In this paper, hatch constrained quay crane scheduling problem is considered to minimize makespan with dual cycling, which can improve efficiency of operations and utilization of quay cranes. By analyzing precedence relationships intra- and inter- hatches, the problem is decomposed into two embedded sub-problems, each of which can be formulated as a 2-machine flow shop scheduling problem. A composite heuristic is introduced for stacks scheduling in a hatch by integrating the Johnson rule with a developed gap-shifting strategy. A better model is constructed for inter-hatches than existing ones, in which overlapped processing time is shorten and effectiveness can be improved by a reconstructive Johnson rule. Experimental results show that the proposed composite algorithm outperforms the existing hybrid heuristic.

关键词： Cranes Loading Containers Schedules Heuristic algorithms Proposals Optimized production technology

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L-WMxD: Lexical based Webmail XSS Discoverer

L-WMxD: Lexical based Webmail XSS Discoverer

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2011 IEEE Conference on computer Communications Workshops, INFOCOM WKSHPS 2011

作者： Tang, Zhushou Zhu, Haojin Cao, Zhenfu Zhao, Shuai Department of Computer Science and Engineering Shanghai Jiao Tong University China Key Laboratory of Information Network Security Ministry of Public Security China

ISBN: (纸本)9781457702488

XSS (Cross-Site Scripting) is a major security threat for web applications. Due to lack of source code of web application, fuzz technique has become a popular approach to discover XSS in web application except Webmail. This paper proposes a Webmail XSS fuzzer called L-WMxD (Lexical based Webmail XSS Discoverer). L-WMxD , which works on a lexical based mutation engine, is an active defense system to discover XSS before the Webmail application is online for service. The engine is initialized by normal JavaScript code called seed. Then, rules are applied to the sensitive strings in the seed which are picked out through a lexical parser. After that, the mutation engine issues multiple test cases. Newly-generated test cases are used for XSS test. Two prototype tools are realized by us to send the newly-generated test cases to various Webmail servers to discover XSS vulnerability. Experimental results of L-WMxD are quite encouraging. We have run L-WMxD over 26 real-world Webmail applications and found vulnerabilities in 21 Webmail services, including some of the most widely used Yahoo!Mail, Mirapoint Webmail and ORACLE' Collaboration Suite Mail. © 2011 IEEE.

关键词： Engines

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Three-mobile-beacon assisted weighted centroid localization method in wireless sensor networks

Three-mobile-beacon assisted weighted centroid localization ...

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2011 IEEE 2nd International Conference on Software Engineering and Service Science, ICSESS 2011

作者： Cui, Huan-Qing Wang, Ying-Long Lv, Jia-Liang Mao, Yu-Ming College of Information Science and Engineering Shandong University of Science and Technology Qingdao China Shandong Provincial Key Laboratory of Computer Network Shandong Computer Science Center Jinan China

ISBN: (纸本)9781424496969

Localization is one of the key technologies in wireless sensor networks, and the mobile beacon assisted localization method is promising to reduce the cost. The methods with only one beacon introduce collinearity problem which degrades performance. This paper proposes a weighted centroid localization method using three mobile beacons. These beacons preserve a special formation while traversing the network deployment area, and broadcast their positions periodically. The sensor nodes to be localized estimate the distances to these beacons, and utilize weighted centroid localization scheme to calculate its position. Simulation shows that this method is superior to trilateration and weighted centroid algorithm with single mobile beacon. © 2011 IEEE.

关键词： Sensor nodes

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A dynamic resource allocation algorithm for database-as-a-service

A dynamic resource allocation algorithm for database-as-a-se...

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2011 IEEE 9th International Conference on Web Services, ICWS 2011

作者： Zhu, Jie Gao, Bo Wang, Zhihu Reinwald, Berthold Guo, Changjie Li, Xiaoping Sun, Wei School of Computer Science and Engineering Southeast University 210096 Nanjing China Key Laboratory of Computer Network and Information Integration Ministry of Education China IBM Research-China 100193 Beijing China IBM Almaden Research Center 650 Harry Road San Jose CA 95120 United States

ISBN: (纸本)9780769544632

In Database-as-a-Service (DBaaS), a large number of tenants share DBaaS resources (CPU, I/O and Memory). While the DBaaS provider runs DBaaS to "share" resources across the entire tenant population to maximize resource utilization and minimize cost, the tenants subscribe to DBaaS at a low price point while still having resources conceptually "isolated" according to service level agreements (SLAs). To optimize this dichotomy of goals, we propose a dynamic resource allocation framework that periodically re-allocates resources to tenants to maximize resource utilization while tolerating a low risk of SLA violations. We model the resource allocation problem as a modified unbounded knapsack problem. The model introduces an additional fairness constraint to assign residual resources to active tenants, while avoiding that few tenants consume all residual resources. Performed experiments demonstrate the effectiveness and efficiency of the proposed allocation algorithm for a synthetic workload with burstiness and predicted tenant behavior. © 2011 IEEE.

关键词： Combinatorial optimization

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Knowledge discovery from noisy datasets

Knowledge discovery from noisy datasets

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2011 International Conference on Automation and Robotics, ICAR 2011

作者： Li, Hong Zong, Yu Chen, Enhong Key Laboratory of Network and Intelligent Information Processing Department of Computer Science and Technology Hefei University 230001 China School of Computer Science and Technology University of Science and Technology of China 230001 China

ISBN: (纸本)9783642256455

It is a significant challenges to deal with the noise data in data mining and knowledge discovery applications. Most of previous works on data cleansing and correction have been focused on addressing class noise or attribute noise for the benefit of the subsequent mining process. In this paper, we propose an error-sensitive(ES) data mining framework, which makes use of noise knowledge to restore original data distributions and accommodates noise knowledge to enhance data classification accuracy. We materialize our main idea by constructing Attribute-Decision tree and measureing correlation among attributes. Experimental results show that ES data mining procedure has ability to significantly improve the quality of data mining results. © 2011 Springer-Verlag.

关键词： Classification (of information)

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