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Access control architecture design issues in enterprise collaborative environment

Access control architecture design issues in enterprise coll...

引用

International Conference on Management and Service Science, MASS 2009

作者： Xiangrong, Zu Lianzhong, Liu Ruzhi, Xu Computer Sci. and Tech. Dept. North China Electric Power University Beijing 102206 China Key Laboratory of Beijing Network Technology School of Computer Sci.and Engineering Beihang University Beijing 100191 China

ISBN: (纸本)9781424446391

Enterprise collaborative systems often focus on building useful connections among people, tools, and information, access control is particularly important in the environment. This paper is concerned with enterprise access control architecture design issues. Firstly, this paper examines RBAC and TBAC models and analysis their benefits and weaknesses in application, and introduces an improved role and task-based access control model that mixed the two model benefits. Secondly, this paper applies object-oriented method to specify the model security policy elements, and design an organization-based role and resources management mechanism, especially on dynamic role administration of collaborative project as a virtual organization unit where TBAC applied. Finally, this paper presents a hierarchical access control architecture, that can facilitate administrators to specify and enforce security policy in hierarchical strategy. ©2009 IEEE.

关键词： Security systems

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Access model of web users based on multi-chains hidden Markov models

Access model of web users based on multi-chains hidden Marko...

引用

作者： Zheng, Kangfeng Yang, Yixian Wang, Xiujuan Guo, Shize Key Laboratory of Network and Information Attack and Defence Technology MOE Beijing University of Posts and Telecommunications Beijing China College of Computer Sciences Beijing University of Technology Beijing China No. 54 Research Institute of the General Staff PLA Beijing China

ISBN: (纸本)9780769540276

How to distinguish abnormal access from normal ones is the key problem in Distribution Denial of service(DDoS) attack detection. This research aims at finding out the major difference between the abnormal access and the normal ones in application layer. To this end , the paper conducts modeling on Web users' access behaviors based on hidden Markov model(HMM) with multiple chains and puts forward a method to identify abnormal access. Tests on simulation data indicate that this model can undo Web users access to a certain degree and discern the abnormal access well. © 2010 IEEE.

关键词： Hidden Markov models

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A Logging Scheme for Database Audit

A Logging Scheme for Database Audit

引用

International Workshop on computer Science and Engineering (WCSE)

作者： Qiang Huang Lianzhong Liu School of Computer Science and Engineering Key Laboratory of Beijing Network Technology Beihang University Beijing China

Database audit can strengthen the security of database. Logging database activities is usually the first step of implementing database audit. In this paper, we present a logging scheme for database audit. Unlike native database logging and auditing mechanism, our scheme is to monitor and log database activities through analyzing network traffic. The architecture of our scheme contains three principal components: packets capturing, packets parsing and data storage. First capture the packets to and from the database; then, by analyzing database communication protocols, parse the captured packets; finally, use the parsed results to support database audit.

关键词： Data security Monitoring Relational databases Data analysis Database systems Spatial databases Telecommunication traffic computer science Data engineering Protocols

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A Framework for Database Auditing

A Framework for Database Auditing

引用

International Conference on computer Sciences and Convergence Information technology (ICCIT)

作者： Lianzhong Liu Qiang Huang School of Computer Science and Engineering Key Laboratory of Beijing Network Technology Beihang University Beijing China

ISBN: (纸本)9781424452446

Database auditing can help strengthen the security of database. In this paper, we present a framework of database auditing, which log the database activities through analyzing network traffic, execute audit analysis through event correlation and generate alarms if an anomaly or a violation of security regulations is detected. Compared with native auditing mechanism in database, our approach has an obvious advantage of providing zero-impact to the performance of the database or the applications that access it. In addition, using third-party auditing component complies with the principle of separation of duties.

关键词： Data security Monitoring Information security Spatial databases Telecommunication traffic Relational databases Database systems Access control Data engineering Data analysis

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Bloom Filter Based Index for Query over Encrypted Character Strings in Database

Bloom Filter Based Index for Query over Encrypted Character ...

引用

computer Science and Information Engineering, CSIE, WRI World Congress on FLAGGED

作者： Lianzhong Liu Jingfen Gai Key Laboratory of Beijing Network Technology School of Computer Science and Engineering Beihang University Beijing China

It is important to construct more efficient index used for query over encrypted character strings in database. A few of approaches to deal with such issues have been worked out. In this paper, an bloom filter based index to support fuzzy query over encrypted character data is proposed on the principle of two-phase query. Firstly a triple is used to express a character string, then we use bloom filter compression algorithm on this triple to build encoded index, which will be saved in database as a numeric data. Optimal parameters are selected with the tradeoff between security and efficiency. In this way, the scheme minimizes not-match records by simple bit-and operation on the numeric index. Finally the improved query performance is proofed by experiment result.

关键词： Filters Indexes Cryptography Databases Data security computer science Data engineering Matrix converters Space technology Information systems

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A real-time scheduling algorithm for industrial communication

A real-time scheduling algorithm for industrial communicatio...

引用

IEEE International Conference on Intelligent Computing and Intelligent Systems (ICIS)

作者： Ming Tan Zhen Wei School of Computer and Information Key Laboratory of Network and Intelligent Information Processing Hefei University of Technology Hefei China

ISBN: (纸本)9781424447374;9781424447541

To overcome the drawback that switched Ethernet does not guarantee the timely delivery of real-time messages in industrial communication, an improved FTT (flexible time-triggered communication) paradigm was proposed for hard real-time communications of periodic messages on switched Ethernet. In addition, an optimization condition for feasibility check of periodic messages was given. Particularly, we proposed an EDF-based algorithm to schedule periodic messages to be transmitted within their deadlines over COTS switched Ethernet running in the cut-through mode. Simulation results showed the advantages of the proposed real-time scheduling algorithm in terms of using the aggregated switch throughput.

关键词： Scheduling algorithm Communication industry Ethernet networks Communication switching Job shop scheduling Switches Protocols Processor scheduling Throughput Traffic control

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Policy-driven autonomic network resource management for observation and detection data communication

Policy-driven autonomic network resource management for obse...

引用

2009 International Conference on High Performance Computing, networking and Communication Systems, HPCNCS 2009

作者： Feng, Jing Ma, Weijun Liu, Dawei Yu, Xiaoxing Institute of Meteorology PLA University of Science and Technology Nanjing 211101 China Key Laboratory of Computer Network and Information Integration Ministry of Education Southeast University Nanjing 210096 China School of Information Science and Engineering Southeast University Nanjing 210096 China

ISBN: (纸本)9781615676606

The increase of the business and management complexity requires more adaptive and higher selfmanaged equipments, application processes and management systems, which promotes the development of autonomic computing and communication networks. The meteorological and hydrological business system (MHBS) is a typical composite functional system, which includes data collecting, transporting, convergence and clean up, distributing and publishing, pre-processing, storage, and weather forecasting. In order to realize self-management of MHBS, autonomic concept is introduced and autonomic network management architecture with associated model is proposed firstly. According to the measured data from observation and / or detection devices, the system may perceive the work situations of these devices by means of prediction models. Driven by a set of system management polices, some well-defined events can be processed, which enable generating configuration and adjustment suggestions automatically. The instances of policy-driven data communication management with multiple channels are given literally to show the model's mechanisms.

关键词： Weather forecasting

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A static method for detection of information theft malware

A static method for detection of information theft malware

引用

2nd International Symposium on Electronic Commerce and Security, ISECS 2009

作者： Li, JiaJing Wei, Tao Zou, Wei Mao, Jian Key Laboratory of Network and Software Security Assurance Ministry of Education Peking University Beijing 100871 China Institute of Computer Science and Technology Peking University Beijing 100871 China Department of Electronic and Information Engineering BeiHang University Beijing 10083 China

ISBN: (纸本)9780769536439

Existing techniques based on behavior semantics for information theft malware detection have the main shortcomings of low path coverage and disability of finding hidden malicious behaviors. In this paper we propose a static method for the detection of information theft malware to overcome these shortcomings. It is particularly efficienct for inter-procedure taint analysis, and it is suitable for complicated malware detection, such as Trojan and Bot. Its static style makes it able to find hidden malicious behaviors. We also present an implementation of our method that works on x86 executables and a set of experimental studies validate its good efficiency and effectiveness. © 2009 IEEE.

关键词： Malware

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An efficient mesh simplification algorithm

An efficient mesh simplification algorithm

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作者： Wang, Hailing Yin, Guisheng Zhang, Jing Wang, Decai Wang, Jian National Defence Key Laboratory of Autonomous Underwater Vehicle Technology Harbin Engineering University Harbin Heilongjiang 150001 China College of Computer Science and Technology Harbin Engineering University Harbin Heilongjiang 150001 China Network and Information Center Harbin Engineering University Harbin Heilongjiang 150001 China

ISBN: (纸本)9780769540276

This paper presents a new mesh simplification algorithm based on edge collapse, it combines surface curvature and quadric error metric, the position of a new vertex for edge collapse depends on multiple-weighted approach. The new algorithm can improve simplification rationality in procedure and preserve important features after simplification. In an addition, we do some experiments with comparing different simplified models, the results show that the new algorithm not only maintains the overall appearance for models, but also obtains better effectiveness. © 2010 IEEE.

关键词： Graphic methods

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RESEARCH AND IMPLEMENTATION ON SNORT-BASED HYBRID INTRUSION DETECTION SYSTEM

RESEARCH AND IMPLEMENTATION ON SNORT-BASED HYBRID INTRUSION ...

引用

2009 International Conference on Machine Learning and Cybernetics(2009机器学习与控制论国际会议)

作者： YU-XIN DING MIN XIAO AI-WU LIU Key Laboratory of Network Oriented Intelligent Computation Department of Computer Sciences and Technology Harbin Institute of Technology Shenzhen Graduate SchoolChina

Since most of current intrusion detection systems (IDS) only use one of the two detection methods, misused detection or anomaly detection, both of them have their own limitations. In this paper, the technique that combines misuse detection system with anomaly detection system (ADS) is used. The hybrid intrusion detection system (HIDS) contains three sub-modules, misused detection module, anomaly detection module and signature generation module. The basis of misused detection module is snort. Anomaly detection module is constructed by using frequent episode rule. And signature generation module is based on a variant of Apriori algorithm. Misused detection module uses the signature of attacks to detection the known attacks. Anomaly detection module can detect the unknown attacks and signature generation module extracts the signature of attacks that are detected by ADS module, and maps the signatures into snort rules.

关键词： IDS hybrid intrusion detection system Frequent episode rule Snort

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