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International Conference on network-Based information systems

作者： Lee, Sun-Ho Yim, Kang-Bin Lee, Im-Yeong Division of Computer Science Soonchunhyang Univ. Asan City Korea Republic of Dept. of Information Security Engineering Soonchunhyang Univ. Asan City Korea Republic of

ISBN: (纸本)9780769541679

The portable storage market environment is rapidly changing due to the emergence of USB memory. USB memory is used as a portable storage device by many users. However, due to the high portability of USB memory, USB sticks are frequently lost and stolen. In this Paper we suggest a secure user authentication method in which it is hard to guess the password and bypass authentication. In addition, security and efficiency are provided through a user authentication password backup and recovery mechanism to access the secure area. © 2010 IEEE.

关键词： Authentication

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An energy-efficient chain-based routing protocol in Wireless Sensor network

An energy-efficient chain-based routing protocol in Wireless...

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2010 International Conference on computer Application and System Modeling, ICCASM 2010

作者： Yu, Yongchang Song, Yichang Data Communication Research Dept. Guangzhou Research Institute China Telecom Co. Ltd. Guangzhou China Guangzhou Branch Computer Network and Information Security Center of China Guangzhou China

ISBN: (纸本)9781424472369

Nodes in Wireless Sensor network (WSN) are energy-constrained and have limited bandwidth. PEGASIS (Power-Efficient Gathering in Sensor information systems) presented in [1] is an excellent solution on energy efficiency where each node communicates only with a close neighbor and takes turns transmitting to the BS (Base Station). In this paper, we propose EECB (Energy-Efficient Chain-Based routing protocol) that is an improvement over PEGASIS. EECB uses distances between nodes and the BS and remaining energy levels of nodes to decide which node will be the leader that takes charge of transmitting data to the BS. Also, EECB adopts distance threshold to avoid formation of LL (Long Link) on the chain. Our analysis and simulation results show that EECB outperforms PEGASIS in the lifetime of WSN. © 2010 IEEE.

关键词： Energy efficiency

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An agent-based cooperative communication method in wireless sensor network for port logistics

An agent-based cooperative communication method in wireless ...

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2010 13th International Conference on computer and information Technology, ICCIT 2010

作者： Gou, Haosong Uddin, Md. Kafil Hossen, Muhammad Kamal Department of Computer Engineering Pusan National University Busan 609-735 Korea Republic of College of Computer Science and Information Systems Najran University Najran-1988 Saudi Arabia Dept. of Computer Science and Engineering Chittagong Univ. of Engineering and Technology Chittagong-4349 Bangladesh

ISBN: (纸本)9781424484973

Cooperative communication has been considered as a promising method for benefiting the advantages from MIMO (multiple-input multiple-output) system for single antenna mobiles in the wireless network, and many important milestones in this area have been achieved, leading to a flurry of research activity. Especially, cooperative communication in wireless sensor networks (WSNs) has gained so much interest due to the limitations of WSNs. This paper proposes a new cooperative communication method for WSNs in port logistics according to the observation of real application in port. In our proposed method, we use some fixed agents to help the sensor nodes to gain more efficient communication in the network. The simulation results and analysis show that our method achieves a good performance in enhancing the transmission and energy efficiency, resulting in improvement of the communication performance of the whole network. ©2010 IEEE.

关键词： Cooperative communication

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Performance analysis of PingPong-128 keystream generator for wireless sensor networks

Performance analysis of PingPong-128 keystream generator for...

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5th International Conference on computer Sciences and Convergence information Technology, ICCIT 2010

作者： Kumar, Pardeep Salam, Md. Iftekhar Reza, Ahmed Galib Lim, Hyo Taek Lee, Hoon Jae Dept. of U- IT Graduate School of Design and IT Dongseo University Busan Korea Republic of Division of Computer and Information Network Engg. School of Internet Engineering Dongseo University Busan 617-716 Korea Republic of

ISBN: (纸本)9788988678299

In this paper, we quantify the performance analysis of PingPong-128 keystream generator for wireless sensor networks. Although, PingPong-128 is not a standard stream cipher but still PingPong-128 keystream generator is an idea for resource constrained WSNs and can be widely used in the applications of secure communication, where the communication nodes have limited computation processing and storage capabilities while requiring sufficient levels of security. We present a performance comparison of PingPong- 128 with other stream ciphers selected in European Project Ecrypt called eSTREAM project, namely Dragon, HC-128, and Rabbit. Apart from that, we are also considering RC-4 stream ciphers for comparison with pingpong-128 for wireless sensor networks.

关键词： Wireless sensor networks

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Voice communications over 802.11 Ad Hoc networks: Modeling, optimization and call admission control

Voice communications over 802.11 Ad Hoc networks: Modeling, ...

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作者： Xu, Changchun Xu, Yanyi Liu, Gan Liu, Kezhong Computer Network Center Naval University of Engineering China Wuhan Natl. Lab. Optoelect. Dept. of Electronics and Information Engineering Huazhong University of Science and Technology Wuhan 430074 China School of Navigation Wuhan University of Technology China

Supporting quality-of-service (QoS) of multimedia communications over IEEE 802.11 based ad hoc networks is a challenging task. This paper develops a simple 3-D Markov chain model for queuing analysis of IEEE 802.11 MAC layer. The model is applied for performance analysis of voice communications over IEEE 802.11 single-hop ad hoc networks. By using the model, we finish the performance optimization of IEEE MAC layer and obtain the maximum number of voice calls in IEEE 802.11 ad hoc networks as well as the statistical performance bounds. Furthermore, we design a fully distributed call admission control (CAC) algorithm which can provide strict statistical QoS guarantee for voice communications over IEEE 802.11 ad hoc networks. Extensive simulations indicate the accuracy of the analytical model and the CAC scheme. Copyright © 2010 The Institute of Electronics.

关键词： Ad hoc networks

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Fine-grained data access control systems with user accountability in cloud computing

Fine-grained data access control systems with user accountab...

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2nd IEEE International Conference on Cloud Computing Technology and Science, CloudCom 2010

作者： Li, Jin Zhao, Gansen Chen, Xiaofeng Xie, Dongqing Rong, Chunming Li, Wenjun Tang, Lianzhang Tang, Yong School of Computer Science and Educational Software Guangzhou University China School of Computer Science South China Normal University China Key Laboratory of Computer Networks and Information Security Xidian University China Dept. of Electrical Engineering and Computer Science Stavenger University Norway School of Software Sun Yat-sen University China

ISBN: (纸本)9780769543024

Cloud computing is an emerging computing paradigm in which IT resources and capacities are provided as services over the Internet. Promising as it is, this paradigm also brings forth new challenges for data security and access control when users outsource sensitive data for sharing on cloud servers, which are likely outside of the same trust domain of data owners. To maintain the confidentiality of sensitive user data against untrusted servers, existing work usually apply cryptographic methods by disclosing data decryption keys only to authorized users. However, in doing so, these solutions inevitably introduce heavy computation overhead on the data owner for key distribution and data management when fine-grained data access control is desired, and thus do not scale well. In this paper, we present a way to implement scalable and fine-grained access control systems based on attribute-based encryption (ABE). For the purpose of secure access control in cloud computing, the prevention of illegal key sharing among colluding users is missing from the existing access control systems based on ABE. This paper addresses this challenging open issue by defining and enforcing access policies based on data attributes and implementing user accountability by using traitor tracing. Furthermore, both the user grant and revocation are efficiently supported by using the broadcast encryption technique. Extensive analysis shows that the proposed scheme is highly efficient and provably secure under existing security models. © 2010 IEEE.

关键词： Access control

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Fluctuated peer selection policy and its performance in large-scale multi-agent systems

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Web Intelligence and Agent systems 2010年第3期8卷 255-268页

作者： Sugawara, Toshiharu Fukuda, Kensuke Hirotsu, Toshio Sato, Shin-Ya Akashi, Osamu Kurihara, Satoshi Dept. of Computer Science and Engineering Waseda University Shinjuku Tokyo 169-8555 Japan National Institute of Informatics Chiyoda Tokyo 101-8430 Japan NTT Network Innovation Laboratories Musashino Tokyo 180-8585 Japan Faculty of Information Science Hosei University Koganei Tokyo 184-8584 Japan Institute of Scientific and Industrial Research Osaka University Osaka 567-0047 Japan

This paper describes how, in large-scale multi-agent systems, each agent's adaptive selection of peer agents for collaborative tasks affects the overall performance and how this performance varies with the workload of the system and with fluctuations in the agents' peer selection policies (PSP). An intelligent agent in a multi-agent system (MAS) often has to select appropriate agents to assign tasks that cannot be executed locally. These collaborating agents are usually chosen according to their skills. However, if multiple candidate peer agents still remain a more efficient agent is preferable. Of course, its efficiency is affected by the agent' workload and CPU performance and the available communication bandwidth. Unfortunately, as no agent in an open environment such as the Internet can obtain such data from any other agent, this selection must be done according to the available local information about the other known agents. However, this information is limited, usually uncertain and often obsolete. Agents' states may also change over time, so the PSP must be adaptive to some extent. We investigated how the overall performance of MAS would change under adaptive policies in which agents selects peer agents using statistical/reinforcement learning. We particularly focused on mutual interference for selection under different workloads, that is, underloaded, near-critical, and overloaded situations. This paper presents simulation results and shows that the overall performance of MAS highly depends on the workload. It is shown that when agents' workloads are near the limit of theoretical total capability, a greedy PSP degrades the overall performance, even after a sufficient learning time, but that a PSP with a little fluctuation, called fluctuated PSP, can considerably improve it. © 2010 - IOS Press and the authors. All rights reserved.

关键词： Multi agent systems

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On the use of compressed DFAs for packet classification

On the use of compressed DFAs for packet classification

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IEEE International Workshop on computer-Aided Modeling, Analysis, and Design of Communication Links and networks, CAMAD

作者： Gianni Antichi Andrea Di Pietro Stefano Giordano Gregorio Procissi Domenico Ficaray Fabio Vitucci Dept. of Information Engineering Univ. of Pisa Italy Cisco Systems International srl Switzerland Wireless Integrated Network srl Italy

The process of categorizing packets into flows in an Internet router is called packet classification. All packets belonging to the same flow obey a predefined rule and are processed in a similar manner by the router itself. For example, all packets with the same destination IP address and protocol may be defined as a flow. Packet classification is the foundation of many Internet functions such as Quality of Service enforcement, monitoring applications, security, and so on. This paper presents a novel classification scheme designed for NetFPGA boards which takes advantage of a very compressed version of Deterministic Finite Automata (DFA) in order to process packets at line rate.

关键词： Doped fiber amplifiers Automata Random access memory Hardware IP networks Memory management Routing protocols

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Optimizing pervasive sensor data acquisition utilizing missing values substitution 10

Optimizing pervasive sensor data acquisition utilizing missi...

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3rd International Conference on PErvasive Technologies Related to Assistive Environments, PETRA 2010

作者： Michalopoulos, M. Maglogiannis, Ilias Anagnostopoulos, C. Doukas, Charalampos Hadjiefthymiades, S. Faculty of Informatics Hellenic Open University Greece University of Central Greece Dep. of Computer Science and Bioinformatics Lamia Greece Dept. of Informatics and Telecommunications University of Athens Ilissia Athens Greece University of the Aegean Dep. of Information and Communication Systems Engineering Samos Greece

ISBN: (纸本)9781450300711

Acquisition of pervasive sensor data can be often unsuccessful due to power outage at nodes, time synchronization issues, interference, network transmission failures or sensor hardware issues. Such failures can lead to inadequate data delivery to the monitoring applications resulting in erroneous conclusions. This paper presents a missing values substitution framework that addresses the aforementioned issue. The presented framework has been evaluated within a pervasive sensor monitoring environment that collects and transmits patient health related data and results have been presented. Copyright © 2010 ACM.

关键词： Outages

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Research on language model of long-distance dependency

Research on language model of long-distance dependency

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2010 International Conference on Advances in Energy engineering, ICAEE 2010

作者： Xu, Zhi Hai Xie, Jian Ge, Wei Hu, Chun Network Center Nan Chang University Nan Chang 330031 China Dept. of Information Engineering Jiangxi Vocational and Technical College of Electricity Nang Chang 330032 China Computer Science Department Jiang Xi Radio and Television University Nang Chang 330046 China Network Center Jiangxi Science and Technology Normal University Nan Chang 330013 China

In this paper, we discussed current situation and problems of the statistical language models. And then the development and realization methods of the long-distance dependency language model simply introduced At last ... 详细信息

ISBN: (纸本)9781424478309

关键词： Natural language processing systems

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