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LHAP: a lightweight hop-by-hop authentication protocol for ad-hoc networks

LHAP: a lightweight hop-by-hop authentication protocol for a...

引用

international conference on distributed computing systems Workshop

作者： Sencun Zhu Shouhuai Xu S. Setia S. Jajodia Center for Secure Information Systems George Mason University Fairfax VA USA Department of Information and Computer Science University of California Irvine CA USA MITRE Corporation Mclean VA USA

Most ad hoc networks do not implement any network access control, leaving these networks vulnerable to resource consumption attacks where a malicious node injects packets into the network with the goal of depleting the resources Of the nodes relaying the packets. To thwart or prevent such attacks, it is necessary to employ authentication mechanisms that ensure that only authorized nodes can inject traffic into the network. In this paper we present LHAP a scalable and light-weight authentication protocol for ad hoc networks. LHAP is based on two techniques: (i) hop-by-hop authentication for verifying the authenticity of all the packets transmitted in the network and (ii) one-way key chain and TESLA for packet authentication and for reducing the overhead for establishing trust among nodes. We analyze the security of LHAP and show LHAP is a lightweight security protocol through detailed performance analysis.

关键词： Authentication Ad hoc networks Access control Routing protocols Computer science Relays Performance analysis Broadcasting Communication system control Computer networks

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A novel video shot detection technique using color anglogram and latent semantic indexing

A novel video shot detection technique using color anglogram...

引用

international conference on distributed computing systems Workshop

作者： Rong Zhao W.I. Grosky Department of Computer Science State University of New York Stony Brook NY USA Department of Computer & Information Science University of Michigan Dearborn MI USA

In this paper, we present the results of our work that seeks to negotiate the gap between low-level features and highlevel concepts in the domain of video shot detection. We introduce a novel technique for spatial color indexing, color anglogram, which is invariant to rotation, scaling, and translation. This work also concerns a dimension reduction technique, latent semantic indexing (LSI), which has been used for textual information retrieval for many years. In this paper, we examine the use of these techniques for video shot detection, hoping to uncover the semantic correlation between video frames. Experimental results show that LSI, together with color anglogram, is able to extract the underlying semantic structure of video contents, thus helping to improve the shot detection performance.

关键词： Gunshot detection systems Indexing Large scale integration Information retrieval Data mining Content based retrieval Computer science Videoconference Data security Software libraries

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Residents oriented disaster information network

Residents oriented disaster information network

引用

international conference on distributed computing systems Workshop

作者： Y. Shibata D. Nakamura N. Uchida K. Takahata Faculty of Software and Information Science Iwate Prefectural University Iwate Japan

Recently, risk management for the disasters such as earth quick, mountain explosion, seismic sea wave, in addition to ordinal disasters, such as typhoon, rain flooding and snow-slide has been seriously concerned to keep the safety for the residents in many countries. More reliable and robust information system than the conventional business or research oriented information networks must be constructed to normally and correctly perform their functions for residents even though serious disaster happened. In this paper, we propose a unified Wide area Disaster information Network (WDN) using Internet based on the combination of both wired and wireless networks. The system requirements and their functions of WDN are precisely defined and the various types of information for residents are precisely defined. The prototype system of the disaster information system based on our suggested WDN was built to demonstrate and evaluate its functionality. Through the practical training in the local city for preparation of mountain explosion, we could confirm the usefulness of our suggested system.

关键词： Explosions Risk management Earth Typhoons Rain Floods Safety Robustness Management information systems IP networks

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Osmosis: scalable delivery of real-time streaming media in ad-hoc overlay networks

Osmosis: scalable delivery of real-time streaming media in a...

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international conference on distributed computing systems Workshop

作者： A. Bestavros Shudong Jin Computer Science Department Boston University USA

Ad-hoc overlay networks are increasingly used for sharing static bulk content but their promise for scaling the delivery of on-demand, real-time content is yet to be tapped. In this paper, we show that overlay networks could be used efficiently to distribute popular real-time streaming media on-demand to a large number of clients. We propose and evaluate OSMOSIS a cache-and-relay end-system multicast approach, whereby a client joining a multicast session caches the stream, and if needed, relays that stream to neighboring clients which may join the multicast session at some later time. OSCMOSIS is fully distributed, scalable, and efficient in terms of network link costs. We present analytical and empirical results of our evaluation of OSMOSIS. Our analysis establishes OSMOSIS scalability characteristics under a variety of assumptions. Our simulations are over large, synthetic random networks, power-law degree networks, and small-world networks (all of which could well be representative of ad-hoc overlay topologies, as well as over large real router-level Internet maps.

关键词： Streaming media Intelligent networks Costs Scalability Peer to peer computing Network servers Bandwidth Osmosis Content based retrieval Video on demand

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Design of a development environment for Web-based asynchronous and synchronous integrated groupware systems

Design of a development environment for Web-based asynchrono...

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international conference on distributed computing systems Workshop

作者： M. Tanaka Y. Teshigawara Graduate School of Engineering Soka University Japan

Asynchronous and asynchronous integrated multimedia conferencing system ASSIST aims for corresponding to both of realtime conferences and non-realtime conferences. Especially, it is designed for effective information sharing by storing realtime conferencing information including multimedia information such as video and audio, and by making relation to conferencing items and information for asynchronous groupware tools such as schedule/task management, e-mail, and BBS. It is significant to construct efficient development environment for ASSIST, because it requires much effort to build this kind of systems each time in compliance with various purposes or display devices. We have designed a development environment for it and developed the prototype. The prototype system is currently focused on the implementation of facilities for asynchronous type groupware, and it makes developers possible to display tables of databases with sortable links for each field into Web browser by writing only a few line statements. In addition, we have considered integration methods for asynchronous and synchronous type Web-based groupware, applying architecture of we b-based slide sharing tool which we have already implemented. In this paper, we describe the design of a development environment for Web-based asynchronous and synchronous integrated groupware systems.

关键词： Collaborative software Collaborative work Displays Prototypes Multimedia systems Video sharing Videoconference Electronic mail Databases Writing

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Enforcing interdependencies and executing transactions atomically over autonomous mobile data stores using SyD link technology

Enforcing interdependencies and executing transactions atomi...

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international conference on distributed computing systems Workshop

作者： S.K. Prasad A.G. Bourgeois E. Dogdu R. Sunderraman Yi Pan S. Navathe V. Madisetti Computer Science Department Georgia State University Atlanta GA USA College of Computing Georgia Institute of Technology USA Department of Electrical Engineering Georgia Institute of Technology Atlanta GA USA

System of Mobile Devices (SyD) is a middleware we developed that can he used for implementing collaborative, mobile, and distributed applications over heterogeneous devices, data stores, and computing environments. Current prototype implementation of SyD consists of five modules. These modules provide ease of programming in the areas of distributed communication, remote method invocation, service publication and discovery, directory services, distributed service invocation and aggregation, event handling, collaborative link creation and enforcement. A central module is SyDLink which allows SyD-based applications to create "coordination" links. Coordination links represent dependencies among heterogeneous devices and application components. Based on the underlying event-and-trigger mechanism, they allow automatic updates as well as real-lime enforcement of global constraints and interdependencies. SyDLink objects provide the underlying mechanism in SyD to enforce atomic execution of distributed transactions. We explain and demonstrate the use of SyDLink objects via a running example, a collaborative SyD calendar application, throughout the paper.

关键词： Middleware Collaboration Mobile computing Calendars distributed computing Prototypes Energy management Computer science Educational institutions Application software

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A loop-free asynchronous data sharing mechanism in multiprocessor real-time systems based on timing properties

A loop-free asynchronous data sharing mechanism in multiproc...

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international conference on distributed computing systems Workshop

作者： Jing Chen Department of Electrical Engineering National Cheng Kung University Tainan Taiwan

ISBN: (纸本)0769519210

This paper presents an asynchronous data sharing mechanism for real-time applications with multiple writers. The mechanism is constructed from a fully asynchronous single writer data sharing mechanism implemented through a timing-based approach, which, being lock-free and loop-free, addresses the problems of priority inversion and unbounded blocking among real-time tasks running under priority-based scheduling. By replicating the single writer data sharing mechanism and modifying its data buffer access control function, the multi-writer data sharing mechanism is constructed such that the desired safety property and feasibility conditions on data buffer allocation are maintained by those single writer data sharing mechanisms. To address the issue on data coherence, all the writer tasks follow a data coherence protocol which is designed with the concept of timestamp ordering. The feasibility condition of this protocol is constructed through analyzing the timing properties of writer tasks. This multi-writer data sharing mechanism stands for another demonstration of the timing-based approach which is an effective alternative to the traditional algorithm-based approaches.

关键词： Real time systems Timing Mechanical factors Computer buffers Buffer storage Protocols Processor scheduling Writing Cities and towns Access control

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A new overflow replacement policy for efficient location management in mobile networks

A new overflow replacement policy for efficient location man...

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international conference on distributed computing systems Workshop

作者： Ying Luo Yi Pan Jie Li Yang Xiao Xiaola Lin Department of Computer Science Georgia State University Atlanta GA USA Institute of Information Sciences & Electronics University of Tsukuba Japan Computer science Division University of Memphis Memphis TN USA Department of Computer Science City University of Hong Kong Hong Kong China

ISBN: (纸本)0769519210

Location management is one of the most important issues in mobile networking systems. Most current mobile systems employ a two-tier database structure to store mobile users' information. HLR (Home Location Register) is used to retrieve user's information, and VLR (Visitor Location Register) is the temporal database for storing visitors' profile. In the case that the number of users exceeds the capacity of the VLR due to mobility, database overflow occurs. In this paper, we propose a new policy, the least frequent replacement policy, which selects the least frequently accessed users as replacement candidates. Extensive simulation is carried out for predicting the performance of the existing replacement policies and the proposed least frequent policy. Our simulation results show that the most idle and least frequent policies outperform the inactive and random replacement policies in most cases and that the least frequent policy performs slightly better than the most idle replacement policy.

关键词： Intelligent networks distributed databases Computer network management Mobile computing Computer science Costs Registers Information retrieval Predictive models Memory management

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IPv6 prefix delegation-based addressing solution for a mobile personal area network

IPv6 prefix delegation-based addressing solution for a mobil...

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international conference on distributed computing systems Workshop

作者： P. Paakkonen J. Latvakoski VTT Technical Research Center of Finland Oulu Finland

This paper provides a dynamic IPv6 prefix delegation-based addressing solution to enable Internet connectivity when a Personal Area Network (PAN) is moving between sub-networks. A PAN consists of a cluster of mobile devices, which are dynamically connected with each other and move around together. The approach is based on IPv6 stateless address auto-configuration, and Automatic Prefix Delegation Protocol for IPv6. The problems related to addressing, mobility and IPv6 prefix delegation are evaluated with the constructed prototype. The experiences indicate that the solution is quite light and enables session continuity in subnet changes for any mobile node of a PAN. In addition, the solution does not exclude application of Mobile IPv6 (MIPv6), however Mobile IPv6 is not necessarily needed when Session Initiation Protocol (SIP) based mobility is applied By using SIP, route optimization is also achieved and IPv6 encapsulation is avoided with UDP-based sessions. However, the solution is not necessarily very scalable to big mobile networks.

关键词： Personal area networks IP networks Ad hoc networks Protocols Prototypes Encapsulation Internet Mobile ad hoc networks Mobile computing Standardization

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Proceedings - international conference of the Chilean Computer Science Society, SCCC

Proceedings - International Conference of the Chilean Comput...

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23rd international conference of the Chilean Computer Science Society, SCCC 2003

ISBN: (纸本)0769520081

The proceedings contain 16 papers. The topics discussed include: a performance comparison among the traditional R-trees, the Hilbert R-tree and the SR-tree;improved deletions in dynamic spatial approximation trees;a ProtoG algorithm applied to the traveling salesman problem;an algorithmic model for real-time computation;parallel discrete-event simulation framework;SPIN: a toolkit for distributed scientific computing;efficient computation of algebraic operations over dynamically reconfigurable systems specified by rewriting-logic environments;state automata extraction from recurrent neural nets using k-means and fuzzy clustering;grammatically based genetic programming for mining relational databases;resource management schemes in optical networks;and estimating the joint spectral radius of a nonseparable multiwavelet.

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