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Annual Hawaii international conference on System Sciences (HICSS)

作者： Chenxi Wang A. Carzaniga D. Evans A.L. Wolf Electrical and Computer Engineering Department Carnegie Mellon University USA Department of Computer Science University of Colorado Boulder USA Department of Computer Science University of Virginia USA

ISBN: (纸本)0769514359

Publish-subscribe is a communication paradigm that supports dynamic, many-to-many communications in a distributed environment. Content-based pub-sub systems are often implemented on a peer-to-peer infrastructure that enables information dissemination from information producers (publishers) to consumers (subscribers) through a subscription mechanism. In a wide-area pub-sub network, the pub-sub service must handle information dissemination across distinct authoritative domains, heterogeneous platforms and a large, dynamic population of publishers and subscribers. Such an environment raises serious security concerns. In this paper, we investigate the security issues and requirements that arise in an internet-scale content-based pub-sub system. We distinguish among those requirements that can be achieved with current technology and those that require innovative solutions.

关键词： Internet Publish-subscribe Subscriptions Data security Communication system security distributed computing Information security Routing computer science IP networks

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CoStore: a serverless distributed file system utilizing disk space on workstation clusters

CoStore: a serverless distributed file system utilizing disk...

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IEEE international conference on Performance, Computing and Communications (IPCCC)

作者： Yong Chen L.M. Ni Mingyao Yang P. Mohapatra Computer Science & Engineering Michigan State University USA Sun Microsystems Inc. USA

ISBN: (纸本)0780373715

CoStore is a serverless distributed file system designed to provide cost-effective storage service utilizing idle disk space on workstation clusters. With all the system responsibilities evenly distributed across a group of collaborating workstations, the proposed architecture provides improved performance, reliability, and scalability. We have collected workstation uptime data from production systems. The assessment based on RAID reliability theory confirmed the feasibility of deploying CoStore on an existing desktop computing infrastructure. We have implemented a CoStore prototype and measured its performance. Preliminary results indicate that CoStore performance is comparable to that of commonly used distributed file systems, such as NFS, Samba, and Windows 2000 Server.

关键词： File systems Workstations Network servers computer architecture Storage area networks Data security Operating systems computer science Design engineering Java

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An intrusion detection system based on data mining and immune principles

An intrusion detection system based on data mining and immun...

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international conference on Machine Learning and Cybernetics (ICMLC)

作者： Jun-Zhong Zhao Hou-Kuan Huang School of Computer and Information Technology Northern Jiaotong University Beijing China

In this paper, a framework of an immune-based intrusion detection system (IDS) is presented. Here data mining techniques are used to discover frequently occurring patterns, which are equivalent to self proteins in the immune system. During the tolerance process known as negative selection, a set of valid detectors that does not match any self protein mined previously is generated in the space of nonself based on a distance metric. These negative detectors are distributed into the network system to perform anomaly detection independently and concurrently. Our experiment confirms a low false positive rate and a high detection rate.

关键词： Intrusion detection Data mining Immune system computer security Artificial immune systems Data security Proteins Detectors computer networks IP networks

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Factoring mobile agents

Factoring mobile agents

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international conference and Workshop on Engineering of computer-Based systems

作者： K.J. Lauvset D. Johansen K. Marzullo Department of Computer Science University of Tromsø Tromso Norway Department of Computer Science and Engineering University of California San Diego La Jolla CA USA

ISBN: (纸本)0769515495

In this paper we argue that the traditional model of a mobile agent provides a poor programming structure. We base our argument on our experience since 1993 in building distributed applications and mobile agent platforms. We have observed that every distributed application contains three distinct aspects, which we call function, mobility and management. Separating an application into these three aspects and programming them separately affords great flexibility and leverage when designing mobile agent applications for distributed system management. Because of these observations, we have developed a programming model and a mobile agent system in which these three aspects are clearly separated.

关键词： Mobile agents computer science computer networks Application software Functional programming Virtual machining Filters Operating systems Fault tolerance security

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Peer-to-peer network computing model design

Peer-to-peer network computing model design

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international conference on computer Supported Cooperative Work in Design

作者： Junzhou Luo Xiaoqiang Tong Department of Computer Science and Engineering South-East University Nanjing China

ISBN: (纸本)8528500500

We introduce a peer-to-peer computing model, JP2P, which can be used in network computing and collaborative systems. The basic theory and logic structure of a network computing system are analyzed in detail, and the relevant protocols are discussed thoroughly. According to the discussion, we propose the general conceptions of the new distributed computing model and our views on how to deploy and apply the network computing system. A simple example is given to illustrate the application development process on the top of the JP2P architecture.

关键词： Peer to peer computing computer networks computer architecture Communication system security Collaboration Protocols distributed computing Logic Cryptography Web server

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Tracking multiple people using distributed vision systems

Tracking multiple people using distributed vision systems

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IEEE international conference on Robotics and Automation (ICRA)

作者： N. Atsushi K. Hirokazu H. Shinsaku I. Seiji Institute of Industrial Science University of Tokyo Hiroshima City University Osaka University Japan

We describe a method for observing multiple targets in a wide-area spatial environment using a distributed vision system (DVS). The DVS is constructed of some 'watching stations' that consist of a camera, an image processor and a computer network that connects each systems. The system's goal is to track multiple people in a wide-area that cannot be watched by single visual sensor. Our approach is based on three algorithms; an algorithm for real-time human tracking, the task decision algorithms of individual watching stations, and the object-matching method used between stations. We also describe experimental results that show the validity of our approach.

关键词： Machine vision Voltage control Cameras Target tracking computer networks Humans Sensor systems Surveillance Information security Teleconferencing

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Analysis of system performance by changing the ring architecture on the dual ring CC-NUMA system

Analysis of system performance by changing the ring architec...

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international conference on Parallel and distributed systems (ICPADS)

作者： Joo Beom Yun Seong Tae Jhang Chu Shik Jhon Cheol Won Lee National Security Research Institute Taejon South Korea Department of Computer Science University of Suwon Hwasung Kyunggi South Korea School of Computer Engineering Seoul National University Seoul South Korea

ISBN: (纸本)0769517609

Since NUMA architecture has to access remote memory, the interconnection network determines the performance of the CC-NUMA system. Bus, which has been used as a popular interconnection network, has many limits in a large-scale system because of the limited physical scalability and bandwidth. The dual ring interconnection network, composed of high-speed point-to-point links, is made to resolve the defects of the bus for the large-scale system. However, it also has a problem, in that the response latency is rapidly increased when many nodes are attached to the snooping based CC-NUMA system with the dual ring. In this paper, we propose a chordal ring architecture in order to overcome the problem of the dual ring on a snooping based CC-NUMA system, and design an efficient link controller adapted to this architecture. We will also analyze the effects of chordal ring architecture on the system performance and the response latency by using a probability-driven simulator.

关键词： Performance analysis System performance Multiprocessor interconnection networks Scalability Multiprocessing systems computer architecture Delay Frequency Large-scale systems Bandwidth

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Design space exploration for energy-efficient secure sensor network

Design space exploration for energy-efficient secure sensor ...

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international conference on Application Specific systems (ASAP), Architectures and Processors

作者： Lin Yuan Gang Qu Electrical and Computer Engineering Department and Institute of Advanced Computer Study University of Maryland College Park MD USA

We consider two of the most important design issues for distributed sensor networks in the battlefield: security for communication in such hostile terrain; and energy efficiency because of the battery's limited capacity and the impracticality of recharging. Communication security is normally provided by encryption, i.e. data are encrypted before transmission and are decrypted first on reception. We exploit the secure sensor network design space for energy efficiency by investigating different microprocessors coupled with various public key algorithms. We propose a power control mechanism for sensors to operate in an energy-efficient fashion using the newly developed dynamical voltage scaling (DVS) technique. In particular we consider multiple voltage processors and insert additional information into the communication channel to guide the selection of proper voltages for data decryption/encryption and processing in order to reduce the total computational energy consumption. We experiment several encryption standards on a broad range of embedded processors and simulate the behavior of the sensor network to show that the sensor's lifetime can be extended substantially.

关键词： Space exploration Energy efficiency Cryptography Data security Voltage Capacitive sensors Algorithm design and analysis Microprocessors Couplings Public key

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A semantic framework for specifying and reasoning about composable distributed middleware services

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IFIP Advances in Information and Communication Technology 2002年 81卷 25-26页

作者： Talcott, Carolyn SRI International 333 Ravenswood Avenue Menlo Park CA 94025SRI United States

ISBN: (纸本)9781475752687

Middleware such as Corba ORBs, DCOM, or Java Beans provide programming abstractions for interoperation of diverse components in an open distributed setting. More recent middleware initiatives focus on resource management, security, and dependability services supporting a wide range of coordination and Quality of Service (QoS) requirements and allowing applications programmers to focus on functionality and intrinsic performance issues. As computer systems become more and more complex and ubiquitous it is increasingly important to have robust and powerful middleware that can achieve a high degree of reliability and assurance where needed. For example, as networks become more programmable it will be essential to minimize failures not only by simulation and testing, but also by formal modeling and analysis at many levels of abstraction. For adaptability and extensibility middleware services themselves need to be built from component services. Middleware services for resource management such as scheduling, protocols providing security and reliability, load balancing and stream synchronization, execute concurrently with each other and with application activities and can therefore potentially interfere with each other in subtle ways. The Two Level Actor Model (TLAM) is a mathematical framework designed for reasoning about the interaction and composition of resource management activities in open distributed systems, and their dynamic installation and modification. The TLAM is based on the actor model of object-based distributed computation. As the name suggests, in the TLAM, a system is composed of two kinds of actors, base-level actors and meta-level actors, distributed over a network of processing nodes. Base-level actors carry out application-level computation, while meta-level actors are part of the runtime system (middleware) that manages system resources and controls the runtime semantics of the base level. The TLAM model has been applied to reasoning about services s

关键词： Middleware

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Scalable data fusion using Astrolabe

Scalable data fusion using Astrolabe

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international conference on Information Fusion

作者： K.P. Birman R. van Renesse W. Vogels Reliable Network Solutions Inc. Cornell University USA

The dramatic growth of computer networks creates both an opportunity and a daunting distributed computing problem for users seeking to perform data fusion and data mining. The problem is that data often resides on large numbers of devices and evolves rapidly. systems that collect data at a single location scale poorly and suffer from single-point-failures. Astrolabe performs data fusion in real-time, creating a virtual system-wide hierarchical database, which evolves as the underlying information changes. A scalable aggregation mechanism offers a flexible way to perform data mining within the resulting virtual database. Astrolabe is secure, robust under a wide range of failure and attack scenarios, and imposes low loads even under stress.

关键词： Data mining Databases Peer to peer computing Robustness Biosensors distributed computing Protocols Scalability Data security Application software

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