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QoS Aware Services Discovery in a P2P Grid Environment

QoS Aware Services Discovery in a P2P Grid Environment

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international conference on Pervasive Computing and Applications (ICPCA)

作者： Antonella Di Stefano Giovanni Morana Daniele Zito Dipartimento di Ingegneria Informatica e Telecomunicazioni Universitá di Catania Italy

In recent years, grid systems and peer to peer networks are the most used solutions to achieve the same goal: sharing resources and services in heterogeneous, dynamic, distributed environments. Grid systems have well defined middleware, able to assure trust among participants, but they are not totally scalable and they have low fault tolerance. On the other hand, with their decentralized model, P2P systems are more scalable and fault tolerant than grid systems, but they do not have concrete solutions for issues related to security or credential management. Many studies have proposed hybrid approaches that try to conjugate the advantages of the two models. This paper proposes an architecture that integrates the P2P interaction model in grid environments, so as to build an open cooperative model wherein grid entities are composed in a decentralized way. In particular, this paper focuses on a QoS aware discovery algorithm for P2P Grid systems, analyzing protocols and explaining techniques used to improve its performance.

关键词： Peer to peer computing Middleware Protocols Scalability Fault tolerant systems computer crashes Telecommunications Concrete security Performance analysis

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OASiS: A Programming Framework for Service-Oriented Sensor networks

OASiS: A Programming Framework for Service-Oriented Sensor N...

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international conference on Communication systems Software and Middleware (COMSWARE)

作者： Manish Kushwaha Isaac Amundson Xenofon Koutsoukos Sandeep Neema Janos Sztipanovits Institute for Software Integrated Systems (ISIS) Vanderbilt University Nashville TN USA

Wireless sensor networks consist of small, inexpensive devices which interact with the environment, communicate with each other, and perform distributed computations in order to monitor spatio-temporal phenomena. These devices are ideally suited for a variety of applications including object tracking, environmental monitoring, and homeland security. At present, sensor network technologies do not provide off-the-shelf solutions to users who lack low-level network programming experience. Because of limited resources, ad hoc deployments, and volatile wireless communication links, the development of distributed applications require the combination of both application and system-level logic. Programming frameworks and middleware for traditional distributed computing are not suitable for many of these problems due to the resource constraints and interactions with the physical world. To address these challenges we have developed OASiS, a programming framework that provides abstractions for object-centric, ambient-aware, service-oriented sensor network applications. OASiS uses a well-defined model of computation based on globally asynchronous locally synchronous dataflow, and is complemented by a user-friendly modeling environment. Applications are realized as graphs of modular services and executed in response to the detection of physical phenomena. We have also implemented a suite of middleware services that support OASiS to provide a layer of abstraction shielding the low-level system complexities. A tracking application is used to illustrate the features of OASiS. Our results demonstrate the feasibility and the benefits of a service-oriented programming framework for composing and deploying applications in resource-constrained sensor networks.

关键词： Sensor phenomena and characterization distributed computing Monitoring Middleware Wireless sensor networks computer networks Spatiotemporal phenomena Terrorism Wireless communication Logic programming

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Fusion of Multi-Modal Credentials for Authentication in Digital Identity Management systems

Fusion of Multi-Modal Credentials for Authentication in Digi...

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international conference on Wireless Broadband and Ultra Wideband Communications (AusWireless)

作者： Jackson Phiri Johnson I. Agbinya Department of Computer Science University of Technology Sydney Australia Department of Computer Science University of Western Cape South Africa

The recent years have seen an increase in identity fraud and accessing online services when communication devices such as computers, mobile phones and card based credentials (e.g. credit cards) are involved. This has prompted most governments and business organizations to change the way they do business and manage the user's identity information. However Internet users are vulnerable to identity fraud, which is on the increase and costing the global economy excessive amounts. With the advent of wireless technologies, peer-to-peer communication, GSM networks, it is becoming more challenging to build systems to authenticate users more efficiently. Traditional methods of authenticating a user with passwords and PIN numbers only are slowly proving ineffective since these credentials are easy to guess and steal. This paper proposes a distributed multimodal authentication system as a solution for managing digital identity information on most wireless networks. The proposed system uses artificial intelligence methods and biometrics to improve the security and privacy of users and service providers in a transparent, reliable and efficient way. The system is implemented using a technique of information fusion to combine the user's credentials for optimum recognition and authentication.

关键词： Credentials Attributes Digital Identity Authentication Authorization Information Fusion

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An efficient ID-based bilinear key predistribution scheme for distributed sensor networks

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2nd international conference on High Performance Computing and Communications (HPCC 2006)

作者： Dai, Tran Thanh Hieu, Cao Trong Hong, Choong Seon Kyung Hee Univ Dept Comp Engn Networking Lab Yongin 449701 Gyeonggi South Korea

ISBN: (纸本)3540393684

security requirements are very pressing in distributed sensor networks due to exploitation purposes of these networks in human life, especially in military tasks. To obtain security in these sorts of networks, it is crucial to enable message encryption and authentication features among sensor nodes. This thing could be performed using keys agreed upon by communicating nodes. Nonetheless, acquiring such key agreement in distributed sensor networks becomes extremely intricate due to resource constraints. Up to now, there are many key agreement schemes proposed wired and wireless networks of which key predistribution schemes are considered to be the fittest solutions. Based on this observation, in this paper, we propose a key predistribution scheme relying on sensor nodes' unique identifiers. Our scheme exhibits several noteworthy properties: direct pairwise key establishment permission with explicit key authentication, high resiliency against information-theoretic security attack (node capture attack). We also present a detailed security and performance analysis of our scheme in terms of node capture attack, memory usage, communication overhead, and computational overhead.

关键词： distributed computer systems

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Fighting intrusions in wireless LANs: A need for the reference model

Fighting intrusions in wireless LANs: A need for the referen...

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2nd IEEE/IFIP international conference in Central Asia on Internet

作者： Pakstas, A. Salekzamankhani, S. Virdee, B. London Metropolitan Univ Dept Comp Commun Technol & Math 166-220 Holloway Rd London N7 8DB England

ISBN: (纸本)9781424405428

A traditional way to improve security of wired computer network can be achieved by applying access control policies to the front door of network. However these policies may be not sufficient and effective any more when applied to the Wireless Local Area networks (WLANs). WLANs are different from the traditional wired LANs in terms of their exposure to potential threats, vulnerability and security techniques. Intrusions to WLANs are facts of the everyday life and handling them becomes more and more difficult. Currently there is no standardised reference model which may help to design, compare and evaluate the existing or future Intrusion Handling systems (IHSs) for WLANs. Analysis of the commercial IHSs shows that they all are built as a proprietary systems which are neither taking into consideration existence of other IHSs nor they are trying to find the ways to establish inter-IHS collaboration which may help to achieve better security for the end-users. Hence this paper starts by an analysis of the features of existing IHSs for WLANs, follows with proposing the new ways to enhance their design, and then is discussing development of such a novel reference model for a scalable distributed IHS architecture.

关键词： Wireless local area networks (WLAN)

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Defending against distributed Denial of Service (DDoS) attacks with queue traffic differentiation over micro-MPLS-based wireless networks

Defending against Distributed Denial of Service (DDoS) attac...

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2nd international conference on systems and networks Communications, ICSNC 2006

作者： Fowler, Scott Zeadally, Sherali Department of Computer Science Wayne State University Detroit MI 48202 United States Department of Computer Science and Information Technology University of the District of Columbia Washington DC 20008 United States

ISBN: (纸本)0769526993

Traditional security research has been on privacy or authentication. Unfortunately, attacks on wireless media cannot be simply addressed using traditional security methods [1]. An example of a security threat which is difficult to address using traditional network security techniques is Denial of Service (DoS) attacks. Under DoS attacks it is difficult to provide legitimate users their fair shares of bandwidth. However, it is important to allocate a fair share of bandwidth for multimedia traffic requiring Quality of Service. In this paper we address the issue of DoS attacks between mobile nodes and MPLS domains by proposing a queue differentiation policy at the entry point of the MPLS domain. We also investigated DoS attacks of the entry point (Foreign Domain Agent) into Micro-MPLS-based networks (otherwise know a Hierarchical Mobile MPLS (HMPLS)) [2]. Our simulation results show that our proposed technique provides maximum resource utilization by increasing the throughput of multimedia traffic while the network is under DoS attacks. © IEEE.

关键词： Wireless sensor networks

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Autonomically improving the security and robustness of structured P2P overlays

Autonomically improving the security and robustness of struc...

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2nd international conference on systems and networks Communications, ICSNC 2006

作者： Kunzmann, Gerald Binzenhöfer, Andreas Institute of Computer Science University of Würzburg

ISBN: (纸本)0769526993

Recent research efforts have shown that peer-topeer (p2p) mechanisms incorporate a potential that goes well beyond simple file sharing. Compared to the classic client-server architecture, these systems do not suffer from a single point of failure. However, there is still the danger that an adversary is able to attack a specific subpart of the system. This is especially true for structured p2p networks like Chord. A well targeted attack could cause disruptions in its global ring structure and result in severe performance degradations, loss of resources or major malfunctions. In this paper we introduce a self-protecting approach to prevent such disruptions before they actually happen. However, since it is practically impossible to avoid all failures and attacks, we also present selfrepairing algorithms, which are able to automatically detect disruptions and initiate appropriate countermeasures to reestablish the structure of the overlay. © IEEE.

关键词： distributed computer systems

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COTA: A robust multi-hop localization scheme in wireless sensor networks

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2nd IEEE international conference on distributed Computing in Sensor systems

作者： Wei, Yawen Yu, Zhen Guan, Yong Iowa State Univ Dept Elect & Comp Engn Ames IA 50011 USA

ISBN: (纸本)3540352279

In wireless sensor networks, multi-hop localization schemes are very vulnerable to various attacks such as wormholes and range modification attacks. In this paper, we propose a robust multi-hop localization scheme, namely COTA, to mitigate various attacks in wireless sensor networks. In this scheme, each localized sensor generates a COnfidence TAg to quantify the quality of its estimated location and broadcasts both the confidence tag and the estimated location in reference messages. When receiving sufficient number of references, an unlocalized sensor filters out bad references and weighs the remaining ones according to their tags. Once location determination is done, the sensor generates its own confidence tag from the indicator of its localization error. By properly setting the filtering metrics and computing the confidence tags, COTA can prevent the proliferation of location errors and achieves accurate location estimations and high localized percentage for sensor networks. To our knowledge, ours is the first work to address the security-aware multi-hop localization problem. We finally present security analysis and simulations to evaluate the effectiveness of COTA. © Springer-Verlag Berlin Heidelberg 2006.

关键词： computer networks

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2nd international conference on Information systems security, ICISS 2006

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2nd international conference on Information systems security, ICISS 2006

ISBN: (纸本)9783540689621

The proceedings contain 32 papers. The special focus in this conference is on Information systems security. The topics include: Privacy in the electronic society;a data sharing agreement framework;network monitoring for security and forensics;fairness strategy for multilevel secure concurrency control protocol;fairness strategy for multilevel secure concurrency control protocol;virtual private organizations to manage security policy interoperability;privacy preserving web-based email;context-aware provisional access control;extending context descriptions in semantics-aware access control;design of key establishment protocol using one-way functions to avert insider-replay attack;an efficient key assignment scheme for access control in a hierarchy;secure data management in reactive sensor networks;simulating threats to corporate assets;two stage credit card fraud detection using sequence alignment;a dead-lock free self healing algorithm for distributed transactional processes;an efficient public key cryptosystem secure against chosen ciphertext attack;a partial image encryption method with pseudo random sequences;high capacity lossless data hiding;an implementation and evaluation of online disk encryption for windows systems;disclosure risk in dynamic two-dimensional contingency tables;a survey of control-flow obfuscations;filtering out unfair recommendations for trust model in ubiquitous environments;secure itineraries framework for mobile agent systems;malafide intension based detection of privacy violation in information system;design and development of malafide intension based privacy violation detection system;towards a formal specification method for enterprise information system security and recent research on privacy preserving data mining.

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security considerations in space and delay tolerant networks

Security considerations in space and delay tolerant networks

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IEEE international conference on Space Mission Challenges for Information Technology, SMC-IT

作者： S. Farrell V. Cahill Distributed Systems Group Department of Computer Science Trinity College Dublin Ireland

This paper reviews the Internet-inspired security work on delay tolerant networking, in particular, as it might apply to space missions, and identifies some challenges arising, for both the Internet security community and for space missions. These challenges include the development of key management schemes suited for space missions as well as a characterization of the actual security requirements applying. A specific goal of this paper is therefore to elicit feedback from space mission IT specialists in order to guide the development of security mechanisms for delay tolerant networking

关键词： Intelligent networks Disruption tolerant networking Space missions IP networks Protocols Data security Web and internet services computer security Space technology Cryptography

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