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检索条件"任意字段=2nd International Conference on Security in Computer Networks and Distributed Systems, SNDS 2014"

共 309 条记录，以下是221-230 订阅

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The back/forward sweep-based power flow method for distribution networks with DGs

The back/forward sweep-based power flow method for distribut...

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Workshop on Power Electronics and Intelligent Transportation System, PEITS

作者： Limei Zhang Wei Tang Honghao Guan College of Information and Electrical Engineering China Agricultural University Beijing China College of Information Science & Technology Agricultural University of Hebei Baoding China

Power system deregulation and the shortage of transmission capacities have led to increased interests in distributed generation sources (DGs). The high penetration of distributed generation (DG) units at the distribution level have a profoundly influence on grid security, operation, planning, etc. Therefore, based on the back/forward sweep methods, this paper presents a power flow method for radial distribution networks with DGs. To improve robustness and enhance convergence rate of the solution method, we developed an efficient branch and nodal numbering scheme and employed variable step-size factor and next-linked branch matrix. Meanwhile, a computer program implementing the solution scheme was developed and successfully applied to several practical and complex radial distribution networks. The results show that the proposed method has excellent convergence rate and is simple, flexible, reliable and very robust while maintaining necessary accuracy. It is available to calculate power flow for radial distribution network with multi-source and multi-type DGs. The solutions are given and compared with the results acquired with existing software to verify the proposed approaches.

关键词： Load flow Robustness Power generation Power system security Power system planning Intelligent transportation systems Educational institutions distributed control Maintenance Power system reliability

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distributed detection in wireless sensor networks 08

Distributed detection in wireless sensor networks

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7th IEEE/ACIS international conference on computer and Information Science in Conjunction with 2nd IEEE/ACIS international Workshop on e-Activity

作者： Cheng, Sheng-Tzong Li, Szu-Yun Chen, Chia-Mei Natl Chung Cheng Univ Dept Comp Sci & Informat Engn Tainan 70101 Taiwan Natl Sun Yat Sen Univ Dept Informat Management Kaohsiung Taiwan

ISBN: (纸本)9780769531311

Wireless sensor networks (WSNs) usually are applied in military systems, surveillance systems, etc. Since WSNs always are deployed in open environments, the security mechanisms in WSNs are very important. Although there are many security mechanisms in WSNs, such as intrusion detection and fault tolerant system, few of them are proposed to detect compromised sensors. In this paper, we propose an application-independent detection model, distributed cross-layer detection model (DCD), making use of a distributed mechanism and the information of each layer in the communication protocol to detect which sensors were already compromised. Due to the characteristics of low power, low computation ability, low storage space, simplicity and high-efficiency is our design goal. Only when compromised sensors can be detected, the WSNs could be safer in practice.

关键词： wireless sensor network intrusion detection

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Secure Ubiquitous Health Monitoring System

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2nd international conference on Network-Based Information systems (NBiS 2008)

作者： Durresi, Arjan Durresi, Mimoza Barolli, Leonard Indiana Univ Purdue Univ Indianapolis IN 46202 USA Fukuoka Inst Technol Fukuoka Japan

ISBN: (纸本)9783540856924

We propose a distributed and secure system that enables global & ubiquitous health monitoring. The biomedical data, collected by wearable sensors will be transmitted using cell phones towards the corresponding Health Monitoring Centers via various wireless networks. The security of personal medical data is paramount. Therefore, we propose a new scheme that enable security communications among cell phones and other wireless networks. In particular, we propose a hybrid authentication scheme that involves both the cellular network and the Health Monitor Centers. Therefore, we take advantage of the strong authentication and non-repudiation provided by the cellular networks. Consequently, our solution guaranties confidentiality, privacy and defences against denial of service attacks.

关键词： Wireless networks

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Lightweight, distributed key agreement protocol for wireless sensor networks

Lightweight, distributed key agreement protocol for wireless...

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2nd IEEE international conference on Secure System Integration and Reliability Improvement, SSIRI 2008

作者： Lin, Che-Cheng Shieh, Shiuhpyng Lin, Jia-Chun Department of Computer Science National Chiao Tung University Hsinchu Taiwan

ISBN: (纸本)9780769532660

Secure key establishment is a fundamental security service in wireless sensor networks. It enables sensor nodes to secure their communications from malicious eavesdropping or tampering. However, due to restricted computing power and limited memory space, traditional public key cryptosystems may not be applicable to sensor hardware. To address this problem, we propose a lightweight distributed key agreement protocol, which enables each sensor node to establish shared secret keys efficiently with its neighboring nodes without the computation of modular exponentiation like in public key cryptosystems. Our protocol utilizes one-way hash function and bit-wise comparison operations, which are efficient and feasible for sensor hardware. The results showed that our approach provides better secure connectivity with lower redundant storage cost than existing schemes. © 2008 IEEE.

关键词： Sensor nodes

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Rating agencies interoperation for peer-to-peer online transactions

Rating agencies interoperation for peer-to-peer online trans...

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2nd international conference on Emerging security Information, systems and Technologies, SECURWARE 2008

作者： Ion, Mihaela Koshutanski, Hristo Hoyer, Volker Telesca, Luigi CREATE-NET Via alia Cascata 56/D Povo-Trento Italy Computer Science Department University of Malaga Spain University of St. Gallen Switzerland

ISBN: (纸本)9780769533292

In current peer-to-peer systems users interact with unknown services and users for the purpose of online transactions such as file sharing and trading of commodities. Peer-to-Peer reputation systems allow users to assess the trustworthiness of unknown entities based on subjective feedback from the other peers. However, this cannot constitute sufficient proof for many transactions like service composition, negotiations and coalition formation in which users require more solid proof of the quality of unknown services. Ratings certified by trusted third parties in the form of a security token are objective and reliable and, hence, allow building trust between peers. Because of the decentralized and distributed nature of peer-to-peer networks, a central authority (or hierarchy of them) issuing such certificates would not scale up. We propose a framework for peer-to-peer agencies interoperation based on rating certificates and meta-certificates describing bilateral agencies relations. © 2008 IEEE.

关键词： Peer to peer networks

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N2N: A layer two peer-to-peer VPN

N2N: A layer two peer-to-peer VPN

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2nd international conference on Autonomous Infrastructure, Management and security

作者： Deri, Luca Andrews, Richard Ntop Org Pisa Italy Symstream Technol Melbourne Vic Australia

ISBN: (纸本)9783540705864

The Internet was originally designed as a flat data network delivering a multitude of protocols and services between equal peers. Currently, after an explosive growth fostered by enormous and heterogeneous economic interests, it has become a constrained network severely enforcing client-server communication where addressing plans, packet routing, security policies and users' reachability are almost entirely managed and limited by access providers. From the user's perspective, the Internet is not an open transport system, but rather a telephony-like communication medium for content consumption. This paper describes the design and implementation of a new type of peer-to-peer virtual private network that can allow users to overcome some of these limitations. N2N users can create and manage their own secure and Geographically distributed overlay network without the need for central administration, typical of most virtual private network systems.

关键词： virtual private network peer-to-peer network overlay

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2nd international Symposium on Network-Centric Ubiquitous systems, NCUS 2006, 2nd international Workshop on security in Ubiquitous Computing systems, SecUbiq 2006, 2nd international Workshop on RFID and Ubiquitous Sensor networks, USN 2006, 1st international Workshop on Trustworthiness, Reliability and services in Ubiquitous and Sensor networks, TRUST 2006, 1st international Workshop on Embedded Software Optimization, ESO 2006 and 1st international Workshop on Multimedia Solution and the Assurance in the Ubiquitous Information systems, MSA 2006 held in conjunction with the IFIP international conference on Embedded and Ubiquitous Computing, EUC 2006

引用

28th IFIP WG 6.1 international conference on Formal Techniques for Networked and distributed systems, FORTE 2008

ISBN: (纸本)3540688544

The proceedings contain 23 papers. The special focus in this conference is on NCUS 2006 Symposium. The topics include: Adaptive router promotion in ad-hoc networks;a utility-based auction cooperation incentive mechanism in peer-to-peer networks;ubiqstor: server and proxy for remote storage of mobile devices;packet length adaptation for energy-proportional routing in clustered sensor networks;a new context script language for developing context-aware application systems in ubiquitous computing;dynamic replication strategies for object storage systems;a cost-effective mobility modelling in nested network mobility;completing uml model of component-based system with middleware for performance evaluation;energy efficient PNC selection procedure for the IEEE 802.15.3-Based HR-WPAN;an efficient multicast routing protocol in multi-rate wireless ad hoc networks;WPAN platform design in handset integrating cellular network and its application to mobile games;reliable transporting and optimal routing on rate-based for ad hoc networks;and automatic extraction of conversation protocols from a choreography specification of ubiquitous web services;inter-sector interference mitigation method in triple-sectored OFDMA systems.

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Secure SIP: A Scalable Prevention Mechanism for DoS Attacks on SIP Based VoIP systems

Secure SIP: A Scalable Prevention Mechanism for DoS Attacks ...

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2nd international conference on Principles, systems and Applications of IP Telecommunications (IPTComm 2008)

作者： Ormazabal, Gaston Nagpal, Sarvesh Yardeni, Eilon Schulzrinne, Henning Columbia Univ Verizon Labs New York NY 10027 USA Columbia Univ Dept Comp Sci Columbia MD USA

ISBN: (纸本)9783540890539

Traditional perimeter security solutions cannot cope with the complexity of VoIP protocols at carrier-class performance. We implemented a large-scale, rule-based SIP-aware application-layer-firewall capable of detecting and mitigating SIP-based Denial-of-Service (DoS) attacks at the signaling and media levels. The detection algorithms, implemented in a highly distributed hardware solution leveraged to obtain filtering rates in the order of hundreds of transactions per second, suggest carrier class performance. Firewall performs SIP traffic filtering against spoofing attacks;and request, response and out-of-state floods. The functionality and performance of the DoS prevention schemes were validated using a distributed test-bed and a custom-built, automated testing and analysis tool that generated high-volume signaling and media traffic, and performed fine grained measurements of filtering rates and load-induced delays of the system under test. The test-tool included SIP-based attack vectors of spoofed traffic, as-well-as floods of requests, responses and out-of-state message sequences. This paper also presents experimental results.

关键词： SIP DoS DDoS VoIP security Signaling Attacks Application Layer Firewall Deep Packet Inspection distributed Computing Scalability

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Automatic Adaptation and Analysis of SIP Headers Using Decision Trees

Automatic Adaptation and Analysis of SIP Headers Using Decis...

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2nd international conference on Principles, systems and Applications of IP Telecommunications (IPTComm 2008)

作者： Hess, Andrea Nussbaumer, Michael Hlavacs, Helmut Hummel, Karin Anna Univ Vienna Dept Distributed & Multimedia Syst A-1080 Vienna Austria

ISBN: (纸本)9783540890539

Software implementing open standards like SIP evolves over time, and often during the first years of deployment, products are either immature or do not implement the whole standard but rather only it subset. As a result, messages compliant to the standard are sometimes wrongly rejected and communication fails. In this paper we describe a, novel approach called Babel-SIP for increasing the rate of acceptance for SIP messages. Babel-SIP is a filter that is put in front of a SIP parser and analyzes incoming SIP messages. It gradually learns which messages are likely to be accepted by the parser, and which are not. Those classified as probably rejected are then adapted such that the probability for acceptance is increased. In a number of experiments we demonstrate that, our filter is able to drastically increase the acceptance rate of problematic SIP REGISTER and INVITE messages. Additionally we show that our approach can be used to analyze the faulty behavior of a SIP parser by using the generated decision trees.

关键词： Protocol adaptation Decision tree based learning SIP

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An IMS Based Mobile Podcasting Architecture Supporting Multicast/Broadcast Delivery

An IMS Based Mobile Podcasting Architecture Supporting Multi...

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2nd international conference on Principles, systems and Applications of IP Telecommunications (IPTComm 2008)

作者： Cartas, Rodolfo Kampmann, Markus Perkuhn, Heiko Espino, Juan Miguel Ericsson Res Ericsson Allee 1 D-52134 Herzogenrath Germany Rhein Westfal TH Aachen Commun & Distributed Syst D-52062 Aachen Germany

ISBN: (纸本)9783540890539

Podcasting is an automatic content distribution mechanism that has gained popularity in the last couple of years. It differs from traditional vertical integrated media distribution such as Radio and Television in that 1) content, is periodically made available over the Internet;and 2) media consumption takes places in computers or digital media players. This allows users to escape front the established schedule-based media experience and linear structure of broadcast programs. Content aquisition through podcasts can lead to scalability problems,, when the number of subscribers grows quickly. The reason is that, each client, polls periodically for new content, usually about once per hour. It is expected that with the transformation of cell phones into portable information devices, this kind of services will be also used in mobile networks. This becomes a problem as bandwidth resources in these networks are scarce. In this paper we present an Advanced Podcasting Service that aims to reduce bandwidth usage maintaining an actual podcast subscription inside the network and reducing podcast distribution impact by selecting an appropriate delivery mechanism, such as multicast, while transparently supporting existing podcasting applications. To do so, the proposed architecture uses the IP Multimedia Subsystem (IMS) and the Multimedia Broadcast/Multicast Service (MBMS), both born from the efforts of the Third Generation Partnership Project (3GPP). Finally, the proposed architecture was implemented and evaluated in a local testbed.

关键词： Digital storage

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