Towards a Basic DHT Service: Analyzing Network Characteristics of a Widely Deployed DHT
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Digital Fountain Erasure-Recovery in Bittorrent
UNIVERSITÀ DEGLI STUDI DI BERGAMO Facoltà di Ingegneria Corso di Laurea Specialistica in Ingegneria Informatica Classe n. 35/S – Sistemi Informatici Digital Fountain Erasure Recovery in BitTorrent: integration and security issues Relatore: Chiar.mo Prof. Stefano Paraboschi Correlatore: Chiar.mo Prof. Andrea Lorenzo Vitali Tesi di Laurea Specialistica Michele BOLOGNA Matricola n. 56108 ANNO ACCADEMICO 2007 / 2008 This thesis has been written, typeset and prepared using LATEX 2". Printed on December 5, 2008. Alla mia famiglia “Would you tell me, please, which way I ought to go from here?” “That depends a good deal on where you want to get to,” said the Cat. “I don’t much care where —” said Alice. “Then it doesn’t matter which way you go,” said the Cat. “— so long as I get somewhere,” Alice added as an explanation. “Oh, you’re sure to do that,” said the Cat, “if you only walk enough.” Lewis Carroll Alice in Wonderland Acknowledgments (in Italian) Ci sono molte persone che mi hanno aiutato durante lo svolgimento di questo lavoro. Il primo ringraziamento va ai proff. Stefano Paraboschi e Andrea Vitali per la disponibilità, la competenza, i consigli, la pazienza e l’aiuto tecnico che mi hanno saputo dare. Grazie di avermi dato la maggior parte delle idee che sono poi confluite nella mia tesi. Un sentito ringraziamento anche a Andrea Rota e Ruben Villa per l’aiuto e i chiarimenti che mi hanno gentilmente fornito. Vorrei ringraziare STMicroelectronics, ed in particolare il gruppo Advanced System Technology, per avermi offerto le infrastrutture, gli spa- zi e tutto il necessario per svolgere al meglio il mio periodo di tirocinio. -
Conducting and Optimizing Eclipse Attacks in the Kad Peer-To-Peer Network
Conducting and Optimizing Eclipse Attacks in the Kad Peer-to-Peer Network Michael Kohnen, Mike Leske, and Erwin P. Rathgeb University of Duisburg-Essen, Institute for Experimental Mathematics, Ellernstr. 29, 45326 Essen [email protected], [email protected], [email protected] Abstract. The Kad network is a structured P2P network used for file sharing. Research has proved that Sybil and Eclipse attacks have been possible in it until recently. However, the past attacks are prohibited by newly implemented secu- rity measures in the client applications. We present a new attack concept which overcomes the countermeasures and prove its practicability. Furthermore, we analyze the efficiency of our concept and identify the minimally required re- sources. Keywords: P2P security, Sybil attack, Eclipse attack, Kad. 1 Introduction and Related Work P2P networks form an overlay on top of the internet infrastructure. Nodes in a P2P network interact directly with each other, i.e., no central entity is required (at least in case of structured P2P networks). P2P networks have become increasingly popular mainly because file sharing networks use P2P technology. Several studies have shown that P2P traffic is responsible for a large share of the total internet traffic [1, 2]. While file sharing probably accounts for the largest part of the P2P traffic share, also other P2P applications exist which are widely used, e.g., Skype [3] for VoIP or Joost [4] for IPTV. The P2P paradigm is becoming more and more accepted also for professional and commercial applications (e.g., Microsoft Groove [5]), and therefore, P2P technology is one of the key components of the next generation internet. -
PSP-Auto: a DHT-Based Data Storage and Retrieval System for Automation
PSP-Auto: A DHT-based Data Storage and Retrieval System for Automation Jan Skodzik, Peter Danielis, Vlado Altmann, Eike Bjoern Schweissguth, Dirk Timmermann University of Rostock Institute of Applied Microelectronics and Computer Engineering 18051 Rostock, Germany, Tel./Fax: +49 381 498-7284 / -1187251 Email: [email protected] Abstract—In the field of automation, reliability is a key aspect which utilizes volatile rather than rarely available persistent to enable resilient systems. Especially, in areas with extreme memory as miniature devices often have a low or no memory conditions a reliable monitoring is necessary such as factory, capacity anyway. In the preliminary works [3] and [4], it volcano, or laboratory monitoring. These are environments where devices could be stressed uncommonly high and thus more devices has already been shown that a distributed memory can be could fail in a shorter time period in the worst case. Centralized realized by means of the so-called Peer-to-Peer-based Storage monitoring systems, which work in real-time for security reasons, Platform (PSP). Thereby, network elements of an Internet contain a single point of failure in the form of a central control service provider in the access network were networked to store instance. Additionally, if the central instance fails no data is configuration data. As basis, the decentralized and structured available any more as the central instance usually works as the only data sink in the system. Furthermore, with an increasing P2P protocol Kad has been applied. However, the requirements number of devices this system does not scale well. As the number in automation environments are more demanding than in access of devices and their performance will prospectively increase, a networks as automation environments require tremendously new approach is necessary to handle these large-scale systems. -
A Study of Peer-To-Peer Systems
A Study of Peer-to-Peer Systems JIA, Lu A Thesis Submitted in Partial Fulfilment of the Requirements for the Degree of Master of Philosophy in Information Engineering The Chinese University of Hong Kong August 2009 Abstract of thesis entitled: A Study of Peer-to-Peer Systems Submitted by JIA, Lu for the degree of Master of Philosophy at The Chinese University of Hong Kong in June 2009 Peer-to-peer (P2P) systems have evolved rapidly and become immensely popular in Internet. Users in P2P systems can share resources with each other and in this way the server loading is reduced. P2P systems' good performance and scalability attract a lot of interest in the research community as well as in industry. Yet, P2P systems are very complicated systems. Building a P2P system requires carefully and repeatedly thinking and ex- amining architectural design issues. Instead of setting foot in all aspects of designing a P2P system, this thesis focuses on two things: analyzing reliability and performance of different tracker designs and studying a large-scale P2P file sharing system, Xun- lei. The "tracker" of a P2P system is used to lookup which peers hold (or partially hold) a given object. There are various designs for the tracker function, from a single-server tracker, to DHT- based (distributed hash table) serverless systems. In the first part of this thesis, we classify the different tracker designs, dis- cuss the different considerations for these designs, and provide simple models to evaluate the reliability of these designs. Xunlei is a new proprietary P2P file sharing protocol that has become very popular in China. -
Emule Apk Free Download
Emule apk free download Continue The app was created to work on ED2K (eDonkey2000 protocol) networks, right on your mobile device! it's not a remote control. Disclaimer: We are not affiliated with the eMule project. Mule for Android provides basic functionality: search for files on servers, download files, share files. You can watch videos while downloading files using the preview feature. The use is simple: when you first start, select an incoming directory; Then, search for files and download them. Buy a paid version if you want to remove ads. Kademlia's initial support is here!. Search sources and keywords are available now. When you first start KAD, you need a download site (IP/port) or a node.dat file at your download location. You can download nodes.dat directly from the mule - click the download button on the preference page to the right of the KAD switch. Check the KAD status with the information button - when YOU work KAD you will see not an empty KAD table. Let me know if you have a problem. It's not a remote control. Disclaimer: We are not affiliated with the eMule project. Mule for Android provides the main features available: search for files on servers, download files, file sharing. You can watch videos when you download files with a preview feature. The use is simple: when you first start, select the input directory; then look for the files and download them. Buy the full version if you want to remove the ads. Kademlia's initial support is here!. Search sources and keywords are now available. -
Vasco Alexandre Maia Dos Santos Infraestrutura Segura E
Departamento de Eletrónica, Universidade de Aveiro Telecomunicações e Informática 2016 Vasco Alexandre Infraestrutura Segura e Descentralizada para a Maia dos Santos Internet das Coisas Secure Decentralized Internet of Things Infrastructure Departamento de Eletrónica, Universidade de Aveiro Telecomunicações e Informática 2016 Vasco Alexandre Infraestrutura Segura e Descentralizada para a Maia dos Santos Internet das Coisas Secure Decentralized Internet of Things Infrastructure “The walls between art and engineering exist only in our minds” — Theo Jansen Departamento de Eletrónica, Universidade de Aveiro Telecomunicações e Informática 2016 Vasco Alexandre Infraestrutura Segura e Descentralizada para a Maia dos Santos Internet das Coisas Secure Decentralized Internet of Things Infrastructure Dissertação apresentada à Universidade de Aveiro para cumprimento dos re- quisitos necessários à obtenção do grau de Mestre em Engenharia de Com- putadores e Telemática, realizada sob a orientação científica do Doutor Diogo Nuno Pereira Gomes, Professor auxiliar do Departamento de Eletrónica, Te- lecomunicações e Informática da Universidade de Aveiro, e do Doutor João Paulo Silva Barraca, Professor auxiliar do Departamento de Eletrónica, Tele- comunicações e Informática da Universidade de Aveiro. o júri / the jury presidente / president Prof. Doutor André Ventura da Cruz Marnoto Zúquete professor auxiliar da Universidade de Aveiro vogais / examiners committee Prof. Doutora Ana Cristina Costa Aguiar professora auxiliar convidada da Faculdade de Engenharia da Universidade do Porto Prof. Doutor Diogo Nuno Pereira Gomes professor auxiliar da Universidade de Aveiro (orientador) agradecimentos / Gostava de agradecer, em primeiro lugar ao Professor Doutor Diogo Gomes acknowledgements e ao Professor Doutor João Paulo Barraca pela oportunidade de integrar o ATNOG e trabalhar nesta dissertação, bem como por todo o apoio dado ao longo do mestrado. -
A Blockchain System Based on Quantum-Resistant Digital Signature
Hindawi Security and Communication Networks Volume 2021, Article ID 6671648, 13 pages https://doi.org/10.1155/2021/6671648 Research Article A Blockchain System Based on Quantum-Resistant Digital Signature Peijun Zhang ,1 Lianhai Wang ,1 Wei Wang ,1 Kunlun Fu ,1 and Jinpeng Wang 2 1Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Computer Networks, Shandong Computer Science Center (National Supercomputer Center in Jinan), Jinan 250014, China 2Shandong Computer Science Center (National Supercomputer Center in Jinan), Jinan 250014, China Correspondence should be addressed to Lianhai Wang; [email protected] Received 17 December 2020; Revised 23 January 2021; Accepted 1 February 2021; Published 4 March 2021 Academic Editor: Debiao He Copyright © 2021 Peijun Zhang et al. ,is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Blockchain, which has a distributed structure, has been widely used in many areas. Especially in the area of smart cities, blockchain technology shows great potential. ,e security issues of blockchain affect the construction of smart cities to varying degrees. With the rapid development of quantum computation, elliptic curves cryptosystems used in blockchain are not secure enough. ,is paper presents a blockchain system based on lattice cipher, which can resist the attack of quantum computation. ,e most challenge is that the size of public keys and signatures used by lattice cryptosystems is typically very large. As a result, each block in a blockchain can only accommodate a small number of transactions. -
Connectivity Properties of Mainline Bittorrent DHT Nodes
IEEE P2P'09 - Sept. 9-11, 2009 Connectivity Properties of Mainline BitTorrent DHT Nodes Raul Jimenez Flutra Osmani Bj¨orn Knutsson Royal Institute of Technology (KTH) ICT/TSLAB Stockholm, Sweden {rauljc, flutrao, bkn}@kth.se Abstract raises some concerns about the scalability and resilience of the technology. The birth and evolution of Peer-to-Peer (P2P) protocols Our work is part of the P2P-Next[1] project, which is have, for the most part, been about peer discovery. Napster, supported by many partners including the EBU2 who claims one of the first P2P protocols, was basically FTP/HTTP to have more than 650 million viewers weekly. In the face plus a way of finding hosts willing to send you the file. Since of such load, scalability and resilience become vital compo- then, both the transfer and peer discovery mechanisms have nents of the underlying technology. improved, but only recently have we seen a real push to In BitTorrent, content is distributed in terms of objects, completely decentralized peer discovery to increase scal- consisting of one or more files, and these objects are de- ability and resilience. scribed by a torrent-file. The clients (peers)participatingin Most such efforts are based on Distributed Hash Tables the distribution of one such object form a swarm. (DHTs), with Kademlia being a popular choice of DHT im- Aswarmiscoordinatedbyatracker,whichkeepstrack plementation. While sound in theory, and performing well of every peer in the swarm. In order to join a swarm, a peer in simulators and testbeds, the real-world performance of- must contact the tracker, which registers the new peer and ten falls short of expectations. -
Decentralized Location-Aware Orchestration of Containerized Microservice Applications
DOCTORAL T H E SIS Lara Lorna Jiménez Decentralized Location-aware Orchestration of Containerized Microservice Applications of Containerized Orchestration Microservice Lara Lorna Jiménez Decentralized Location-aware Department of Computer Science and Electrical Engineering Division of Computer Science ISSN 1402-1544 Decentralized Location-aware ISBN 978-91-7790-617-9 (print) ISBN 978-91-7790-618-6 (pdf) Orchestration of Containerized Luleå University of Technology 2020 Microservice Applications Enabling Distributed Intelligence at the Edge Lara Lorna Jiménez Pervasive and Mobile Computing Decentralized Location-aware Orchestration of Containerized Microservice Applications Enabling Distributed Intelligence at the Edge Lara Lorna Jiménez Luleå University of Technology Department of of Computer Science and Electrical Engineering Division of Computer Science Printed by Luleå University of Technology, Graphic Production 2020 ISSN 1402-1544 ISBN 978-91-7790-617-9 (print) ISBN 978-91-7790-618-6 (pdf) Luleå 2020 www.ltu.se Decentralized Location-aware Orchestration of Containerized Microservice Applications Enabling Distributed Intelligence at the Edge Lara Lorna Jim´enez Dept. of Computer Science and Electrical Engineering Lule˚aUniversity of Technology Sweden Supervisors: Olov Schel´enand K˚areSynnes ii To my parents iii iv Abstract Services that operate on public, private, or hybrid clouds, should always be available and reachable to their end-users or clients. However, a shift in the demand for current and future services has led to new requirements on network infrastructure, service orches- tration, and Quality-of-Service (QoS). Services related to, for example, online-gaming, video-streaming, smart cities, smart homes, connected cars, or other Internet-of-Things (IoT) powered use cases are data-intensive and often have real-time and locality require- ments. -
Kademlia on the Open Internet
Kademlia on the Open Internet How to Achieve Sub-Second Lookups in a Multimillion-Node DHT Overlay RAUL JIMENEZ Licentiate Thesis Stockholm, Sweden 2011 TRITA-ICT/ECS AVH 11:10 KTH School of Information and ISSN 1653-6363 Communication Technology ISRN KTH/ICT/ECS/AVH-11/10-SE SE-164 40 Stockholm ISBN 978-91-7501-153-0 SWEDEN Akademisk avhandling som med tillstånd av Kungl Tekniska högskolan framlägges till offentlig granskning för avläggande av Communication Systems fredag den 9 december 2011 klockan 10.00 i C2, Electrum, Kungl Tekniska högskolan, Forum, Isafjordsgatan 39, Kista. © Raul Jimenez, December 2011 This work is licensed under a Creative Commons Attribution 2.5 Sweden License. http://creativecommons.org/licenses/by/2.5/se/deed.en Tryck: Universitetsservice US AB iii Abstract Distributed hash tables (DHTs) have gained much attention from the research community in the last years. Formal analysis and evaluations on simulators and small-scale deployments have shown good scalability and per- formance. In stark contrast, performance measurements in large-scale DHT overlays on the Internet have yielded disappointing results, with lookup latencies mea- sured in seconds. Others have attempted to improve lookup performance with very limited success, their lowest median lookup latency at over one second and a long tail of high-latency lookups. In this thesis, the goal is to to enable large-scale DHT-based latency- sensitive applications on the Internet. In particular, we improve lookup la- tency in Mainline DHT, the largest DHT overlay on the open Internet, to identify and address practical issues on an existing system. -
Bittorrent Protocol the Mainline Dht
Università degli Studi di Pisa Dipartimento di Informatica P2P Systems and Blockchains Spring 2021, instructor: Laura Ricci [email protected] Lesson 6: BITTORRENT PROTOCOL THE MAINLINE DHT 4/3/2021 Dipartimento di Informatica Laura Ricci Università degli Studi di Pisa The Bittorrent Protocol, the Mainline DHT, 1 BITTORRENT: OVERVIEW key idea: in 2002, Bran Cohen content popularity exhibits temporal locality (Flash Crowds) e.g. CNN on 9/11, new movie/game release,... goal: efficient content distribution system initially focused on distributing content efficiently, not on searching distribute the same file to all peers throughput increases with the number of downloaders an efficient use of network bandwidth single publisher, multiple downloaders later introduce also searching functionality: Kademlia has many “legal” publishers Blizzard Entertainment using it to distribute the beta of their new game Dipartimento di Informatica Laura Ricci Università degli Studi di Pisa The Bittorrent Protocol, the Mainline DHT, 2 THE CLIENT SERVER MODEL Dipartimento di Informatica Laura Ricci Università degli Studi di Pisa The Bittorrent Protocol, the Mainline DHT, 3 BITTORRENT IN A NUTSHELL more nodes can serve the content, not only one server needs a mechanism to detect which node is currently providing the content introducing the tracker taking trace of who is currently providing the content Joe connects to the tracker announcing the content the tracker now knows Joe is providing the file only for a better visualization nodes are arranged -
Download-Emule-Kad-Server-List.Pdf
Download Emule Kad Server List Download Emule Kad Server List 1 / 3 2 / 3 web site page displaying list of all active servers on the eDonkey/eMule p2p network. ... ping test update servers list at client start download list in eMule.. 0.50a installed on my computer. I can connect to eD2K network easily but I can't connect to Kad network. I have tried to download from http://www.nodes-dat.com/ but the first button " Add to eMule (from Nodes Server)" did't work and the other two worked but the problem still remains.. Bezpieczna lista serwerów emule do pobrania. Pobierz listę zawsze aktualną. Download server.met & serverlist for eMule.. eMule now connects to both the eDonkey network and the Kad network. ... eMule will use clients it knows already from the ed2k servers to get connected to Kad .... The servers merely help hold the network together. Meanwhile, Kad is a network that is also connectable via eMule. Unlike the ED2K network, ... You can use the easy to use installer or you can download the binaries. The difference is that the .... nodes.dat nodes for emule kademlia net server edonkey overnet. ... von IP/Port im Kad-Fenster, oder. - per Download aus dem Internent, z.B. nodes.dat.. Connecting to servers hasn't been working for a long time. ... started them again (there is free drive space on the download drive) but can't get a Kad connection. ... Block4: ipfilter.dat, nodes.dat, server.met (emule-security.org). Dodaj do #eMule te 2 pliki : Do serwerów, czyli eD2k --- http://www.server-list.info/ Do Kad ---..