National Repository of Grey Literature 62 records found  beginprevious53 - 62  jump to record: Search took 0.00 seconds. 
Distributed P2P Data Backup System
Mészáros, István ; Herout, Adam (referee) ; Szőke, Igor (advisor)
Tato diplomová práce představuje model a prototyp kooperativního distributivního systému zálohování dat založeném na P2P komunikační síti. Návrh systému umožňuje uživatelům přispět svým lokálním volným místem na disku do systému výměnou za spolehlivé úložiště jejich dat u jiných uživatelů. Představené řešení se snaží splnit požadavky uživatelů na ukládání dat, zároveň však také řeší, jak se vypořádat s mírou nepředvídatelnosti uživatelů  ohledně poskytování volného místa. To je prováděno dvěma způsoby - využitím Reed - Solomon kódů a zároveň také tím, že poskytuje možnost nastavení parametrů dostupnosti. Jedním z těchto parametrů je časový rozvrh, který značí, kdy uživatel může nabídnout předvídatelný přínos do systému. Druhý parametr se týká spolehlivosti konkrétního uživatele v rámci jeho slíbeného časového úseku. Systém je schopen najít synchronizaci ukládaných dat na základě těchto parametrů. Práce se zaměřuje rovněž na řešení zabezpečení systému proti širšímu spektru možných útoků. Hlavním cílem je publikovat koncept a prototyp. Jelikož se jedná o relativně nové řešení, je důležitá také zpětná vazba od široké veřejnosti, která může produkt používat. Právě jejich komentáře a připomínky jsou podnětem pro další vývoj systému.
Detection of P2P Networks
Březina, Matej ; Matoušek, Petr (referee) ; Tobola, Jiří (advisor)
This document deals with design, implementation and testing of software system for detecting p2p (peer-to-peer) networks based on combination of BPF prefiltering and POSIX regular expressions packet payload matching with known p2p protocol communications. The proposed detection system includes a database with some rules of most effuse p2p protocols in format resembling to definitions for L7-filter classifier. The application is implemented in C, runs in userspace and is targeted to all POSIX compatible platforms. The combination of detector with user attached QoS controlling is complete solution for traffic reduction of common p2p protocols.
Network Synchronization of Data under OS Windows
Hellar, Jan ; Trchalík, Roman (referee) ; Očenášek, Pavel (advisor)
This thesis deals with an implementation of a tool for file synchronization over a network for OS Windows. It also illustrates what issues are associated with synchronization of files, such as collision detection and resolution and the issue of setting up connection between two devices over the internet when connected to the internet via NAT devices. Thesis presents factual implementation of collision resolver and application of methods for NAT traversal. By testing the final solution correctness of collision resolver and NAT traversal technique was verified. Results of testing are discussed and possible extensions are proposed.
Properties of the physical layer of ZigBee
Humpolík, Tomáš ; Frýza, Tomáš (referee) ; Prokopec, Jan (advisor)
The ZigBee standart works on using physical and data link layer of IEEE 802.15.4 standart. Three bands were defined (2.4GHz, 915MHz and 868MHz). There was also number of physical layers defined, each of them using one of the three bands and number of modulation and spreading functions. This thesis is focused first of all on specification 2,4GHz physical layer, which is world-wide used because this band can be used (with observace of the local rules) without license. Thesis is in its first part focused on modulation function, as well on used spreading functions and number of channels for each physical layer. In the second part is paid attention to demonstration kit by ATMEL Corporation, which enables associate a simple network in star topology and using the network for demonstration of simple functions of associated devices, and kit by Radiocrafts corporation, which is used in laboratory work. Laboratory work is focused on characteristics measurement during data transfer.
Effective data searching on the Internet
Tlusťák, Miloš ; Vlach, Jan (referee) ; Lambertová, Petra (advisor)
This master´s thesis is concerned in problematic of data searching on the Internet which is very actual. It focuses mainly how centralized, decentralized and hybrid searching work. This paper also compares advantages and disadvantages of these methods and describes principles and syntaxes of most-used search engines. Possibilities of use intelligent search agents are shown here as well. The practical part of this thesis is dedicated to development and testing of specialized application for searching. This program enable user to harvest contacts of companies in accordance to defined key-words and creates database file from obtained contacts.
Secure peer-to-peer communication system
Eliáš, Luboš ; Koutný, Martin (referee) ; Cvrk, Lubomír (advisor)
The main aim of this master's thesis is to implement a common, secure and peer-to-peer communication system. The system has ability to automatically establish and run a secure end-to-end connection. It has this ability even if a network address translator is in the way to the destination system, without need of any explicit configuration of this translator. The security procedures of this system are in a transparent manner masked from individual applications, which had to solve this challenge in their own way. A responsibility for a security is delegate to an application-independent subsystem working within the core of an operating system. The security of this subsystem is based on capturing the outbound and inbound IP packets and their authentication and encryption. The system was successfully implemented in MS Windows XP operating system, in programming language C++. Transfer rate of communication tunnel in different network bandwidth speeds was measured. Result shows, that in the case of use the system on standard PC sold nowadays is practically no decrease of the transfer rate in comparison to a common channel.
Peer-to-peer insurance
Nikitenok, Alexandra ; Ducháčková, Eva (advisor) ; Galuška, Jiří (referee)
My bachelor thesis deals with peer-to-peer insurance as a segment of the insurance industry. The aim of the thesis is to introduce the reader to the basic aspects of this field, its history and application worldwide. To do so, the thesis is divided into 4 chapters. Each of the chapters is dedicated to a different aspect of peer-to-peer insurance. The first charter incorporates peer-to-peer insurance characteristics, its history and its application in the world insurance markets. The second chapter is dedicated to peer-to-peer companies. The third chapter deals with peer-to-peer products and their characteristics. The last chapter discusses advantages, disadvantages and risks of peer-to-peer insurance and analyzes the conditions of peer-to-peer insurance application in the Czech Republic and in the world.
Bitcoin
Herzán, Jiří ; Klíma, Tomáš (advisor) ; Veber, Jaromír (referee)
Bachelor's thesis is focused on crypto currency bitcoin. The thesis is divided into three parts. First chapter is focused on cryptography, which is used for bitcoin security. Next chapter describes basic bitcoin principles and bitcoin mining. In last chapter there are practically described two methods of bitcoin mining. The aim of this thesis is to bring coherent view on given themes, especially bitcoin mining. The main goal of this thesis is trying bitcoin mining using ASIC miner and Cloud mining method. The result is a statement about mining profitability.
Podpora automatizovaného multiplatformního sdílení a synchronizace souborů
Košíček, Michal
KOŠÍČEK, M. Support for automated cross-platform sharing and files synchronization. Brno, 2013. This thesis examines the issue of sharing and synchronizing files between different types of devices. It deals with the possible tools and technologies for the realization of automated sharing. It performs analysis of applications to share data and on the basis of this knowledge determines the appropriate procedures and techniques for the implementation application for data sharing.
Formáty pro ukládání zvuku a další aspekty jejich šíření
Gabriel, Vladislav ; Pokorný, Pavel (advisor)
Zvuk je mechanické chvění, které se přenáší vzduchem. Uložen může být analogově nebo digitálně. Digitálně se zvuk ukládá do souborů různých formátů se ztrátou nebo beze ztráty informace. Ztrátové formáty se od sebe liší mírou komprese, mírou ztráty informace a datovým tokem nutným pro přehrávání. Hudební díla uložená v těchto formátech jsou většinou chráněna autorským právem a jejich šíření bez souhlasu autora je trestné. K tomuto nelegálnímu šíření se dnes využívají výměnné sítě. Ty můžeme dělit na tři podskupiny a to sítě s centrálním vyhledávačem, decentralizovaným vyhledáváním a distribuovaným anonymním vyhledáváním. Masivní využívání těchto sítí mělo za následek snížení tržeb nahrávacích společností, které se snažily tento pokles zmírnit různými prostředky (ochrana kompaktních disků, mediální kampaně, represe).

National Repository of Grey Literature : 62 records found   beginprevious53 - 62  jump to record:
Interested in being notified about new results for this query?
Subscribe to the RSS feed.