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Wireless Security Audit
VRÁTNÝ, Jan
This bachelor thesis deals with security problems of wireless networks, also known as Wi-Fi. The purpose of the thesis is to explain the concept of Wi-Fi network, from what components it is composed, introduce safety devices used in wireless networks, and perform a research in a selected city in a specific location with the largest concentration of people if the wireless networks are secured and if they are what type of security is used. In a domestic environment an illustrative attack will be made on a Wi-Fi network secured by 128-bit WEP key. Also I will describe a new security bug that was discovered at the WPS function. Furthermore, this bachelor thesis will focus in detail on a local business, which in addition to conventional LAN extensively uses Wi-Fi network. An analysis of the security of the Wi-Fi network will be performed and the results will be evaluated to show the economic impact on the company if it were to be subjected to an attack in which sensitive data are leaked.
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Design wireless network in the company including radio survey
Kopecký, Matěj ; Pavlíček, Luboš (advisor) ; Šolc, Jiří (referee)
My bachelor thesis focuses on IT infrastructure of business environment, followed by a proposal of solution (deployment of transmitters, connection to existing infrastructure, budget), which is complemented by real deployment of typologically similar or same solution, including radio surveys before and after the deployment. Thesis is divided into several parts. Introductory chapters deal with theoretical concepts, definitions and standards that are important to become familiar with the topic. Theoretical part is followed by practical part that contains detailed information on above sections. Goal of my thesis is to propose the most effective solution for specific organization. In this paper I'll try to avoid all known usual problems and errors. I'd like to achieve this thanks to my long experience with wifi as I've for several years run a wireless network with more than 600 users.
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Design and construction of modern data Wi-Fi networks for ISPs
MATLAS, Jiří
The topic of Wi-Fi networks (Wireless Fidelity) is widely discussed currently as there is a big boom of this technology. The Wi-Fi refers to a method of modern technology that enables wireless transmission of data between devices such as printers and mobile phones. The main objectives of the thesis are focused on the development proposal to build a modern data network for an ISP (Internet Service Provider) in the technical area. Another aim was to process and analyze the results of the newly formed economic entity and their subsequent evaluation in recent years, i.e for the years 2008 - 2011. Business plan was designed in Branišov, which is a village near Czech Budejovice in 2001. Initially, it was the agreement of two local residents who believed that the offer of an Internet connection is not ideal for this location and started to develop some "small" wireless network. At the beginning, any professional equipment was not used in this network. When connected with an increasing number of customers (about five inhabitants of Branišov), professional antennas and access points began to be used. The above mentioned five customers manage to cover all operating costs created by the network. In subsequent years, i.e. 2004 ? 2007, there was a boom of the project. The number of connected users was growing constantly, even though not conducted any marketing or promotional activities. By the end of 2006, individual users began to demand greater guarantee of a stable connection. At the same time, it also proved to be absolutely necessary to establish a specific person responsible for the network. This person was supposed to maintain the network, develop it and manage it. In 2007, the initial non-commercial network was transformed into a commercial network model and brand new commercial entity ? a limited liability company ? was created. Currently, there is a continual development of this network, which already covers a total of 30 villages around České Budějovice and Vodňany and the signal spread through 115 broadcasting Access Points.
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Design of nrmetwork infrastructure, ICT and application platfo for a small company.
Hurych, Tomáš ; Palovský, Radomír (advisor) ; Pinkas, Otakar (referee)
This bachelor work deals with the design of a network infrastructure for a small company. Designing a network infrastructure consists of a link between two workplaces using a wireless connection and a realization of active and passive elements on both places of work. The thesis further looks into a design and realization of an application server in the MS Windows Server environment and a data storage running on a Linux kernel. That was achieved by the analysis of possible solutions of customer requirements, selection and putting the best of them into practice. The main contribution of this work is the design of a secure, functional and an affordable solution for a small company. The work is divided into three logical aggregates. At first it analyzes the current situation of the company and the specification of its requirements. It also discusses theoretical solutions for given requirements and last but not least it includes a suggestion for their solution.
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Problem of security wifi nets
PŘITASIL, Miroslav
This diploma thesis describes the secure wireless data transfer mediated by various technologies. A special attention is given to standards 802.11x, different kinds of technologies protection originating of the standards and to possible attacts targeted against them. Moreover, it deals with the problems related to password and sensitive data protection which are important to the network administration. The thesis gives also some examples of particular network type securing.
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Broadband Internet access in the Czech Republic and in selected EU country
Hejcman, Marek ; Toman, Prokop (advisor) ; Exnarová, Anna (referee)
This work focuses on the phenomenon of modern society on behalf of the Internet and its technological background. Especially towards the end users. The introduction describes the brief history of the Internet. Since the first small networks to expansion throughout the world. The second part is devoted to various technologies through which users can connect to the Internet. Pivotal part of the thesis analyzes the state of the market in the Czech and Slovak Republic and stresses the importance of carefully selecting an Internet connection. Conclusion then summarizes and evaluates the previous chapters and tries to outline the future market for high-speed Internet.
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Wireless technology Wi-Fi
Chudomelka, Jan ; Pokorný, Pavel (advisor) ; Balík, Jindřich (referee)
This thesis describes a wireless technology Wi-Fi, its history, development and present state, different types of networks, security from the physical point of view and influence of the used frequency on the human organism. Furthermore, the possibility of using this technology commercially and noncommercially, EDUROAM academic network, including its access points in the world and the finding of some hotspots in the Czech Republic.
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Development and Future Prospects of Mobile Internet Connection in the Czech Republic
Bičík, Petr ; Toman, Prokop (advisor) ; Dudová, Lenka (referee)
Mobile telecommunications belong to one of the fields which still evolves and it is expected that in the future they are going to offer great benefit to the whole world. This work focuses on current and future development of mobile Internet connection in the Czech Republic. At first the technologies used to provide mobile Internet connection are described and compared and then the situation (in terms of technologies and mobile operators) in the Czech market is outlined and its possible evolution in the near future is presented. Furthermore, the tarifs of mobile operators are compared with those in place two years ago. The strengths and weaknesses of the current mobile Internet connection are evaluated based on the conducted questionnaire survey. The latest results are then analyzed and compared with the results from a previous survey conducted in 2007 as part of a bachelor's thesis, which has been further extended in this mater's thesis.
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Setting Up And Securing Enterprise Wireless Network
Balon, Lukáš ; Palovský, Radomír (advisor) ; Pavlíček, Luboš (referee)
The topic of this bachelor's thesis is to set compact view on the issues of the wireless networks, their settings and proper security in corporate environment. Wireless networks are supposed to simplify access to the internet and business data, but especially in this area, it is necessary to put forth above standard care to security policy, to protect network from external attacks. First part of this work is focused on theoretical background of the Wi-fi, basic functioning principles, history and step-by-step development of technology. Explains differences between particular standards, defines basic parameters of Wi-fi devices. Next part is focused on network security. It explains encryption methods and procedures and describes differences between ciphers. This section also deals with other possibilities, how to solve security questions. Third section deals with installation of wireless components, their proper configuration and other settings. From this text emerges, how simple to buy and how available are wireless components today. Last part id formed by series of experimental hacks into secured network, shows how simple it is to decrypt some ciphers. It proofs which ways of network security are best to use in enterprise environment.
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The availability of broadband in Czech Republic.
Lojka, Tomáš ; Toman, Prokop (advisor) ; Pavlíček, Antonín (referee)
The theme of this thesis is the availability of broadband in Czech Republic. There are described high-speed technologies in use in the first part. The most important mentioned technologies are wireless technologies and DSL technology. Next part is connected with concrete providers' offers and geographical availability of individual high-speed technologies. The second part of this dissertation is a proper exploration. This exploration is implemented by a question-form, which is about the situation of high-speed connection in respondents' households. The results are commented and then presented by tables and graphs. The testing and measurement of new Telefónica's naked ADSL service is also made in connection with changes in O2 ADSL service.
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