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Extension of the Monitoring Probe with Wi-Fi Support
Findra, Michal ; Tisovčík, Peter (referee) ; Orsák, Michal (advisor)
The purpose of this work is to study Wi-Fi networks and their security and to create an extension for network probe, which is able to catch and analyze Wi-Fi traffic developed by The Accelerated Network Technologies (ANT) research group on FIT BUT. Study of software flexprobe components are described with proposal of wireless extension. Wi-Fi standards are described with their flaws and tools to crack Wi-Fi security with ability to intercept traffic on specific network. Implementation of wireless extension with testing is described in the last part of this thesis.
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Automation of MitM Attack on WiFi Networks
Vondráček, Martin ; Lichtner, Ondrej (referee) ; Pluskal, Jan (advisor)
Tato bakalářská práce se zaměřuje na výzkum v oblasti bezpečnosti bezdrátových sítí. Práce přináší studii široce využívaných síťových technologií a principů zajištění bezpečnosti bezdrátových sítí. Analyzované technologie a způsoby zabezpečení trpí slabinami, které mohou být zneužity k provedení útoku MitM . Práce zahrnuje přehled dostupných nástrojů zaměřených na využití jednotlivých slabin. Výsledkem této práce je balíček wifimitm a CLI nástroj, oba implementované v jazyce Python. Balíček poskytuje funkcionalitu pro automatizovaný útok MitM a může být použit jako součást dalšího software. Nástroj wifimitmcli je schopen úspěšného provedení plně automatizovaného útoku bez jakéhokoli zásahu útočící osoby. Tento výzkum nachází využití v oblasti automatizovaných penetračních testů a forenzního vyšetřování.
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Security of wireless computer networks
Jelínek, Martin ; Pelka, Tomáš (referee) ; Doležel, Radek (advisor)
The master's thesis deals with the issue of Wireless Local Area Network (WLAN) from the viewpoint of the security and functional principle of security mechanisms. The transition to the issue concerning the security is accompanied by the methods of wireless data transmission operating on the level of physical layer (FHSS, DSSS, OFDM, MIMO), which is followed by the summary of individual 802.11 standards. The next part deals with the issue of shared transmission medium (CSMA/CA), influence of interference and correcting mechanisms (RTS/CTS). Within the security, the principles of the authentication along with the commonly used methods of security (WEP, WPA, WPA2) are described in detail. The first part concerning security deals with the security in the form of the WEP protocol, which is considered insufficient nowadays and points out the imperfect implementation and the consequent risks. The following part describes the security in the form of WPA which eliminates the implementation weaknesses of the previous WEP security protocol. The description of commonly used mechanisms of authentication (PSK, 802.1x), required temporary key management (PTK, GTK), data integrity (MIC) and encryption which uses TKIP protocol are also included. The last part, possible WLAN security, is aimed at the full support of 802.11i standard, which is called WPA2 (sometimes RSN). That part describes the basic encryption security element CCMP, which is based on the AES block cipher modes. The practical part of the thesis deals with the security verification of current wireless networks. In the process of verification the accessible HW means and programming tools of Open Source Software (OSS) are used. By means of verification it has been pointed out that there are possible security risks resulting from the security method which has been used. Also several recommendations how to reduce the security risks of the used method to minimum are mentioned.
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Wireless Fidelity Networks
Jäger, Vítězslav ; Plchot, Oldřich (referee) ; Koch, Miloš (advisor)
Purpose of my Bachelor‘s thesis is to inform about general problems of wireless networks. My work is giving overview about using standards. It Analyzes the most common of them and focuses on their architecture and safety. Part of my work will be a creation of the wireless network for needs of a high school.
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Wireless Network Aspects
Klein, Lukáš ; Neugebauer, Petr (referee) ; Kříž, Jiří (advisor)
This Bachelor’s thesis deals with the issue of wireless networks. It explains basic terms and classification of wireless networks. It also describes the international standard IEEE 802.11 and its extensions. Closed attention is given to the security of wireless networks including safety recommendations for each group of networks.
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The Use of GPU to Searching for the Secured Wireless Network Keys
Tyrala, Radek ; Pospíchal, Petr (referee) ; Jaroš, Jiří (advisor)
This bachelor thesis proposes an analysis of wireless networks security with a particular focus on Wi-Fi type networks. In order to define the central elements of the thesis, let us follow a description of the main steps, namely: The characteristics of the currently applied security standards are provided together with a discussion of their weak points. A somewhat closer insight is offered into the WPA2 security standard as well as into the related breaking possibilities. A description is realized of the principle of dictionary attacks and their acceleration using parallel processing on the GPU. Another important point presented consists in a comparison of the GPU and CPU performance for an application implementing dictionary attack on wireless networks protected with the 802.11i standard.
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Concept of Wireless Network for SOŠ Podyjí
Truhlář, Petr ; Šareš, Pavel (referee) ; Koch, Miloš (advisor)
For my paper I have chosen project of a wireless network, which will be actually applied at SOS Podyji. In my paper I will deal with selection of a suitable concept of the wireless network and the functional use of the concept. In a theoretical part of my paper I will engage in wireless networks in general and in security of wireless networks. In a practical part of my paper I will select the most convenient solution, combining the chosen concept, security features and networking devices. I will select the networking devices with regard to their price.
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Wireless Network Aspects
Vrbovský, Miroslav ; Čulák, Jozef (referee) ; Koch, Miloš (advisor)
My bachelor’s thesis deals with deploying IEEE 802.11 wireless networks. In first, theoretical part my thesis familiarizes the reader with basic terminology, architecture details and 802.11 wireless networking operation fundamentals. In the theoretical part it also discusses modern practices in securing of wireless networks. Practical part contains a wireless network design for company FELS spol s r.o. .
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Wi-Fi Password Cracking
Šopf, Petr ; Tisovčík, Peter (referee) ; Orsák, Michal (advisor)
This bachelor's thesis deals with the issues of Wi-Fi networks security. The first part of thesis is about security options and issues related to those options. Next part compares most used tools for Wi-Fi attacks and lists features of those tools. Best tool is then used and software for sniffing communication between access point and client is created. Sniffing tool is created in two version, one version is used for standalone devices and another one for probe developed on FIT BUT.
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