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Analysis of Cryptographic Algorithms 802.11
Vojtíšek, Jindřich ; Sobek, Jiří (referee) ; Novotný, Bohumil (advisor)
This work deals with wireless standard 802.11, primaly about security algorithms used in them. Further there is made analysis of algorithms WEP, WPA and WPA2. This algorithms are described how coding by them works and for easier understandig are added block schemes of their principles. In practical part is realized algorithms WEP, WPA and WPA2 in program Matlab simulink. Model is complemented by graphs which shows how data changes when comming throught this systems.
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Software design for mapping of the network topology
Janura, Dominik ; Novotný, Bohumil (referee) ; Sobek, Jiří (advisor)
This thesis addresses the issues of network topology mapping, where the network consists of multiple Cisco devices. It includes theoretical knowledge in this field and closely describes possible solutions to this problem. It explains the process of design and implementation of this kind of network mapping software by chosen means. Correct function of the created application is tested on a virtual network.
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Design of Switch Used in Modern Communication Networks
Mojžiš, Ľubomír ; Novotný, Bohumil (referee) ; Škorpil, Vladislav (advisor)
This diploma thesis deals with switching components of modern communication networks. A switch architecture focused on the quality of service is described in this paper and there are two switch models designed and simulated in the simulating program MATLAB-SIMULINK. The first model is based on classic switching and the other one is controlled by neural network. A laboratory exercise suitable for communication networks education is created in this paper on the basis of designed models.
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Reliability and availability calculation propos efor the educational laboratory
Oujezský, V. ; Novotný, B.
The basic task was to define the reliability of network equipment in the Laboratory of Transport Networks which is a part of “Sensor, Information and Communication Systems” research center (SIX). The whole educational process in the laboratory depends on the reliability of network equipment and our intention is to propose a method to define availability and reliability of used network equipment. It also serves the purpose of effective and predictable equipment renewal. This article describes mentioned method.
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Multiplatform gateway for voice communication in real-time
Starzyczny, Radek ; Krkoš, Radko (referee) ; Novotný, Bohumil (advisor)
This master's thesis is focused on VoIP communications. It describes deploy of the operating system OpenWRT, analog interface of router Gigaset SX762 and GSM gateway for receiving or place calls. The paper describes the protocols involved in the communication and basic configuration elements. Deploying IP telephony enables to reduce the cost of operation and provides a number of additional functions.
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Differential electromagnetic analysis
Novotný, Bohumil ; Člupek, Vlastimil (referee) ; Martinásek, Zdeněk (advisor)
This diploma thesis studies the theory side channels, simple and differential analysis, and types of attacks on the side channel, which may be run against the cryptographic system. The thesis explains the principles of side channel attack on a possible defense against them. The second part of the thesis describes experimental work created, its individual components and their functions. The findings builds custom solutions attack the electromagnetic side channel using electromagnetic probes and the workplace equipment developed for this task. The final part of the thesis is devoted to the description of the implemented algorithm, a description of measurement, measurement results and possible modifications of algorithms implemented in the microcontroller for full automation of the attack on the device, against which the attack was conducted.
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Elektronické bankovnictví ve veřejném sektoru
Novotný, Milan Bc. ; Musil, Martin (advisor) ; Bubnová, Květa (referee)
Tato práce popisuje několik druhů produktů elektronického bankovnictví nabízených bankami působícími v České republice. Na příkladu produktů poskytovaných Komerční bankou je pak popsán způsob elektronické komunikace klienta se svou bankou a funkce, jež tento způsob ovládání bankovních účtů umožňuje. Dále jsou v práci zveřejněny výsledky výzkumu používání služeb elektronického bankovnictví k ovládání bankovních účtů obcí různé velikosti náležejících do Jihočeského kraje.
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