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Serial communication
Novotný, Bohumil ; Šilhavý, Pavel (referee) ; Martinásek, Zdeněk (advisor)
Bachelor work is focused on the issue of a serial communication interface RS-232,USB, I2C and SPI, and also discusses the use of the laboratory module for experimental purposes. Laboratory module is designed with respect to the functional elements that will resist daily use of students. This work is detailed principles of serial communication in relation to each interface. The second part is devoted to method the module structure, functions of its individual components and functional solution output connectable to an oscilloscope and other measuring devices.
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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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Optimization of Network Activity by OMNET++
Rybníčková, Eva ; Novotný, Bohumil (referee) ; Škorpil, Vladislav (advisor)
This diploma thesis deals with OMNeT++, a simulation tool for network traffic simulations. It describes its installation, basic functions and its use together with an extension INET framework. Further it shows construction of a simple simulation, its parts and analysis of the traffic output. Briefly it explains Quality of Service, which is further practically implemented in visual simulations. The paper further contains two laboratory exercises with model protocols.
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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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Multiplatform communication in access networks
Novotný, Bohumil ; Sýkora, Jiří (referee) ; Křepelka, Václav (referee) ; Škorpil, Vladislav (advisor)
Doctoral thesis deals with failure detection methods in wireless access network using distributed stochastic algorithms. A new method of detecting a fault based on the push-sum algorithm has been designed and simulated. Within the scope of the work objectives, the statistical credibility of the average push-sum protocol convergence rate representative and the effect of message loss during the calculation on the robustness of the system using this protocol were compared. Based on the acquired knowledge, the ability of the protocol to mathematically derive deviations from the real average of the values in the specified topology was demonstrated and thereby the existence of an abnormality in the network has been proved or refuted.
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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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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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High-speed Networks Analysis Using Load Tester
Yarmolskyy, Oleksandr ; Novotný, Bohumil (referee) ; Škorpil, Vladislav (advisor)
This thesis describes the design of laboratory tasks for a subject dealing with highspeed networks. The theoretical part describes Gigabit Ethernet, the typical elements in the network, such as switches and routers, RFC 2544 tests and software tools for the implementation of IXIA testing, including IxAutomate, IxExplorer. In the practical part designs are created laboratory exercises aimed at testing different options switches, routers and properties of line and network layers. The work tasks and presentations to end configuration settings IXIA programs in the form TCL scripts for each job.
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