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Detection of anomalies in LoRaWAN type of wireless networks
Bahna, Martin ; Možný, Radek (referee) ; Pospíšil, Ondřej (advisor)
The present bachelor thesis deals with the LoRaWAN wireless network’s security. First, IoT is defined in general, together with its technology, its standards and relevant communication protocols. Subsequently, the LPWAN technology is outlined, as well as its requirements and protocols that are most widely used with this technology. The thesis then describes the LoRaWAN technology further, with the focus maintained on its security. Following the security analysis, the most common attacks are mentioned, and possible security incident scenarios are recounted. The practical part of this thesis sheds some light on the process of personal construction of the LoRaWAN network, together with component selection and configuration. Two attacks are then performed on the network, carried out in accordance with the given scenarios. Lastly, a method of detecting these attacks is proposed and explained.
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IEC 61850 industrial communication simulator
Srp, Jakub ; Pospíšil, Ondřej (referee) ; Blažek, Petr (advisor)
This thesis is focused on IEC 61850 communication protocols SMV, GOOSE and MMS and their implementation in SCADA systems. There is a simulator, run on Raspberry Pi, that generates data according to IEC 61850 and transmits the data using protocols in question. The simulation consist of various virtual devices e.g. surge protection, undervoltage protection, circuit breaker, disconnector, HMI. The MMS protocol is used for station control. Simulation can be user-defined from textual configuration file.
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Automated area measurement of precipitation intensity via a network of microwave links
Bubniak, Milan ; Pospíšil, Ondřej (referee) ; Musil, Petr (advisor)
Point-to-point microwave links can be utilized as a large sensor network to measure rainfall. This work deals with the application of this procedure in practice. The first part of the thesis deals with atmospheric precipitation in general and standard methods of their measurement; and the propagation of the microwave signal and various causes of its attenuation, focusing on the attenuation caused by rain and the recommendation ITU-R P.838. This is followed by a state of the art summarization of the measurement of rainfall by microwave links. In the second part of the work, a manual procedure for calculating rainfall from microwave link data is performed, taking wet antenna attenuation into account. Then the creation of a support tool in the C# language is being described, which supply the data to the functions of the RAINLINK rainfall calculation library. Several rainfall calculations that are validated by physical rain gauges are performed. Furthermore, the own Telcorain application for rainfall calculation is created in the Python language, based on the pycomlink library. It has a graphical user interface created in PyQt. Several rainfall calculations validated by rain gauges are performed again, and the results are compared with the RAINLINK library.
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Industrial automation protocols simulation
Surový, Roman ; Pospíšil, Ondřej (referee) ; Blažek, Petr (advisor)
The aim of this work is to implement a workplace that will simulate the network infrastructure of industrial automation protocols. In this work we focus on and perform analysis of industrial protocols ModBus, Profibus, Profinet, EtherCAT, CANopen. Furthermore, the network infrastructure with PLC with selected protocols will be operated. The output of the work will be a workplace that will be able to simulate real communication of two selected protocols between two and more devices. Another part of the work will be the simulation of three types of equipment occurring in an industrial environment.
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Creating an industrial scenario using WinCC Unified
Šotola, Bohuslav ; Blažek, Petr (referee) ; Pospíšil, Ondřej (advisor)
This bachelor thesis is devoted to the Creation of industrial scenario by means of using WinCC Unified. WinCC Unified is a visualization tool supporting remote access via the web without the necessity to install softwares. The urgency for using this technology results in particular from the introduction of digitization and the associated simplification of industrial processes. The issue of remote communication is discussed at first which is followed by a description of the basic functions of WinCC Unified. Then various communication scenarios are processed which are the main target of the bachelor’s thesis together with the creation of the HMI library. The work is ended by the topic of analysis of communication load between HMI and PLC depending on the number of animated objects on the HMI screen.
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Passive capturing probe for IEEE 802.11 standard
Partnov, Denys ; Pospíšil, Ondřej (referee) ; Pospíšil, Jan (advisor)
The bachelor’s thesis deals with a general description of the 802.11 protocol, where the individual layers on which the protocol works are explained and described. Attention was also focused on the possibilities of securing wireless traffic. The practical part then deals with the creation of a complete tool for passive interception of traffic in IEEE 802.11 networks. Where it is mainly about processing traffic statistics. The resulting program, written in Python, allows the user to display current information such as: number of transmitted frames, channel, band, received signal strength, and more. Subsequently, the results can be displayed in the form of graphs. As part of the test measurement, the correct functionality of the program was verified.
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ESP Speaking Activities for Students of Information Technology
Pospíšil, Ondřej ; Smutný, Milan (referee) ; Ellederová, Eva (advisor)
Pojem mluvený jazyk se hojně používá pro označení každého hlasově produkovaného jazyka i neverbální řeči. Produkce mluveného jazyka zahrnuje vyhledávání informací z paměti, vytváření plánů artikulačního programu, exekutivní kontrolu a sebekontrolu. Tyto strategie lze spojit s názvy domén dlouhodobé paměti, motorické kontroly a exekutivní kontroly. Produkce mluveného jazyka se logicky dělí na tři základní kroky: rozhodnutí, co vyjádřit, určení způsobu vyjádření a samotné výsledné vyjádření. Ačkoli dosažení cílů rozhovoru, strukturování vyprávění a modulace průběhu dialogu jsou ze své podstaty rozhodující pro pochopení toho, jak lidé mluví, psycholingvistický výzkum jazykové produkce je většinou zaměřen na formulaci jednotlivých výroků. Z tohoto důvodu hraje vyhodnocení mluveného diskurzu ve třídě důležitou roli při vytváření zásadních poznatků o komplexní povaze třídních struktur, interakcí a vztahů. Tato práce uvádí, jakým způsobem se řeč vyvíjí, jaké důležité principy z gramatického a lingvistického hlediska je nutné dodržovat a v poslední řadě se zaměřuje na rozvoj řeči s ohledem na to, že se nejedná o mateřský jazyk. Pro úspěšného mluvčího je nutné řečové aktivity rozvíjet správným způsobem. Jak má vypadat vhodná aktivita pro rozvoj řečové dovednosti mluvení popisuje poslední kapitola teoretické části této bakalářské práce a její praktická část. Všechny aktivity byly navrženy na základě dotazníkového šetření, které bylo uskutečněno mezi 69 studenty Vysokého učení technického v Brně. Aktivity jsou zaměřeny na rozvoj řečové dovednosti mluvení v oboru informačních technologií.
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Machine Learning-based Anomaly Detection in Industrial Control Systems
Tsymbal, Kateryna ; Holasová, Eva (referee) ; Pospíšil, Ondřej (advisor)
The main goal of this thesis is to design a system for anomaly and intrusion detection in industrial control systems using machine learning. The theoretical part of the thesis provides a basic theoretical overview of industrial control systems and their security. Furthermore, knowledge about anomaly detection techniques and potential challenges in this area are discussed. Lastly, the theoretical part has reviewed various solutions for anomaly detection in industrial control systems using machine learning. In the practical part, machine learning algorithms are applied to the selected HAI dataset. Finally, the findings on the suitability of the used algorithms and the possibilities for further research are summarized. The purpose of this thesis is to improve the security of industrial control systems, and the results can serve as a basis for the future development of more effective methods for anomaly detection in this area.
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Comparison of machine learning models in outdoor temperature sensing by commercial microwave link
Pospisil, Ondrej ; Musil, Petr ; Fujdiak, Radek
The main objective of this work is to focus on outdoor temperature prediction using machine learning based on parameters from commercial microwave links. This information can be used to refine the weather information at a given link location. Three machine learning models (random forest, linear regression, and lasso) are used for prediction using a combination of two datasets (ERA5 weather dataset and CML monitoring database dataset). The results were evaluated based on two evaluation metrics (R^2 and mean absolute error (MAE)). In this work, the ERA5 outdoor temperature was found to be correlated with the temperature of the microwave link unit, and results were obtained with an accuracy of 0.87144 based on the MAE metric. Thus, the results can fairly well predict actual outdoor temperatures in the microwave link area based on the microwave link unit temperature.
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