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Cyber security analysis of photovoltaic systems for apartment buildings
Škoviera, Tomáš ; Kohout, David (referee) ; Mikulášek, Michal (advisor)
This bachelor thesis focuses on the security problem of a photovoltaic power plant, which is connected to the internet in order to configure it and remotely monitor statistics on electricity production and consumption. A photovoltaic system with an inverter from a selected company with parameters suitable for a small apartment building or a similarly sized building was analyzed. The main objective of the work is to analyze the communication interfaces and protocols through which the inverter communicates, in order to determine whether it is safe from a cybersecurity point of view to have such a system connected to the Internet. The work also includes performing several flooding attacks on the inverter to see if the inverter is able to detect that it is under attack and defend against it appropriately.
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IEC 60870 communication simulation
Calábek, Tomáš ; Kohout, David (referee) ; Bohačík, Antonín (advisor)
This bachelor thesis focuses on the development and implementation of a simulator for the IEC 60870 communication standard, specifically for IEC 60870-5-101 and 104 protocols. The aim is to create a unified control interface capable of simulating both the client and server side of these protocols, which are essential in the energy sector for reliable and efficient communication between devices. The theoretical part of the thesis provides a detailed study of IEC 60870 protocols, SCADA system and equipment operation in the power sector. It also considers the comparison of IEC 60870 with other standards used in the power sector. The practical part includes the design and implementation of a simulator that allows for complex control, including the configuration of the output data flow (e.g. data/query periodicity or range of values generated). The final part of the work deals with testing and comparison of the simulator with another solution.
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Communication in Smart Metering
Coufal, Jan Petr ; Kohout, David (referee) ; Mlýnek, Petr (advisor)
The goal of this bachelor thesis is to explore modern communication technologies for secure smart metering, relevant both technologically and legislatively. The thesis includes an analysis of available methods for remote communication with smart meters and their security measures. The thesis also presents three laboratory exercises. The first exercise focuses on smart meters and their PLC communication, the second on emulating smart meters using the DATEL program, and the third on data reading from smart meters using an optical probe. These exercises allow students to practically apply theoretical knowledge.
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Implementation of Smart Electricity Meters in an Energy Polygon
Kopřiva, Lukáš ; Benešl, Lukáš (referee) ; Kohout, David (advisor)
This bachelor's thesis is focused on the design and realization of communication branch for energy polygon. In the theoretical part of this thesis is descibed electric power transmission of the Czech republic, theory of standards DLMS/COSEM and IEC 60870, which are important for making of communication branch. In this part is also described existing energy polygon on BUT. Into this existing polygon is the communication branch implemented. Part of theorecical part is describtion of the data transfer design between the mentioned standards. In practical part were made program for reading data from smart electricity meters and their subsequent transmission to SCADA system. Part of the practical part is also breakdown of captured communication, which represents normal traffic of the communication branch.
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Deployment and Licensing of an Application on GitHub Packages
Misskii, Anton ; Ilgner, Petr (referee) ; Kohout, David (advisor)
Práce se zaměřuje na platformu pro verzování GitHub, konkrétně na její službu GitHub Packages. Cílem je automatizovat proces sestavení ukázkové Java aplikace pomocí grafického rozhraní JavaFX a nástroje Maven na platformě GitHub. To zahrnuje nasazení na GitHub Packages a zajištění, aby bylo možné aplikaci efektivně aktualizovat. Kromě toho musí aplikace obsahovat systém pro verzování a licencování k ochraně softwaru. Dalším klíčovým cílem je popsání a implementace modulárního systému, který byl zaveden v Java 9, který nabízí rozšířené možnosti pro vývoj a distribuci aplikací. Implementací těchto systémů a nasazením aplikace na GitHub Packages projekt sleduje vytvoření komplexní metodologie pro vývoj moderních aplikací, integraci bezpečnostních systémů, udržování spolehlivého systému verzování aplikací a kontinuální doručování a distribuci aplikací prostřednictvím populárních služeb.
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Cybersecurity analysis of hybrid photovoltaic systems for single-family homes
Svoboda, Vojtěch ; Kohout, David (referee) ; Mikulášek, Michal (advisor)
The bachelor thesis deals with analysis of the cybersecurity of photovoltaic systems for single-family houses. The aim of the thesis was to introduce hybrid photovoltaic systems, possible cyber attacks on these systems and to perform a sample attack on a PV system. The thesis consists of a theoretical and a practical part. The bachelor thesis contains four chapters. The first and second chapters describe the concepts related to cyber attacks and PV systems. Chapter three deals with the Solax X3-Hybrid inverter, its characteristics, vulnerabilities and the communication protocols used. The fourth chapter includes testing of the LAN and Wi-Fi dongles through which the inverter communicates.
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Membership in the sport association
Poláková, Kateřina ; Kohout, David (advisor) ; Svatoš, Martin (referee)
Membership in the sport association Abstract This thesis deals with the issue of membership in an association from the perspective of the applicable law and analysing the internal regulations issued by the associations themselves. The aim of the thesis is to comprehensively present the matters of membership in an association as the most common legal form active in the sports environment. The first part of the thesis is dedicated to the Right of association, on which the law of association is based. As well as the related issue of voluntary membership of athletes in sports organisations. The legal regulation influencing the form of sports associations is presented in the second part of the thesis. Attention is not focused only on the Civil Code as the leading document of the association law, but also on the Act on the Support of Sport and other regulations. The main association's regulation is the articles of association, which specify the association internal order. The association cannot be in existence without the articles of association at all. The internal regulations issued by the association also have an important position in the association, but their binding is not result from the Civil code. Previously it briefly introduces the association itself and the subsidiary association. Afterward it...
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Interactive web application for displaying of rainfall maps
Soboňa, Jakub ; Kohout, David (referee) ; Bubniak, Milan (advisor)
Táto bakalárska práca sa zaoberá vytvorením interaktívnej webovej aplikácie pre zobrazenie zrážkových máp. Zrážkové mapy sú vytvorené z dát nameraných sieťou komerčných mikrovlnných spojov, preto sa teoretická časť zaoberá mikrovlnnými spojmi a oportunistickými meraniami zrážok. Frontend aplikácie je spravený použitím JavaScriptovej knižnice React spolu s HTML a CSS. Backend je spravený použitím Node.js a Express.js. Implementácia a funkcionalita tejto aplikácie je ukázaná v práci.
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Professional ice hockey player contracts
Přibyl, Jakub ; Kohout, David (advisor) ; Svatoš, Martin (referee)
Professional ice hockey player contracts Abstract The topic of this thesis is professional player contracts in ice hockey. It is a very specifically chosen topic of the thesis, the main aim of which is to analyze the subject of individual player contracts. In order to achieve this, however, it was necessary to first set out the smaller sub- objectives of the thesis. These minor objectives will help to introduce the subject in a sufficient manner and also serve as a basis for the subsequent analysis of the problematic provisions of the players' contracts. The minor objectives were to set out the concept of "sport" and its division, to point out the insufficient legal regulation of professional sport in the Czech Republic and to compare activities of a professional hockey player with employment status and with entrepreneurship. In the las and main chapter, I aimed to analyze in detail the professional player contracts in ice hockey, their individual arrangements and to point out the problems caused mainly by the absence of legal regulation of professional sport and the autonomy of the will of the parties, especially the stronger party, the ice hockey club. Key words: player contract, professional sport, ice hockey
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Secure reading of smart meters
Chaloupková, Denisa ; Mlýnek, Petr (referee) ; Kohout, David (advisor)
The work deals with the implementation of the secure push mode of the DLMS standard. It introduces the DLMS/COSEM standard, contains a theory for message security and describes how push works and its attributes. The Gurux library in Java is used and the example gurux.dlms.push.listener is modified. The Raspberry Pi platform is used as the server. Wireshark and the Gurux DLMS Translator available in Gurux GXDLMSDirector were used to verify security of a push message. Subsequently, push messages are compared in terms of their size according to the type of security used. The larger the content of the data sent in the message, the smaller the additional data needed to secure the messages in proportion to the total volume.
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