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MIDI to DMX signal converter for synchronizing stage lighting with live music
Hajdúch, Patrik ; Záviška, Pavel (referee) ; Sikora, Marek (advisor)
This bachelor thesis focuses on designing a device for converting MIDI signals to DMX signals. The converter runs on the ATmega328P microprocessor with the Arduino bootloader and is capable of converting Note On, Note Off, and Control Change messages into changes in the DMX output signal. For the conversion, a map consisting of three profiles is used, which is editable using a desktop app and saved on an external EEPROM. This allows the converter to be used universally with many different DMX systems. The device is housed in an enclosure with dimensions that allow it to be stored within a single rack unit. The converter allows for fully automatic control of stage lighting and other stage equipment in synchronization with music and creating complex scenes using the widely used MIDI protocol.
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Creating a modern web application
Fanta, Tomáš ; Sikora, Marek (referee) ; Benedikt, Jan (advisor)
This bachelor thesis deals with the design and development of a web application to enable the user to better understand the behaviour of critical infrastructure. The thesis describes the modern technologies that were used in the implementation. Furthermore, the thesis discusses the security risks of web applications. The main goal is to create the mentioned web application and secure it against common vulnerabilities.
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Web App for Beekeeping Hive scale
Dudar, Oleksandra ; Sikora, Marek (referee) ; Zeman, Václav (advisor)
This bachelor’s thesis deals with the design and implementation of a web application for statistical processing and visualization of data from the electronic scale of beehives. The application enables statistical processing of data and presentation in the form of graphs, with the possibility of adding notes and filtering according to data. The implementation uses modern technologies such as React and Next.js and progresses from requirements analysis and design to detailed front-end, backend and predictive model implementation.
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Denial of Service detection methods
Horský, Milan ; Zeman, Václav (referee) ; Sikora, Marek (advisor)
This bachelor thesis deals with a methodology for detecting and describing the Denial of Service (DoS) condition on a web server. The aim of the thesis is to develop and implement methods that enable effective detection of DoS attacks in an experimental network. The theoretical part focuses on the analysis of different types of DoS attacks, including their detection on the application server and network side, and discusses possible reasons for false positives. In the practical part, software tools for monitoring and analyzing server and network resources were developed and then tested against different types of DoS attacks. As a result of the work, the proposed methodology has been validated and implemented in an experimental network, which provides useful tools for improving the security and stability of web servers.
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Cloud storage secured with post-quantum cryptography algorithms
Kačírek, Tomáš ; Sikora, Marek (referee) ; Člupek, Vlastimil (advisor)
This bachelor thesis deals with cloud storage secured by post-quantum cryptography and its practical implementation. The theoretical and mathematical principles of post-quantum algorithms are presented. Furthermore, their possible implementations according to security requirements and libraries that work with these algorithms are discussed. Tests have been performed to determine the most efficient algorithms for ensuring two-party authentication, confidentiality and data integrity. Then the cloud and what advantages or vulnerabilities it has was discussed. The selected algorithms were then used in a practical implementation of cloud storage in a LAN.
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Web application module for the design of cybersecurity curricula
Hrachovina, Jiří ; Sikora, Marek (referee) ; Ricci, Sara (advisor)
Tato práce se zaměřuje na vylepšení webové aplikace REWIRE Cybersecurity Profiler integrací algoritmu strojového učení na analýzu popisů kurzů. Tento komponent umožnuje automatickou analýzu popisů kurzů a propojuje výstupní dovednostní skupiny s profily ENISA ECSF. Práce také navrhuje několik vylepšení existující aplikace a to implementaci funkčních URL, vizualizaci návštěvnických dat skrze grafy, generování popisů kurzů pomocí ChatGPT a optimalizaci prvků uživatelského rozhraní. Práce také obsahuje demonstraci aplikace a její užitečnosti v navrhování studijních programů.
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Intrusion prevention system for slow DoS attacks
Lanžhotský, Karel ; Gerlich, Tomáš (referee) ; Sikora, Marek (advisor)
This master's thesis deals with the matter of detection and prevention of flood and slow denial of service attacks. Output of this thesis is software capable of detection five attacks and five slow attack based on their signatures. At the beginning of the thesis there is an introduction to protocols used in network communication, especially these working on transport and application layer. Included in this thesis in an introduction into the matters of denial of service attacks, their description and differences between mentioned attack types. After that there is description of approaches to detection and prevention techniques to the mentioned attacks. At the end thesis is dedicated to the process of making and testing of the devised software.
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Advanced tool for generating modern Slow DoS attacks
Hrůza, Tomáš ; Člupek, Vlastimil (referee) ; Sikora, Marek (advisor)
In today’s world, cyber threats are becoming increasingly sophisticated. Those threats include SDoS (Slow Denial of Service) and SDDoS (Slow Distributed Denial of Service) attacks, which employ advanced methods to disrupt normal service operations. These attacks are particularly difficult to detect and are effective because they simulate the behavior of legitimate users with slow internet connections. The topic of SDoS attacks is relatively new and not thoroughly documented. To respond to potentially newly devel- oped attacks, it is necessary to understand the principles of currently known attacks and have the practical capability to create them in order to develop effective countermeasures in the future. This thesis focuses on the development of an advanced tool for generating modern SDoS attacks. The main contribution of this work is the enhancement of the generator to create distributed attacks, the creation of an intuitive interface, and more options for monitoring the progress of individual attacks. The theoretical part introduces the topic of internet connection establishment and explains the properties of TCP and IP protocols in detail. It then clarifies the theory of secure communication over the internet using the HTTPS protocol and provides a comparison of currently used web servers. The final theoretical section addresses the topic of denial of service, discussing some types of currently known SDoS attacks, the tools that generate these attacks, and their shortcomings. Next chapter details the implementation of functionalities, which includes performance enhancements of the tool through the use of multiple processes. The developed tool features Slow Read, Slow Next, and Slow Drop attacks, as well as the ability to combine these attacks. This is followed by a description of how a local network of virtual machines was created for the purpose of testing the implemented tool. The final chapter presents the results and effectiveness of the tool in conducting SDDoS attacks against Apache and NGINX web servers in a local network.
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Data Mining Based Web Analyzer of Job Advertisements
Wittner, Alex ; Dzurenda, Petr (referee) ; Sikora, Marek (advisor)
Cílem této bakalářské práce bylo vytvoření automatizovaného zadávání nových pracovních inzerátů pomocí vložení URL v rámci již existující webové aplikace https://rewire.informacni-bezpecnost.cz, jejíž cílem je shromažďování pracovních inzerátů v oblasti cybersecurity s podrobnou analýzou pracovních kompetencí. Pracovní inzeráty jsou analyzovány pomocí více vzorového vyhledávacího algoritmu Aho-Corasick, psaného v jazyce Java. K získávání informací ze zadaných pracovních inzerátů slouží Python skript využívající knihovnu Selenium. Výsledná implementace a webová stránka je vytvořena pomocí jazyka PHP a knihovny ReactJS využívající JavaScript.
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Detection of slow-rate DDoS attacks
Sikora, Marek ; Frolka, Jakub (referee) ; Blažek, Petr (advisor)
This diploma thesis is focused on the detection and protection against Slow DoS and DDoS attacks using computer network traffic analysis. The reader is introduced to the basic issues of this specific category of sophisticated attacks, and the characteristics of several specific attacks are clarified. There is also a set of methods for detecting and protecting against these attacks. The proposed methods are used to implement custom intrusion prevention system that is deployed on the border filtering server of computer network in order to protect Web servers against attacks from the Internet. Then created system is tested in the laboratory network. Presented results of the testing show that the system is able to detect attacks Slow GET, Slow POST, Slow Read and Apache Range Header and then protect Web servers from affecting provided services.
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