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Software defined networks
Denisov, Artem ; Horváth, Tomáš (referee) ; Tomašov, Adrián (advisor)
The content of this work is a description of the ONOS controller for software defined networks (SDN) and the design of laboratory tasks to demonstrate the activities of the controller. Part of the work is also a description of the basic technologies on which the operation of SDN mechanisms and the use of VxLAN technology in these networks is based. Next, the described principles will be tested in terms of network infrastructure virtualization.
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Design of computer exercises for security of information systems
Nakládalová, Kateřina ; Tomašov, Adrián (referee) ; Myška, Vojtěch (advisor)
Nowadays, many services are provided in an online environment through web applications. A large amount of data and sensitive information is thus transmitted through cyberspace, which can be stolen by attackers if the systems that handle it are not sufficiently secure. Education in Information Security is therefore crucial. To this end, a web application in the Java programming language was therefore created to demonstrate attacks aimed at it. The application is constructed using Spring framework and connected to PostgreSQL database. The most common attacks on web applications are demonstrated and described in this thesis which are Brute force attack, SQL injection attack, Cross-site scripting attack and Cross-site request forgery, access control vulnerabilities, sensitive data exposure, data inconsistency in web application and interference with web application parameter manipulation. Specific ways of implementing protection against these attacks are given to ensure their safe use. This work can be used as a useful source of information for web application developers and users who want to gain knowledge about the issues of cyber attacks and thereby reduce the risk of their occurrence.
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Data processing from fibre optic temperature sensors
Carboch, David ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The bachelor thesis is dealing with fiber optic sensor systems, their division and properties. Furthermore, the thesis discusses the possibilities of fiber optic measurements in the nuclear power environment. Then the thesis contains possible methods of temperature measurement and their comparison. The thesis deals with the design of the sensing probe. Through the probe, the mechanical resistance of the sensing fiber and the handling of the sensing fiber have been improved. Furthermore, the thesis deals with the creation of an interactive chart of the relative temperature of a nuclear reactor in real time. In the chart, the dependence of reactor temperature change on reactor power and air temperature change can be observed. The measured results can be exported from the chart.
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Automated coffee roaster with a sensor system
Halaš, Marek ; Münster, Petr (referee) ; Tomašov, Adrián (advisor)
The aim of this work is to design and build a portable coffee roaster with a sensory system. First, the work describes the types of roasters and a description of what happens to the coffee beans during roasting. The next part is focused on the actual design and construction. Designs are given here, and individual components and their connection to the development board are also described here. It also includes software that controls roasting and can perform the entire roasting process, from start, to finish.
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Accelerated sensor data analysis using an embedded system with a graphics processing unit
Maczkó, Adam ; Myška, Vojtěch (referee) ; Tomašov, Adrián (advisor)
The thesis deals with two main goals, namely the acceleration of data analysis and the subsequent visualization of this data. The purpose is to speed up the supplied application so that it is suitable for protecting optical infrastructures through real-time analysis of polarization state changes and visualization of its outputs. The thesis describes topics that are important in terms of accelerating computations on the graphics processor, particularly principles of parallelism, parallel programming, processes, threads, and parallel architectures. In addition, the thesis describes the capabilities of the Jetson Nano platform. The output of the thesis is an application that is capable of performing computations on the graphics processor and has a web interface for visualizing the analyzed data. The PyTorch library was used for acceleration on the graphics processor. Visualisation was achieved through the React framework in conjunction with the react-spectrogram and ApexCharts libraries.
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Distributed acoustic sensing system data analysis applied for perimeter protection
Senčák, Jakub ; Dejdar, Petr (referee) ; Tomašov, Adrián (advisor)
Táto práca sa zameriava na snímanie optických vlákien pomocou distribuovaného akustického snímania. Cieľom bolo vytvoriť multiplatformovú aplikáciu na vizualizáciu údajov získaných zariadení Optasense ODH-F. Táto práca bola motivovaná nedostatkom aplikácií s otvoreným zdrojovým kódom na vizualizáciu pre snímanie pomocou optických vlákien. Práca vysvetľuje distribuované akustické snímanie a efekty rozptylu svetla, ako je Rayleighov, Ramanov a Mandelsamov-Brillouinov rozptyl. Výsledkom práce je webová aplikácia. Aplikácia sa skladá z dvoch hlavných častí - server napísaný v jazyku Python a klientská časť implementovaná vo frameworku Svelte. Výsledky tejto práce možno použiť ako základ pre vytvorenie vizualizačného softvéru pre distribuované akustické snímanie.
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Anomaly and threat detection in audit logs using machine learning
Ludes, Adam ; Ježek, Štěpán (referee) ; Tomašov, Adrián (advisor)
Tato práce představuje softwarové architektury založené na cloudu, techniky detekce anomálií, strojové učení a analýzu dat za účelem vytvoření modelu pro detekci anomálií v audit lozích z Red Hat OpenShift Container Platform. Jsou představeny statistické metody a analýza časových řad pro detekci anomálií, zatímco jsou implementovány a hodnoceny modely strojového učení a techniky předzpracování dat. Výsledky ukazují omezení tradičních modelů při zpracování anomálií v hluboce vnořených datech, zatímco model zpracovávající přirozený jazyk prokazuje robustní výkon. Tato práce poskytuje cenné poznatky a může být použita jako reference pro výzkum i praxi v oblasti softwarových architektur založených na cloudu, detekce anomálií, strojového učení a analýzy dat.
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Secured transfer of digital messages
Horký, Matyáš ; Juráň, Radovan (referee) ; Tomašov, Adrián (advisor)
Diplomová práce zkoumá alternativní přístup k e-mailu. Ten, i když je nejběžnější a univerzální způsob komunikace přes internet s téměř kýmkoliv online, ať jde o soukromou osobu nebo organizaci, trpí technickými i praktickými problémy, jakými jsou například absence soukromí nebo spolehlivosti. Práce hodnotí ekosystém e-mailu, spolu s aktuálním stavem kryptografie, a navrhuje nový protokol a datový formát který by mohl být použit téměř transparentně. Protokol je postavený nad mTLS a PKI; definuje konkrétní zprávy které mohou být použity k dohodnutí přenosu dat mezi klienty a servery. Datový formát je vlastní lineárně čitelný binární formát, strukturovaný způsobem hlavička–délka–data. Výsledek je vyhodnocen jeho přínosy a nevýhodami, spolu s obecným zamyšlením o důležitosti a místu e-mailu v současném internetu.
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OTDR optical path analyzer
Šimková, Barbora ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The aim of this master's thesis was a theoretical analysis of OTDR issues, analysis of OTDR device components, as well as basic parameters of this device. The thesis also includes a theoretical analysis of reflections, scattering, and various types of connectors. In the practical part, a circuit design for OTDR measurement was developed and subsequently implemented. The circuit was realized using the Red Pitaya development board and Koheron laser. Additionally, a circuit for direct method measurement was also created. In the LabView development environment, a program was created, including a graphical user interface. A laboratory task was also designed to provide a basic understanding of OTDR measurement issues.
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