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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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Performance Comparison of Libraries for Homomorphic Cryptography
Babjak, Pavol ; Tamaškovič, Marek (referee) ; Malinka, Kamil (advisor)
Kryptografia je neoddelitelnou súčasťou oblasti počítačovej bezpečnosti. Pri využívaní bežných kryptografických metód a operáciách nad nimi však nie sú jednotlivé dáta nijako chránené proti neoprávnenému prístupu alebo krádeži tretími stranami. Homomorfná kryptografia rieši presne daný problém, teda dokáže pracovať s dátami, ktorých obsah nepozná a súčasne vykonávať operácie nad nimi. Cieľom práce je vykonať sadu testov pre jednotlivé prostredia implementujúce homomorfnú kryptografiu rôznych schém a pomocou spúšťania rôznych typov operácií zmerať ich výkonnosť a ďalšie dôležité aspekty pri výbere najvýhodnejšieho prostredia pre riešenie daného konkrétneho problému.
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Modeling and simulation of PLC-BPL communication of smart metering in Network Simulator 3
Baranyk, Matěj ; Rusz, Martin (referee) ; Benešl, Lukáš (advisor)
n recent years BPL technology is becoming more used. Despite the technology not needing any additional cable installation it's important to make sure that using the technology itself makes sense or what the needed requirements will be. Due to this reason we opt to simulate real life scenarios and compare them with outputs from network simulator ns-3. This way we're able to recognize the usefulness of our efforts even before we make any plans to instal anything, which saves time and money. Furthermore we can use the same simulator for diagnostics of already installed BPL routes. Furthermore a laboratory measurement shall be conducted in order to increase dataset sizes and to have more data that can be compared with simulation outputs.
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Spatial Augmented Reality for Robotic Workplace
Štrof, Jakub ; Kapinus, Michal (referee) ; Materna, Zdeněk (advisor)
The focus of this work is to create projected user interface, which will complement AREditor, an application for robotic programming and also to calibrate Kinect and projector using existing calibration method. For calibration, I used the procam-calibration method, which uses projected Gray codes onto a chessboard to calculate calibration parameters. Thanks to it, virtual objects can be placed correctly into the real space. User interface was implemented using game engine Unity. By testing the interface, it was found that it helps the user to better grasp the relation between real and virtual space when placing virtual objects into the robotic workplace. It also raises user's awareness of the robot's movements when cooperating with it.
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Quality assurance of RHEL systems with a high level of security
Javorský, Lukáš ; Matěj,, Týč (referee) ; Sedlák, Petr (advisor)
Cieľom diplomovej práce je vyvinúť proces zabezpečenia kvality pre operačné systémy RHEL s vysokou úrovňou zabezpečenia. Táto práca je vedená snahou vytvoriť používateľsky prívetivé testovacie prostredie pre inžinierov kvality, ktoré im umožní jednoducho overiť funkčnosť systémových balíkov aj v prostredí zabezpečeného testovaného systému. Dosia\-hnutý výsledok bol realizovaný integráciou existujúceho softvérového portfólia spoločnosti Red Hat, konkrétne aplikáciami Image Builder a OpenSCAP, čo viedlo k vytvoreniu predpripravených zabezpečených virtuálnych strojov. Následne integrácia s aplikáciou na správu testov Testing Farm spoločnosti Red Hat slúži na zjednodušenie poskytovania cloudového virtuálneho stroja a poskytovanie zavedeného testovacieho prostredia.
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Prostředí pro automatizované testování síťových aplikací
Rozprým, Dalimil ; Setinský, Jiří (referee) ; Šišmiš, Lukáš (advisor)
The goal of this thesis is to create an environment supporting complex automation of network application testing. Testing of network applications poses some challenges not necessarily present in other software testing. The necessity of working with network architectures containing various interconnected devices is an example of those challenges. This text first outlines examples of the network applications which the environment is suited for, and then focuses on the envirnment itself. Subsequently, the technologies which the environment depends on, its design, details of its implementation and opportunities for extension are discussed. The environment for network application testing automation mainly focuses on solving challenges consisting of running the automation on GitLab CI/CD platform, distribution of data about testing environment to the tests themselves, and actually connecting the physical devices in testing netwrork. Due to the dynamic of new network application development and the introduction of new hardware into network architectures, the design of the environment focuses mainly on its extendability.
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Development of rhythmic sense of preschool children in a heterogeneous group
Šumpíková, Magdaléna ; Kmentová, Milena (advisor) ; Hons, Marie (referee)
The bachelor's thesis deals with the development of rhythmic sense in preschool children in an age-heterogeneous group. A field study was carried out in a nursery school to investigate the development of rhythmic sense in individual children over a period of three months. The thesis is divided into two main parts: theoretical and practical. In the theoretical part, the thesis focuses on musical rhythm and its components, the sense of rhythm and how to develop rhythmic sense, and the issue of rhythmic sense diagnosis. The practical part describes the characteristics of the researched group, the course and results of the field research framed by the individual diagnosis of rhythmic sense of children in kindergarten. The aim of the research is to verify the validity of the existing test of rhythmic sense according to Miloš Kodejšeka with a new musical component (songs) in children aged 3-5, for whom the existing test has not been used before. This test proved to be almost functional in the research, except for one item and part of the non-continuous scoring scale. During the research period, the rhythmic sense shown by the pre- and post-test improved in almost all children.
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Testing communication protocols using mobile technologies for the Internet of Things LTE-M and NB-IoT
Bartko, Samuel ; Dvořák, Radim (referee) ; Možný, Radek (advisor)
This thesis focuses on a comprehensive investigation and evaluation of the currently widespread communication protocols in the dynamically developing IoT sector (Internet of Things). With the proliferation of IoT, there is a need to create new technologies for efficient interconnection of hysical and digital worlds. The main objective of this work is to test and evaluate the suitability of use and optimal configuration of communication protocols in the context of the latest implementations of mobile technologies for IoT, namely LTE-M (Long-Term Evolution Machine Type Communication) and NB-IoT (Narrowband Internet of Things). This thesis investigates and evaluates the current communication protocols for the Internet of Things (IoT), focusing on LTE-M and NB-IoT. It includes a theoretical perspective on IoT, description of mobile technologies and analysis of protocols such as MQTT, CoAP and LwM2M. A practical part is devoted to testing and optimization of these protocols. The result of the work is providing\break a comprehensive overview and practical recommendations for use and configuration communication protocols in the framework of NB-IoT and LTE-M technologies.
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Opensource firewall redundancy
Škurla, Tomáš ; Zeman, Václav (referee) ; Slavíček, Karel (advisor)
This diploma thesis deals with the comparison of different open-source firewalls from the perspective of high availability topology. The goal of the thesis is to determine the most suitable firewall for implementing a topology with high availability. The theoretical part deals with the explanation of the concepts of address translation, the operation of firewalls, and subsequently describes the protocols necessary for the implementation of high availability, followed by a description of the testing using GNS3. The practical part of the thesis describes the preparation of the laboratory environment, as well as the process of configuration and testing of the individual firewalls, followed by an evaluation based on the test results.
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Design and implementation of a platform for control LLC-type inverter with a wide input supply voltage range using a FPGA circuit
Pokorný, Ondřej ; Levek, Vladimír (referee) ; Prokop, Roman (advisor)
This master’s thesis deals with the emulation of LLC converter control with a wide input voltage range using a created emulation platform. The first part of this work is focused on the design of resonant converters with a wide input voltage range. Based on theoretical knowledge, an adjustment of the emulation LLC converter is made. The converter modification is concluded with a simulation, where the correctness of the design and the fulfillment of the ZVS parameter in the entire input voltage range are verified. In the next part of the work, an analysis of the control issues of resonant converters, more precisely LLC type resonant converters, is carried out. The acquired knowledge is used for the design of a new emulation platform, which will serve for the emulation of LLC converter control with a wide input voltage range. The last part of the work is the creation of an emulation program for FPGA in SystemVerilog language. The work is concluded by verifying the functionality of the emulation on physical hardware.
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