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Verification of PGP digital signatures
Horký, Matyáš ; Burda, Karel (referee) ; Zeman, Václav (advisor)
This bachelor thesis is focused on the interaction of OpenPGP content inside of e-mail files. It describes the history, changes and properties of PGP and e-mail and connects them into a common context. The goal is to design and implement a program for reading and verifying OpenPGP data in electronic mail, which is available as an open-source tool available as both a the command line and as a library.
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Electronic signature in practice
Blahušová, Klára ; Sikora, Marek (referee) ; Zeman, Václav (advisor)
The topic of this work is electronic signatures and their use in the European Union, while consideration is also given to nations in the European Free Trade Association (Iceland, Liechtenstein, Norway and Switzerland) and others, such as Great Britain, USA and China. Description is given of legislation governing electronic signatures, the form this takes and differences between the aforementioned countries. Each section contains a list of relevant certificate authorities for the territories discussed therein. The first part defines what an electronic signature is and the theory behind it, whereas the other is devoted to application in said territories. A summary of the information provided herein is available online via a dedicated web app.
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Web application for file encryption
Tatar, Martin ; Blažek, Petr (referee) ; Zeman, Václav (advisor)
The bachelor thesis is focused on developing a web application for file encryption. In the theoretical part symmetric encryption algorithms are divided into block ciphers and stream ciphers. Selected ciphers are described and their properties are compared. Then the modes of operation for block ciphers are described. The developed application encrypts both files and text inputs by the selected algorithm and can operate in various modes of operation. In addition to this functionality the application is supplemented with descriptions of available ciphers and modes of operation.
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IoT WiFi soil moisture and temperature sensor
Kostelanská, Alžbeta ; Zeman, Václav (referee) ; Škorpil, Vladislav (advisor)
Bachelor thesis addresses the subject of IoT WiFi soil moisture sensor and temperature sensor based on ESP32 platform. The primary focus of the design is on low power consumption of the device and secure communication. The theoretical part of the thesis describes selected types of sensors which can be used for the designed device. The ESP32 module and some of its features are also introduced. Lastly selected communication protocols which are suitable for IoT applications and can be used with WiFi peripheral are discussed. The practical part of the bachelor thesis deals with hardware design of the sensor device and implementation of this design. Low power consumption is implemented in hardware and in software solution. The focus is on independence of the device and secure communication and data protection. Lastly the concept of webserver used for storing and processing collected data on RaspberryPi platform and concept of sending the measured data to the end-user are introduced.
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Software support for alarm security system design
Kutnar, Václav ; Zeman, Václav (referee) ; Burda, Karel (advisor)
Intrusion alarm systems are an important part of quality security of residential, commercial, and other types of buildings. It is necessary to sufficiently and broadly asses the object and its surroundings. This bachelor's thesis proposes a methodology that should help with this designer. The thesis first discusses the general procedure of system design, relevant standards, then the elements of mechanical security of buildings, and burglary statistics in the Czech Republic. Based on this information, a methodology is then developed and software implemented, which, based on the entered information, will provide the designer with information important for the quality design of the system. These include possible object vulnerabilities, potential intrusions, the security level of the system, and more.
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Modbus WiFi for pyrometer communication in a foundry
Moravčík, Adam ; Zeman, Václav (referee) ; Slavíček, Karel (advisor)
The bachelor's thesis focuses on the design of a method for connecting a pyrometer communicating via the MODBUS RTU interface to a WiFi network in the environment of the Brno foundry. The first part is devoted to the MODBUS protocol, its structure, principles, and possibilities of connection to the TCP / IP network, which is also used in WiFi. The second part is focused on an overview of available single-board computers and microcontrollers suitable for the implementation of the design. The third part deals with the hardware design of the device which realizes the connection of the pyrometer to the WiFi network. It describes the meaning of individual parts and the way of their interconnection. The fourth part deals with the software design of the program. It describes the individual blocks of the program and their function. The fifth part deals with testing the device using the simulation programs "Modbus Pool" and "Modbus Slave".
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Network infrastructure design
Tobolka, Lukáš ; Člupek, Vlastimil (referee) ; Zeman, Václav (advisor)
The aim of this diploma thesis is to look at the design of network infrastructure in practice. There are individual procedures, brands, standards that must be followed when designing. It includes a brief general overview of terminal elements, cable systems and related matters. In general, methods for measuring optical lines and parameters for measuring metallic networks are described here. The possible complications that accompany it are briefly described in the implementation. The network design methodology is also described here on the example of a specific object. Before the actual handover of the work, the entire infrastructure is analyzed and measured with output protocols within the certification of the entire system together with outputs in the form of a measurement protocol.
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Slow DoS attacks generator
Krivulčík, Andrej ; Zeman, Václav (referee) ; Sikora, Marek (advisor)
The work is focused on Slow DoS attacks and generating them. There are compared 3 most popular web servers and their defensive modules against this type of attacks. Closed are described network model TCP/IP, protocol HTTP (Hypertext Transfer Protocol), each DoS attack, Slow GET, Slow POST or Slow Read and also flood attacks. Afterwards the attack generator is described, with its functionality.
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