Ing. Jan Fesl, Ph.D.

Ing. Jan Fesl, Ph.D.

Ing. Josef Kokeš, Ph.D.

Department of Computer Systems

This bachelor thesis deals with the design and implementation of detection methods related to unwanted monitoring of users by mobile phones on the Android platform. Monitoring network traffic and usage of system resources gave me data subjected to analysis. I implemented the application designated for data mining beyond requirements. I could not detect eavesdropping of users nor activity allied with improving users' localization by Wi-Fi scanning. There was an unexpected behavior related to the Google Maps application. The communication with its domains occurred even though the application was terminated.

Thesis on DSpace

Ing. Jan Fesl, Ph.D.

Ing. Alexandru Moucha, Ph.D.

Department of Computer Systems

The main purpose of this study is to test the implementation of WPA3, the new security standard for wireless networks on MikroTik devices. It furthermore compares the effectivity of WPA3 with WPA2 standard which is more used nowadays. The thesis outlines the evolution of wireless security standards from WEP to WPA3. It contains a detailed description of the principles used by WPA3. The already known Denial of Service (DoS) attacks - Doppelganger, Muted Peer, PMK Gobbler and Memory Omnivore are discussed and examined thoroughly in this study, explaining their principles and impacts in great details. Additionaly it compares these attacks with the ones used on the current implementations of WPA3 for MikroTik devices. A new attack which uses the vulnerability in the fundamentals of the WPA3 standard is also described in the study. Both WPA2 and WPA3 standards are comparable, in terms of efficiency. However, it is shown that the tested implementations are not secure enough to be used in real-life environment. Furthemore the thesis proves that the SAE handshake as it is now, is not suitable for the use in shared networks. As a part of the study, each of attack scripts was updated and refactored to current standards. Along that a complex program allowing automatized testing of each attack on different versions of WPA3 implementations was created.

Thesis on DSpace

Ing. Jan Fesl, Ph.D.

Ing. Jiří Smítka

Department of Information Security

This thesis is focused on the field of Slow Distributed Denial of Service attacks and their mit- igation. First, I explain how the most common types of SDDoS attacks function and what is their impact on current systems. Second section of the thesis is then focused on different possible defense solutions, how they could be implemented and if they are effective. In the final sections I choose a solution approach which I design, implement and test successfully.

Thesis on DSpace

Ing. Jan Fesl, Ph.D.

Ing. Jiří Buček, Ph.D.

Department of Computer Systems

This work focuses on the security of RFID and NFC tags and cards in infrastructure. The aim of the work is to design and implement a portable and extensible open-source device that will be able to clone and emulate some selected types of RFID cards and tags using a selected commercially available microcomputer. The work also involves the development of software with a graphical environment that enables the necessary capabilities of the device. The theoretical part of the thesis explains the basic principles of RFID technology, its security and shortcomings. Furthermore, an analysis of existing solutions that are used for cloning and emulation of RFID technology and the selection of suitable hardware for the creation of the resulting device are discussed. The practical part of the thesis deals with the design and actual implementation of the device from both hardware and software aspects. Finally, the functionality of the device is verified by testing a set of different RFID cards and tags.

Thesis on DSpace

Ing. Jan Fesl, Ph.D.

prof. Ing. Pavel Tvrdík, CSc.

Department of Computer Systems

This thesis is dedicated to the problem of the virtual machines consolidation with a focus on optimizing the load of the network infrastructure. I define this problem and present several possible solutions. Finally those methods are experimentally tested on the randomly generated data for the purpose of evaluation.

Thesis on DSpace