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ICT tester
Tatar, Martin ; Člupek, Vlastimil (referee) ; Zeman, Václav (advisor)
The diploma thesis deals with the extension of the ICT Tester plugin module which allows the user to digitally sign the generated outputs and with the testing of selected DoS attacks that are implemented in it. In the theoretical part of the thesis, selected types of DoS attacks are analyzed, it is described how they work, how to defend against them, examples of significant attacks that actually took place are included and Apache JMeter is described. In the practical part selected attacks are created and tested. Then the new funcionality for digital signature is implemented.
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Log analysis of active network elements
Kajánková, Petra ; Zeman, Václav (referee) ; Slavíček, Karel (advisor)
The master thesis focuses on the issue of searching for malicious activity originating from authorized users who have permission to modify devices. The theoretical part first introduces the basic network model ISO/OSI, together with TCP/IP. It then focuses on the two most well-known logging protocols, the Syslog protocol and SNMP. The practical part of the work consists of the theoretical design and subsequent implementation of the program that is able to evaluate records of events occuring on individual network devices.
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High Availability firewalls
Frátrik, Tibor ; Zeman, Václav (referee) ; Slavíček, Karel (advisor)
This diploma thesis is dedicated to researching the possibility redundancy of firewalls, especially commercial, software or hardware firewalls. The theoretical part describes individual firewalls and their redundancy options. The diploma thesis was more focused on two specific firewalls: ASA and Pfsense. As part of the practical part, topologies were designed and implemented for testing the redundancy of these firewalls. Dynamic address translations (NAT), VPN connection status, either site-to-site or remote-access VPN connections, and TCP connections were selected for testing. Finally, the results for individual firewalls were compared. Where it was mainly researched and compared, how the computer network reacts to redundancy in individual types of firewalls.
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Block cipher mode of operation
Kunert, Alois ; Sikora, Marek (referee) ; Zeman, Václav (advisor)
This Bachelor thesis deals with Operation modes of symmetric ciphers. This thesis deals with both basic operation modes and with newer operation modes that offer additional functions. A conceptual design was made in semestral thesis, which was realised in this thesis. Finally an analysis of the basic operation modes, implemented in the web application ,was made to make a comparison between the measurments taken in the semestral thesis.
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Stress tester
Lanžhotský, Karel ; Člupek, Vlastimil (referee) ; Zeman, Václav (advisor)
This bachelor thesis deals with the matter of stress testing using open-source tool Apache JMeter and it’s extensions. Main output is the extension of the module which allows to produce DoS (denial of service) attacks. At the beginning of the thesis, there are characteristics for this type of attack, what types of DoS exist with some examples. After that, there’s testing, verification of functionality and finding of errors in extension modules. At the end thesis is dedicated to adding features to DDoS module and testing of capabilities of the attacks on created scenarios.
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Digital identity
Dvořák, Roman ; Burda, Karel (referee) ; Zeman, Václav (advisor)
This bachelor‘s thesis deals with the personal digital identity area. Its goal is to describe accompanying technologies which ensure the course of this field. In addition, another goal is to describe the state of things in related sectors. At first, attention is focused to basic concepts and terms describing this topic. The following section describes technologies which are used in area of digital and bank identity. In the next chapter, the emphasis is on explaining terms linked with digital identity and the structure of public eGovernment, followed by the description of e-identity. In this chapter, the identification means, provided by the government or commercial sector, are more explained. The same applies to the identification means provided by the government, but which are not considered as e-identity. Another chapter is dedicated to European Digital Identity and its current state, followed by mentioning states which have used digital identity before it was made mandatory by the regulation from European Commission. The following chapter explores security threats, their enumeration and classification according to different criteria. It mentions types of cyberattacks, threats associated with using digital identity and elimination of the threats. The point of view is taken from user’s experience, but from providers as well. The last chapter describes the practical part which is an educational web application that summarizes the output of this bachelor’s thesis.
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Comparison of cryptography performance of microcontrollers ARM Cortex-A
Škurla, Tomáš ; Zeman, Václav (referee) ; Slavíček, Karel (advisor)
The bachelor thesis deals with the measurement of cryptographic performance of ARM Cortex-A series microcontrollers. The theoretical part focuses on the description of concepts of cryptography, while at the same time explaining the principles of operation of individual cryptographic systems. Afterwards, thesis also describes the inner workings of ARM processors, their historical development, support for cryptography and detection of said support within processors. This is followed by defining the metrics for testing, part of which includes enumerating the hardware used in the testing process, with the focus being on the cryptography acceleration and encryption support. This also includes a description of the planned environment and software used in the testing. The practical part includes a description of the actual preparation of the defined environment and its possible modifications within the individual testing needs. The thesis concludes with an evaluation of the processed data and subsequent drawing of conclusions
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