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Detection and mitigation of cyber attacks at local area networks
Racka, Jan ; Lieskovan, Tomáš (referee) ; Gerlich, Tomáš (advisor)
The bachelor thesis is focused on the detection and mitigation of flood attacks in local area networks. The thesis can be divided into two parts. In the theoretical part, first flooding attacks are described. Then, the problem of attack detection is discussed in depth, including the implemented detection methods. Subsequently, the classification of detection tools by location is discussed and examples of detection tools are given. The last theoretical section is devoted to network mapping methods and topology detection tools. In the practical part, the design of the IDS and the test network is discussed. The network consists of three end devices namely: the IDS, the victim and the attacker. A Mikrotik router is used to ensure connectivity between all the devices. The IDS has been implemented in Python and is composed of individual modules that extend its functionality. The most important module is the detection module, which contains detection methods against SYN Flood, UDP Flood, ICMP Flood attacks and one universal comprehensive method against all flood attacks. The ARP Scan module allowed the IDS to map the network and use ARP queries to detect the presence of endpoint devices in the network. The learning module made it easier to set up rules for each detection method by monitoring network traffic over a period of time. It then determines appropriate rule values from the detected data. The SSH module provided IDS with the ability to proactively respond to attacks and disconnect the attacker from the rest of the network. ARP Scans also use the SSH module to discover information about guests. The IDS has been tested in both virtual and real environments. The results show that the developed detection methods work and the IDS can stop the attack in a reasonable time. ARP Scanning was also tested and was able to detect new guests on average in the first pass. The effect of IDS on communication was also monitored and found to be minimal.
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Detection of DoS and DDoS attacks targeting a web server
Nguyen, Minh Hien ; Fujdiak, Radek (referee) ; Kuchař, Karel (advisor)
The bachelor thesis deals with the detection of DoS (Denial of service) and DDoS (Distributed Denial of Service) attacks targeting a web server. This work aims to design detection methods, which will be subsequently tested. Analysis of attacks according to the ISO/OSI (International Organization for Standardization/Open Systems Interconnection) reference model will allow an understanding of the features of individual attacks. In the practical part, some tools are used to implement attacks, then there are generators of legitimate network traffic and a secure web server. Substantial data are created from ongoing attacks and communications of ordinary users. These data are an important part of the proposed methods. The purpose of assessing the achieved results is to evaluate the effectiveness of individual detection methods in terms of accuracy and time consumption.
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Soil carbon sequestration: ways and potential
Valentová, Mariana ; Vindušková, Olga (advisor) ; Bartuška, Martin (referee)
By choosing appropriate practices, carbon can be stored in the soil as a means of mitigating (mitigating) climate change. The paper clearly summarize our current understanding of the principles (e.g., soil organic matter, level of C saturation) anf factors (e.g., parent rocks, climate, human) influencing the potential of soils to sequester carbon and its importance in terms of implemeting effective mitigation measures. This is followed by an introduction of method for estimating the carbon sequestration capacity of soils and its relevance to sequestration potential is discussed. The main focus of the paper is the comparison of the land use changes (e.g., forest or peatlands restoration) and land management (e.g., use of crops rotation, no-till agriculture) that can achieve soil carbon sequestration, including the quantitative estimates of their sequestration potential. Finally, there is summary of the estimates of global sequestration potential of soils. Key words: carbon, soil, sequestration, mitigation, climate change, land-use, soil capacity
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Mapping Cyber Security Measures: From Legislation to Technical Implementation
Hopp, Jiří ; MSc, Mezera Michal, (referee) ; Sedlák, Petr (advisor)
In my thesis, I focused on creating a systematic tool for mapping technical measures and mitigations to national legislative cybersecurity requirements. I conducted an analysis of the addressed issue, which revealed opportunities for developing the tool and revealed forthcoming changes in legislative requirements based on the EU directive NIS2. In the following part of the thesis, I described the design and development of the mentioned tool in the form of a table. The tool met the client's requirements and mapped relevant technical measures to individual points of the current and NIS2-derived legislative requirements. Based on consultations with the client, I determined that the objectives outlined in the thesis were successfully met and that the developed tool will be utilized in a real-world environment.
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Fenomén urban gardening
Kozáková, Petra
The diploma thesis aims to introduce the phenomenon of urban gardening and identify the benefits provided by the urban environment and society. The benefits of urban horticulture are identified as a possible adaptation measure concerning ongoing climate change. The types of urban gardening, approaches and possibilities of its application in practice are presented. Trends in urban horticulture and individual aspects are described on the example in the Czech Republic, the Netherlands and Sweden. The specific benefits of urban gardening were expressed on a specific example of a community garden in Brno using CBA analysis (cost-benefit analysis). The author worked here with data provided to her directly from the staff of the selected community garden and also based on the "willingness to pay" method, in which she addressed 100 respondents. The result of the CBA analysis was an evaluation of the community garden project, which determined the return on investment and its net present value.
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Game Over: Death in video games and impact of videogame Brothers: Tale of Two Sons on gamers
Khan, Jakub ; Švelch, Jaroslav (advisor) ; Švelch, Jan (referee)
Videogames are no longer just an entertainment product for certain interest groups, they are a global mass medium for all generations that can be used for purposes other than entertainment. The subject of this thesis is videogames and their influence on gamers. The aim is then to find out how male and female gamers perceive death in videogames, what emotions and reactions this contact evokes in them, and whether videogames can change their perception of death. The research was conducted through a qualitative study, conducted through semi- structured interviews with male and female gamers who first played the videogame Brothers: A Tale of Two Sons, which contained a narrative type of death. From the conducted research it was found that the videogame was able to evoke strong emotions in the male and female players, especially negative ones such as sadness, fear, or regret, caused by contact with the unexpected death of the main character they had been playing all along. The evocation of these emotions was enhanced by the simple controls and simple puzzles, allowing for a greater focus on the story, as well as the interactivity of the videogame and belonging to the protagonist. Only one participant out of six in the research succeeded in changing the perception of death in a positive direction, but...
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Comparing Climate Change Adaptation Measures: The Cases of the Czech Republic, Germany and Poland
Skupa, Marek ; Ditrych, Ondřej (advisor) ; Kučerová, Irah (referee)
The diploma thesis "Comparing Climate Change Adaptation Measures: The Cases of the Czech Republic, Germany and Poland" compares national adaptation strategies on climate change of the Czech Republic, Germany and Poland. These strategies represents general politics of selected states on the field of climate change adaptation and the author compares them regarding the adaptation measures they contain. For this comparison, framework based on options and recommendations provided by Intergovernmental Panel on Climate Change (IPCC) and the EU is used. Author also analyses mitigation policies of selected states and examines similarities and differences in both approaches. In conclusion author relates his findings towards existing research and using both, he introduces limited theoretical findings about possible relationship between mitigation and adaptation policies of states.
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Detection and mitigation of cyber attacks at local area networks
Racka, Jan ; Lieskovan, Tomáš (referee) ; Gerlich, Tomáš (advisor)
The bachelor thesis is focused on the detection and mitigation of flood attacks in local area networks. The thesis can be divided into two parts. In the theoretical part, first flooding attacks are described. Then, the problem of attack detection is discussed in depth, including the implemented detection methods. Subsequently, the classification of detection tools by location is discussed and examples of detection tools are given. The last theoretical section is devoted to network mapping methods and topology detection tools. In the practical part, the design of the IDS and the test network is discussed. The network consists of three end devices namely: the IDS, the victim and the attacker. A Mikrotik router is used to ensure connectivity between all the devices. The IDS has been implemented in Python and is composed of individual modules that extend its functionality. The most important module is the detection module, which contains detection methods against SYN Flood, UDP Flood, ICMP Flood attacks and one universal comprehensive method against all flood attacks. The ARP Scan module allowed the IDS to map the network and use ARP queries to detect the presence of endpoint devices in the network. The learning module made it easier to set up rules for each detection method by monitoring network traffic over a period of time. It then determines appropriate rule values from the detected data. The SSH module provided IDS with the ability to proactively respond to attacks and disconnect the attacker from the rest of the network. ARP Scans also use the SSH module to discover information about guests. The IDS has been tested in both virtual and real environments. The results show that the developed detection methods work and the IDS can stop the attack in a reasonable time. ARP Scanning was also tested and was able to detect new guests on average in the first pass. The effect of IDS on communication was also monitored and found to be minimal.
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Detection of DoS and DDoS attacks targeting a web server
Nguyen, Minh Hien ; Fujdiak, Radek (referee) ; Kuchař, Karel (advisor)
The bachelor thesis deals with the detection of DoS (Denial of service) and DDoS (Distributed Denial of Service) attacks targeting a web server. This work aims to design detection methods, which will be subsequently tested. Analysis of attacks according to the ISO/OSI (International Organization for Standardization/Open Systems Interconnection) reference model will allow an understanding of the features of individual attacks. In the practical part, some tools are used to implement attacks, then there are generators of legitimate network traffic and a secure web server. Substantial data are created from ongoing attacks and communications of ordinary users. These data are an important part of the proposed methods. The purpose of assessing the achieved results is to evaluate the effectiveness of individual detection methods in terms of accuracy and time consumption.
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Comparing Climate Change Adaptation Measures: The Cases of the Czech Republic, Germany and Poland
Skupa, Marek ; Ditrych, Ondřej (advisor) ; Kučerová, Irah (referee)
The diploma thesis "Comparing Climate Change Adaptation Measures: The Cases of the Czech Republic, Germany and Poland" compares national adaptation strategies on climate change of the Czech Republic, Germany and Poland. These strategies represents general politics of selected states on the field of climate change adaptation and the author compares them regarding the adaptation measures they contain. For this comparison, framework based on options and recommendations provided by Intergovernmental Panel on Climate Change (IPCC) and the EU is used. Author also analyses mitigation policies of selected states and examines similarities and differences in both approaches. In conclusion author relates his findings towards existing research and using both, he introduces limited theoretical findings about possible relationship between mitigation and adaptation policies of states.
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