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Threat management for CERT/CSIRT teams
Machálek, Jiří ; Peterka, Jiří (advisor) ; Lukeš, Dan (referee)
The increasing importance of the Internet as an integral part of contemporary society has stressed the need to formalize the process of response to security incidents that accompany it inseparably. Security teams of the CERT/CSIRT type are established at different levels for this purpose. These teams respond to reports from their constituency and cooperate with other teams. This thesis introduces the reader to the issues these teams deal with and analyzes their needs in resolving threats and problems related to DNS and its domains. Part of the work is an overview of the basic existing tools to support the work of CERT/CSIRT teams to solve problems with domains, the design of a tool Malicious Domain Manager and description of its implementation. The results of test run of this tool by CZ.NIC-CSIRT team show its contribution to security of DNS.
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Activity of V1 neurons after presentation of novel class of stimuli: comparision with experimental data
Machálek, Jiří ; Brom, Cyril (advisor) ; Lukavský, Jiří (referee)
Neurons in visual cortex areas V1 and V2 are selective to the shape of stimulus. Almost all present theories and models assume that variability to the shape of stimuli to which the neurons are selective is very low - preferred shapes are typically only bars and edges. However recent study (Hegdé and Van Essen) showed that is not true { single neurons prefer wide range of shapes. This work replicates the study in current computational models of cortical areas V1 and V2 (for example LISSOM) and compares results with experimental data. It shows that examined models develope neurons preferring these complex shapes rarely or just for a part of stimuli set.
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Threat management for CERT/CSIRT teams
Machálek, Jiří ; Peterka, Jiří (advisor) ; Lukeš, Dan (referee)
The increasing importance of the Internet as an integral part of contemporary society has stressed the need to formalize the process of response to security incidents that accompany it inseparably. Security teams of the CERT/CSIRT type are established at different levels for this purpose. These teams respond to reports from their constituency and cooperate with other teams. This thesis introduces the reader to the issues these teams deal with and analyzes their needs in resolving threats and problems related to DNS and its domains. Part of the work is an overview of the basic existing tools to support the work of CERT/CSIRT teams to solve problems with domains, the design of a tool Malicious Domain Manager and description of its implementation. The results of test run of this tool by CZ.NIC-CSIRT team show its contribution to security of DNS.
|
|
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Activity of V1 neurons after presentation of novel class of stimuli: comparision with experimental data
Machálek, Jiří ; Lukavský, Jiří (referee) ; Brom, Cyril (advisor)
Neurons in visual cortex areas V1 and V2 are selective to the shape of stimulus. Almost all present theories and models assume that variability to the shape of stimuli to which the neurons are selective is very low - preferred shapes are typically only bars and edges. However recent study (Hegdé and Van Essen) showed that is not true { single neurons prefer wide range of shapes. This work replicates the study in current computational models of cortical areas V1 and V2 (for example LISSOM) and compares results with experimental data. It shows that examined models develope neurons preferring these complex shapes rarely or just for a part of stimuli set.
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