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Access Controll for USB Bus
Krajči, Martin ; Malinka, Kamil (oponent) ; Očenáš, Martin (vedoucí práce)
This bachelor thesis addresses the matter of controlling USB devices in operating system Linux. The main objective consists of making an application, which analyzes USB devices based on their attributes and decides, whether they should be allowed or blocked, while it is necessary to finish the inspection before a device is given a chance to perform potentially harmful activities. The thesis also discuses the need of blocking certain devices in terms of security. The final application was implemented as two independent modules. The first module represents an interface for defining specific rules to be used in order to determine the harmlessness of the device. Second module uses created rules to control USB devices discovered by kernel messages designed for subsystem UDEV. Based on the result of the control, the application decides whether the device should be authorized or unauthorized and informs the user about the performed action via terminal.
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Fingerprinting Attacks on Anonymity Systems
Krajči, Martin ; Holop, Patrik (oponent) ; Malinka, Kamil (vedoucí práce)
This thesis deals with fingerprinting attacks in anonymization systems, mostly in the Tor network. Such an attack was designed and executed in a real-world environment, with an aim to show the impact of errors from previous studies. Three closed-world datasets and one open-world dataset were gathered and then used for training and testing of N-shot learning classifier. The first dataset was gathered by browsing websites with a web browser in the default configuration, the second dataset was gathered in the same configuration as in the first case, but from a different country, and the third dataset was gathered by browsing websites with a web browser with Adblock Plus plugin turned on and Spanish locale set. When both training and testing the classifier on the first dataset, the average accuracy of classification was 92%. However, when training the classifier on the first dataset and testing on the second and third dataset, the average accuracy of classification was 38,58% and 39,65% respectively.
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Access Controll for USB Bus
Krajči, Martin ; Malinka, Kamil (oponent) ; Očenáš, Martin (vedoucí práce)
This bachelor thesis addresses the matter of controlling USB devices in operating system Linux. The main objective consists of making an application, which analyzes USB devices based on their attributes and decides, whether they should be allowed or blocked, while it is necessary to finish the inspection before a device is given a chance to perform potentially harmful activities. The thesis also discuses the need of blocking certain devices in terms of security. The final application was implemented as two independent modules. The first module represents an interface for defining specific rules to be used in order to determine the harmlessness of the device. Second module uses created rules to control USB devices discovered by kernel messages designed for subsystem UDEV. Based on the result of the control, the application decides whether the device should be authorized or unauthorized and informs the user about the performed action via terminal.
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