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Porting of Chrome Zero Functionality to JavaScript Restrictor
Horňák, Peter ; Večeřa, Vojtěch (referee) ; Polčák, Libor (advisor)
This thesis deals with improvements of security and privacy protection of web browser users by enhancing functionality of web browser extension called JavaScript Restrictor, which prototype was created in order to protect users on web. Within this thesis are analyzed security measures realized by tool Chrome Zero, which implements measures against microarchitectural attacks, attacks abusing high resolution timers and abuse of JavaScript engine. Thesis evaulates topicality of measures and integrates selected into JavaScript Restrictor. Measures are tested and evaluated from every day use point of view.
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Employing Network Intelligence for Deanonymization of Cryptocurrency Users
Horňák, Peter ; VUT), Marcel Marek (FIT (referee) ; Grégr, Matěj (referee) ; Jeřábek, Vladimír (referee) ; Veselý, Vladimír (advisor)
Cieľom tejto práce je analyzovať peer-to-peer sieť Ethereum a uzly pripojené k sieti. Pre zber potrebných údajov navrhujeme monitorovací systém, ktorý dokáže prehľadávať sieť objavovaním nových peerov a pravidelne o nich zbierať informácie. Implementujeme verziu 4 a verziu 5 Ethereum discovery protokolu, ktorý slúži na komunikáciu s nájdenými uzlami siete. Platforma je postavená na architektúre mikroslužieb pre lepšiu škálovateľnosť a modularitu, pričom je zapuzdrená v Docker kontajneroch pre jednoduchšie nasadenie. Monitorovací systém zhromažďuje a ukladá základné informácie, ako sú adresy IP, čísla portov a asymetrické verejné kľúče, do databázy časových radov. Na overenie výsledkov sa potom výsledky porovnávajú s verejne dostupnými zdrojmi.
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Porting of Chrome Zero Functionality to JavaScript Restrictor
Horňák, Peter ; Večeřa, Vojtěch (referee) ; Polčák, Libor (advisor)
This thesis deals with improvements of security and privacy protection of web browser users by enhancing functionality of web browser extension called JavaScript Restrictor, which prototype was created in order to protect users on web. Within this thesis are analyzed security measures realized by tool Chrome Zero, which implements measures against microarchitectural attacks, attacks abusing high resolution timers and abuse of JavaScript engine. Thesis evaulates topicality of measures and integrates selected into JavaScript Restrictor. Measures are tested and evaluated from every day use point of view.
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