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The analysis of TOR’s hidden service
Mesík, Vladimír ; Burda, Karel (referee) ; Rosenberg, Martin (advisor)
This work deals with problems concerning anonymity in the internet age, the principle of onion routing, Tor network, Tor’s Hidden Service protocol. Analyzing security, anonymity and the possibility of Hidden Services deanonymisation, revealing the actual IP address of hidden service server. It describes selected types of attacks against Tor network in order to deanonymisation of nodes and hidden services. The practical part describes the process of installing and configuring hidden services under Linux. The final part of the practical part is operational and running .onion hidden service with anonymous service for file storing and sharing. Part of the work is the development of two laboratory tasks aimed at the server configuration and its security.
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Anonymous communication in Internet environment
Pajtinová, Mária ; Malina, Lukáš (referee) ; Hajný, Jan (advisor)
Master´s thesis focuses on certain possibilities of how user can anonymously commununicate through the Internet. There are described following anonymous programs: TOR, JAP, I2P and CyberGhost, which allow user to hide his own identity to other IP address. Subsequently, measurements from different technologies are made by anonymous program TOR for calculate transmission speed.
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Decentralized communication tool with anonymity guarantee
Legéň, Michal ; Burget, Radim (referee) ; Malý, Jan (advisor)
Anonymity on the internet is becoming a actuall issue nowadays. There are several tools, that can be used to monitor user's activity and it can lead to lose privacy of users. The aim of this master's thesis is to describe different ways of working anonymous systems, especially the method called Onion Routing. The introduction of this work is devoted to the description of this method together with asymmetric cryptosystem RSA. The second part belongs to basics of socket programming and to the implementation of anonymous system in programming language C++. The final part is focussed on analysis of system in terms of security and time complexity. The conditions of anonymity and decentralization are accomplished. There is no presence of central server in the system and the management is handled by signalling messages.
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