Tor is a widely-used anonymity network with more than two million daily users. A prominent feature of Tor is the hidden service architecture. Hidden services are a popular method for communicating anonymously or sharing web contents anonymously. For security reasons, in Tor all data packets to be send over the network are structured completely identical. They are encrypted using the TLS protocol and its size is fixed to exactly 512 bytes. In this work we describe a method to deanonymize any hidden service on Tor based on traffic analysis. This method allows an attacker with modest resources to deanonymize any hidden services in less than 12.5 days. This poses a threat to anonymity online.
ZusammenfassungZiel der vorliegenden Arbeit ist die Erstellung einer Anonymitätsmatrix. Der Fokus liegt hierbei insbesondere in der Verbindung der technischen und psychologischen Komponenten der Betrachtung. Ausgangssituation ist die Verwendung einer Privacy Enhancing Technology, konkret dem Tor-Browser. So ist das Ziel, die Tor-Nutzergruppe in Bezug auf ihre Online-Privatheitskompetenz, Nutzungsweise und Grad der Anonymität zu erforschen. Hierzu wurde eine Online-Befragung ($$N = 120$$
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