Tor Attack Studies: A Survey on Active and Passive Subject

Mohamad Amar Irsyad Mohd Aminuddin, Zarul Fitri Zaaba, Azman Samsudin, Nor Badrul Anuar Juma'at

Abstract

Privacy is one of the important aspects that the Internet user would like to protect. The introduction of Tor as a tool for anonymous Internet access has attracted the attention of researchers worldwide. Various researchers had proposed an attack technique in order to challenge the anonymity properties provided by Tor to the Internet user. Due to a lack of adequate comprehension of the attacked subject utilized in the various Tor attack studies, this paper aims to classify and analyze the attacked subject on those studies. Our research goal is to review and analyze the attack subject practice and trends in the Tor research field. The knowledge obtained from this study will allow for better comprehension of the nature of the attacks executed on Tor and will be useful for researchers' guidance, especially in the context of practice and trends in attack subjects on Tor. Therefore, this study classified the attacked subject on Tor based upon 80 reviewed studies related to attacking the Tor. This classification had yielded several new substantial pieces of knowledge on the subject utilized in the Tor attack. It is revealed that most of the researchers had focused on monitoring the network traffic between the user and Entry OR, followed by malicious Exit OR and malicious Entry OR. In addition, various studies have been found to utilize more than one attack subject in attacking the Tor network.

Keywords: anonymity, attack, privacy, security, Tor.


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