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Tor is an anonymity network that allows offering and accessing various kinds of resources, known as hidden services, while guaranteeing sender and receiver anonymity. The Tor web is the set of web resources that exist on the Tor network,…

Social and Information Networks · Computer Science 2023-02-16 Massimo Bernaschi , Alessandro Celestini , Marco Cianfriglia , Stefano Guarino , Flavio Lombardi , Enrico Mastrostefano

Anonymity services have seen high growth rates with increased usage in the past few years. Among various services, Tor is one of the most popular peer-to-peer anonymizing service. In this survey paper, we summarize, analyze, classify and…

Networking and Internet Architecture · Computer Science 2018-03-08 Saad Saleh , Junaid Qadir , Muhammad U. Ilyas

The Onion Router (Tor) is a controversial network whose utility is constantly under scrutiny. On the one hand, it allows for anonymous interaction and cooperation of users seeking untraceable navigation on the Internet. This freedom also…

Cryptography and Security · Computer Science 2025-04-24 Alfonso Rodriguez Barredo-Valenzuela , Sergio Pastrana Portillo , Guillermo Suarez-Tangil

Tor is among most well-known dark net in the world. It has noble uses, including as a platform for free speech and information dissemination under the guise of true anonymity, but may be culturally better known as a conduit for criminal…

Social and Information Networks · Computer Science 2019-02-19 Mahdieh Zabihimayvan , Reza Sadeghi , Derek Doran , Mehdi Allahyari

Anonymity networks are becoming increasingly popular in today's online world as more users attempt to safeguard their online privacy. Tor is currently the most popular anonymity network in use and provides anonymity to both users and…

Cryptography and Security · Computer Science 2022-01-27 Ishan Karunanayake , Nadeem Ahmed , Robert Malaney , Rafiqul Islam , Sanjay Jha

Ever since the introduction of the internet, it has been void of any privacy. The majority of internet traffic currently is and always has been unencrypted. A number of anonymous communication overlay networks exist whose aim it is to…

Computers and Society · Computer Science 2014-04-21 Rolf Jagerman , Wendo Sabée , Laurens Versluis , Martijn de Vos , Johan Pouwelse

The Tor Network has been a significant part of the Internet for years. Tor was originally started in the Naval Research Laboratory for anonymous Internet browsing and Internet-based communication. From being used for anonymous…

Cryptography and Security · Computer Science 2024-09-10 Chaitanya Rahalkar , Anushka Virgaonkar , Kethaki Varadan

Tor is one of the most well-known networks that protects the identity of both content providers and their clients against any tracking or tracing on the Internet. So far, most research attention has been focused on investigating the…

Social and Information Networks · Computer Science 2019-11-19 Mahdieh Zabihimayvan , Derek Doran

Tor is an anonymity network used by millions of people every day to evade censorship and protect their browsing activity from privacy threats such as mass surveillance. Unfortunately, Tor has been shown to be vulnerable to website…

Cryptography and Security · Computer Science 2023-10-18 Ethan Witwer

Current anonymizing networks have become an important tool for guaranteeing users' privacy. However, these platforms can be used to perform illegitimate actions, which sometimes makes service providers see traffic coming from these networks…

Cryptography and Security · Computer Science 2014-12-16 Jesus Diaz , David Arroyo , Francisco B. Rodriguez

Over the last two decades, the scale and complexity of Anonymous networks and its associated technologies grows exponentially as privacy has become a major concern of individuals. Also, some cyber attackers make use of privacy…

Cryptography and Security · Computer Science 2018-12-18 Tian Yunfan , Zhang Xiang

There are not many known ways to break Tor anonymity, and they require an enormous amount of computational power. Controlling both entrance and exit nodes allows an attacker to compromise client IP with enough pattern analysis. If an .onion…

Cryptography and Security · Computer Science 2017-12-13 Stephanie Abraham , Tyler Silva , Robert Decourcy , Jim Cardon

Tor is a communications infrastructure widely used for unfettered and anonymous access to Internet websites. Tor is also used to access sites on the .onion virtual domain. The focus of .onion use and discussion has traditionally been on the…

Cryptography and Security · Computer Science 2015-06-15 Paul Syverson , Griffin Boyce

On August 2, 2021 a group of concerned scientists and US funding agency and federal government officials met for an informal discussion to explore the value and need for a well-coordinated US Open Research Commons (ORC); an interoperable…

Being a volunteer-run, distributed anonymity network, Tor is vulnerable to Sybil attacks. Little is known about real-world Sybils in the Tor network, and we lack practical tools and methods to expose Sybil attacks. In this work, we develop…

Cryptography and Security · Computer Science 2016-02-26 Philipp Winter , Roya Ensafi , Karsten Loesing , Nick Feamster

Tor is currently one of the more popular systems for anonymizing near real-time communications on the Internet. Recently, Borisov et al. proposed a denial of service based attack on Tor (and related systems) that significantly increases the…

Cryptography and Security · Computer Science 2013-10-04 Norman Danner , Sam DeFabbia-Kane , Danny Krizanc , Marc Liberatore

Tor hidden services allow running Internet services while protecting the location of the servers. Their main purpose is to enable freedom of speech even in situations in which powerful adversaries try to suppress it. However, providing…

Cryptography and Security · Computer Science 2014-11-18 Alex Biryukov , Ivan Pustogarov , Fabrice Thill , Ralf-Philipp Weinmann

The Internet comprises tens of thousands of autonomous systems (ASes) whose commercial relationships are not publicly announced. The classification of the Type of Relationship (ToR) between ASes has been extensively studied over the past…

Networking and Internet Architecture · Computer Science 2025-04-15 Amit Zulan , Omer Miron , Tal Shapira , Yuval Shavitt

Anonymity networks hide user identities with the help of relayed anonymity routers. However, the state-of-the-art anonymity networks do not provide an effective trust model. As a result, users cannot circumvent malicious or vulnerable…

Cryptography and Security · Computer Science 2013-01-22 Peng Zhou , Xiapu Luo , Ang Chen , Rocky K. C. Chang

Tor is currently the most popular network for anonymous Internet access. It critically relies on volunteer nodes called bridges for relaying Internet traffic when a user's ISP blocks connections to Tor. Unfortunately, current methods for…

Cryptography and Security · Computer Science 2016-08-02 Mahdi Zamani , Jared Saia , Jedidiah Crandall
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