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Like many routing protocols, the Tor anonymity network has decentralized path selection, in clients locally and independently choose paths. As a result, network resources may be left idle, leaving the system in a suboptimal state. This is…

Cryptography and Security · Computer Science 2016-06-14 John Geddes , Mike Schliep , Nicholas Hopper

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

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

Users of the Tor anonymity system suffer from lessthan- ideal performance, in part because circuit building and selection processes are not tuned for speed. In this paper, we examine both the process of selecting among pre-built circuits…

Cryptography and Security · Computer Science 2018-09-03 Mohsen Imani , Mehrdad Amirabadi , Matthew Wright

The Onion Router (Tor) relies on path selection algorithms to balance performance and anonymity by determining how traffic flows through its relay network. As Tor scales and usage patterns evolve, default strategies such as…

Networking and Internet Architecture · Computer Science 2025-08-26 Siddique Abubakr Muntaka , Jacques Bou Abdo

Tor is the most popular anonymous communication overlay network which hides clients' identities from servers by passing packets through multiple relays. To provide anonymity to both clients and servers, Tor onion services were introduced by…

Cryptography and Security · Computer Science 2023-07-06 Md Washik Al Azad , Hasniuj Zahan , Sifat Ut Taki , Spyridon Mastorakis

Tor is the most popular anonymous communication network. It has millions of daily users seeking privacy while browsing the internet. It has thousands of relays to route and anonymize the source and destinations of the users packets. To…

Networking and Internet Architecture · Computer Science 2022-12-01 Hussein Darir , Nikita Borisov , Geir Dullerud

There has been a growing interest in Internet user privacy, demonstrated by the popularity of privacy-preserving products such as Telegram and Brave, and the widespread adoption of HTTPS. The Domain Name System (DNS) is a key component of…

Networking and Internet Architecture · Computer Science 2025-07-29 Yunming Xiao , Peizhi Liu , Ruijie Yu , Chenkai Weng , Matteo Varvello , Aleksandar Kuzmanovic

Tor Onion Services are a way to host websites and other internet services anonymously. Onion Services are often used to bypass internet censorship and provide information services to users in oppressive regimes. This paper presents an…

Cryptography and Security · Computer Science 2023-12-04 Q Misell

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 popular low-latency anonymity network. However, Tor does not protect against the exploitation of an insecure application to reveal the IP address of, or trace, a TCP stream. In addition, because of the linkability of Tor streams…

Networking and Internet Architecture · Computer Science 2011-03-09 Stevens Le Blond , Pere Manils , Chaabane Abdelberi , Mohamed Ali Dali Kaafar , Claude Castelluccia , Arnaud Legout , Walid Dabbous

Anonymity networks are providing practical mechanisms to protect its users against censorship by hiding their identity and information content. The best-known anonymity network, The Onion Routing (Tor) network, is however subject to…

Cryptography and Security · Computer Science 2019-07-09 Anna Engelmann , Admela Jukan

In the Tor network, anonymity is achieved through a multi-layered architecture, which comes at the cost of a complex network. Scheduling data in this network is a challenging task and the current approach shows to be incapable of avoiding…

Networking and Internet Architecture · Computer Science 2020-04-23 Felix Fiedler , Christoph Döpmann , Florian Tschorsch , Sergio Lucia

To protect users' privacy, legislators have regulated the usage of tracking technologies, mandating the acquisition of users' consent before collecting data. Consequently, websites started showing more and more consent management modules --…

Cryptography and Security · Computer Science 2022-09-14 Nikhil Jha , Martino Trevisan , Luca Vassio , Marco Mellia

In an onion routing protocol, messages travel through several intermediaries before arriving at their destinations, they are wrapped in layers of encryption (hence they are called "onions"). The goal is to make it hard to establish who sent…

Cryptography and Security · Computer Science 2021-07-30 Megumi Ando , Anna Lysyanskaya , Eli Upfal

We describe a simple approach to peer-to-peer electronic mail that would allow users of ordinary workstations and mobile devices to exchange messages without relying upon third-party mail server operators. Crucially, the system allows…

Computers and Society · Computer Science 2020-07-15 Geoffrey Goodell

Tor and I2P are well-known anonymity networks used by many individuals to protect their online privacy and anonymity. Tor's centralized directory services facilitate the understanding of the Tor network, as well as the measurement and…

Networking and Internet Architecture · Computer Science 2018-09-27 Nguyen Phong Hoang , Panagiotis Kintis , Manos Antonakakis , Michalis Polychronakis

The number of users adopting Tor to protect their online privacy is increasing rapidly. With a limited number of volunteered relays in the network, the number of clients' connections sharing the same relays is increasing to the extent that…

Networking and Internet Architecture · Computer Science 2020-11-17 Lamiaa Basyoni , Aiman Erbad , Amr Mohamed , Ahmed Refaey , Mohsen Guizani

Advances in manufacturing technologies have enabled System-on-Chip (SoC) designers to integrate an increasing number of cores on a single SoC. Increasing SoC complexity coupled with tight time-to-market deadlines has led to increased…

Cryptography and Security · Computer Science 2023-02-14 Subodha Charles , Prabhat Mishra

Web searching is becoming an essential activity because it is often the most effective and convenient way of finding information. However, a Web search can be a threat to the privacy of the searcher because the queries may reveal sensitive…

Cryptography and Security · Computer Science 2016-04-12 Myungsun Kim