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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

Network-on-Chip (NoC) is widely used to facilitate communication between components in sophisticated System-on-Chip (SoC) designs. Security of the on-chip communication is crucial because exploiting any vulnerability in shared NoC would be…

Cryptography and Security · Computer Science 2025-05-07 Hansika Weerasena , Prabhat Mishra

Tor provides anonymity online by routing traffic through encrypted tunnels, called circuits, over paths of anonymizing relays. To enable users to connect to their selected destination servers without waiting for the circuit to be build, the…

Cryptography and Security · Computer Science 2017-06-21 Mohsen Imani , Mehrdad Amirabadi , Matthew Wright

In the last decade, Tor proved to be a very successful and widely popular system to protect users' anonymity. However, Tor remains a practical system with a variety of limitations, some of which were indeed exploited in the recent past. In…

Cryptography and Security · Computer Science 2016-10-20 Amirali Sanatinia , Guevara Noubir

As more and more data is transmitted in the configurable optical layer, whereby all optical switches forward packets without electronic layers involved, we envision privacy as the intrinsic property of future optical networks. In this…

Cryptography and Security · Computer Science 2016-04-19 Anna Engelmann , Admela Jukan

Onion services are anonymous network services that are exposed over the Tor network. In contrast to conventional Internet services, onion services are private, generally not indexed by search engines, and use self-certifying domain names…

Cryptography and Security · Computer Science 2018-07-02 Philipp Winter , Anne Edmundson , Laura M. Roberts , Agnieszka Dutkowska-Zuk , Marshini Chetty , Nick Feamster

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

Obtaining and maintaining anonymity on the Internet is challenging. The state of the art in deployed tools, such as Tor, uses onion routing (OR) to relay encrypted connections on a detour passing through randomly chosen relays scattered…

Cryptography and Security · Computer Science 2015-01-06 Joan Feigenbaum , Bryan Ford

Darknet technology such as Tor has been used by various threat actors for organising illegal activities and data exfiltration. As such, there is a case for organisations to block such traffic, or to try and identify when it is used and for…

Cryptography and Security · Computer Science 2018-08-06 Hamish Haughey , Gregory Epiphaniou , Haider Al-Khateeb , Ali Dehghantanha

Internet censors seek ways to identify and block internet access to information they deem objectionable. Increasingly, censors deploy advanced networking tools such as deep-packet inspection (DPI) to identify such connections. In response,…

Networking and Internet Architecture · Computer Science 2016-11-15 Lucas Dixon , Thomas Ristenpart , Thomas Shrimpton

Tor is the most widely used anonymity network, currently serving millions of users each day. However, there is no access control in place for all these users, leaving the network vulnerable to botnet abuse and attacks. For example,…

Cryptography and Security · Computer Science 2017-12-19 Zhuotao Liu , Yushan Liu , Philipp Winter , Prateek Mittal , Yih-Chun Hu

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

The Lightning Network is a scaling solution for Bitcoin that promises to enable rapid and private payment processing. In Lightning, multi-hop payments are secured by utilizing Hashed Time-Locked Contracts (HTLCs) and encrypted on the…

Networking and Internet Architecture · Computer Science 2020-06-23 Elias Rohrer , Florian Tschorsch

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 Tor network provides users with strong anonymity by routing their internet traffic through multiple relays. While Tor encrypts traffic and hides IP addresses, it remains vulnerable to traffic analysis attacks such as the website…

Cryptography and Security · Computer Science 2026-01-06 Yuwen Cui , Guangjing Wang , Khanh Vu , Kai Wei , Kehan Shen , Zhengyuan Jiang , Xiao Han , Ning Wang , Zhuo Lu , Yao Liu

Stream-based communication dominates today's Internet, posing unique challenges for anonymous communication networks (ACNs). Traditionally designed for independent messages, ACNs struggle to account for the inherent vulnerabilities of…

Cryptography and Security · Computer Science 2025-04-22 Christoph Döpmann , Maximilian Weisenseel , Florian Tschorsch

Several hundred Tor exit relays together push more than 1 GiB/s of network traffic. However, it is easy for exit relays to snoop and tamper with anonymised network traffic and as all relays are run by independent volunteers, not all of them…

Cryptography and Security · Computer Science 2014-01-21 Philipp Winter , Stefan Lindskog

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

Attacks on Internet routing are typically viewed through the lens of availability and confidentiality, assuming an adversary that either discards traffic or performs eavesdropping. Yet, a strategic adversary can use routing attacks to…

Networking and Internet Architecture · Computer Science 2020-08-13 Yixin Sun , Maria Apostolaki , Henry Birge-Lee , Laurent Vanbever , Jennifer Rexford , Mung Chiang , Prateek Mittal

With the rapid increase of threats on the Internet, people are continuously seeking privacy and anonymity. Services such as Bitcoin and Tor were introduced to provide anonymity for online transactions and Web browsing. Due to its…

Cryptography and Security · Computer Science 2019-07-11 Husam Al Jawaheri , Mashael Al Sabah , Yazan Boshmaf , Aiman Erbad