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Website fingerprinting (WF) attacks, usually conducted with the help of a machine learning-based classifier, enable a network eavesdropper to pinpoint which web page a user is accessing through the inspection of traffic patterns. These…

Cryptography and Security · Computer Science 2022-11-29 Alexander Veicht , Cedric Renggli , Diogo Barradas

Website Fingerprinting (WF) attacks exploit patterns in encrypted traffic to infer the websites visited by users, posing a serious threat to anonymous communication systems. Although recent WF techniques achieve over 90% accuracy in…

Cryptography and Security · Computer Science 2025-10-17 Xinhao Deng , Jingyou Chen , Linxiao Yu , Yixiang Zhang , Zhongyi Gu , Changhao Qiu , Xiyuan Zhao , Ke Xu , Qi Li

Website fingerprinting (WF) is a well-know threat to users' web privacy. New internet standards, such as QUIC, include padding to support defenses against WF. Previous work only analyzes the effectiveness of defenses when users are behind a…

Cryptography and Security · Computer Science 2022-12-16 Sandra Siby , Ludovic Barman , Christopher Wood , Marwan Fayed , Nick Sullivan , Carmela Troncoso

Website Fingerprinting (WF) attacks are used by local passive attackers to determine the destination of encrypted internet traffic by comparing the sequences of packets sent to and received by the user to a previously recorded data set. As…

Cryptography and Security · Computer Science 2021-09-23 James K Holland , Nicholas Hopper

Website fingerprinting (WF) attacks identify the websites visited over anonymized connections by analyzing patterns in network traffic flows, such as packet sizes, directions, or interval times using a machine learning classifier. Previous…

Cryptography and Security · Computer Science 2024-07-30 Chuxu Song , Zining Fan , Hao Wang , Richard Martin

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

Tor provides low-latency anonymous and uncensored network access against a local or network adversary. Due to the design choice to minimize traffic overhead (and increase the pool of potential users) Tor allows some information about the…

Cryptography and Security · Computer Science 2019-06-06 Shuai Li , Huajun Guo , Nicholas Hopper

Website Fingerprinting (WF) is a type of traffic analysis attack that enables a local passive eavesdropper to infer the victim's activity, even when the traffic is protected by a VPN or an anonymity system like Tor. Leveraging a…

Cryptography and Security · Computer Science 2022-11-15 Mohammad Saidur Rahman , Mohsen Imani , Nate Mathews , Matthew Wright

Website Fingerprinting (WF) is an effective tool for regulating and governing the dark web. However, its performance can be significantly degraded by backdoor poisoning attacks in practical deployments. This paper aims to address the…

Cryptography and Security · Computer Science 2025-06-17 Yali Yuan , Kai Xu , Ruolin Ma , Yuchen Zhang

Website fingerprinting (WF) is a dangerous attack on web privacy because it enables an adversary to predict the website a user is visiting, despite the use of encryption, VPNs, or anonymizing networks such as Tor. Previous WF work almost…

Cryptography and Security · Computer Science 2026-01-22 Rob Jansen , Ryan Wails , Aaron Johnson

Website fingerprinting attacks enable an adversary to infer which website a victim is visiting, even if the victim uses an encrypting proxy, such as Tor. Previous work has shown that all proposed defenses against website fingerprinting…

Cryptography and Security · Computer Science 2014-01-24 Xiang Cai , Rishab Nithyanand , Rob Johnson

Anonymity systems like Tor are vulnerable to Website Fingerprinting (WF) attacks, where a local passive eavesdropper infers the victim's activity. Current WF attacks based on deep learning classifiers have successfully overcome numerous…

Cryptography and Security · Computer Science 2021-02-09 Shawn Shan , Arjun Nitin Bhagoji , Haitao Zheng , Ben Y. Zhao

Website fingerprinting (WF) attacks, which covertly monitor user communications to identify the web pages they visit, pose a serious threat to user privacy. Existing WF defenses attempt to reduce attack accuracy by disrupting traffic…

Cryptography and Security · Computer Science 2026-02-23 Siyuan Liang , Jiajun Gong , Tianmeng Fang , Aishan Liu , Tao Wang , Xiaochun Cao , Dacheng Tao , Ee-Chien Chang

Website fingerprinting (WF) attacks on Tor can infer user destinations from encrypted traffic metadata. However, their real-world effectiveness remains debated due to laboratory settings that fail to capture network fluctuations, evaluate…

Cryptography and Security · Computer Science 2026-03-10 Mohammadhamed Shadbeh , Khashayar Khajavi , Tao Wang

Website fingerprinting enables a local eavesdropper to determine which websites a user is visiting over an encrypted connection. State-of-the-art website fingerprinting attacks have been shown to be effective even against Tor. Recently,…

Cryptography and Security · Computer Science 2018-08-21 Payap Sirinam , Mohsen Imani , Marc Juarez , Matthew Wright

Tor, an onion-routing anonymity network, has been shown to be vulnerable to Website Fingerprinting (WF), which de-anonymizes web browsing by analyzing the unique characteristics of the encrypted network traffic. Although many defenses have…

Cryptography and Security · Computer Science 2021-11-25 Jiajun Gong , Wuqi Zhang , Charles Zhang , Tao Wang

Website Fingerprinting (WF) is considered a major threat to the anonymity of Tor users (and other anonymity systems). While state-of-the-art WF techniques have claimed high attack accuracies, e.g., by leveraging Deep Neural Networks (DNN),…

Cryptography and Security · Computer Science 2023-09-20 Alireza Bahramali , Ardavan Bozorgi , Amir Houmansadr

Website Fingerprinting attacks enable a passive eavesdropper to recover the user's otherwise anonymized web browsing activity by matching the observed traffic with prerecorded web traffic templates. The defenses that have been proposed to…

Cryptography and Security · Computer Science 2016-07-20 Marc Juarez , Mohsen Imani , Mike Perry , Claudia Diaz , Matthew Wright

Website fingerprinting attack is an extensively studied technique used in a web browser to analyze traffic patterns and thus infer confidential information about users. Several website fingerprinting attacks based on machine learning and…

Cryptography and Security · Computer Science 2023-02-28 Guodong Huang , Chuan Ma , Ming Ding , Yuwen Qian , Chunpeng Ge , Liming Fang , Zhe Liu

As large language models are increasingly deployed in sensitive environments, fingerprinting attacks pose significant privacy and security risks. We present a study of LLM fingerprinting from both offensive and defensive perspectives. Our…

Cryptography and Security · Computer Science 2025-08-13 Kevin Kurian , Ethan Holland , Sean Oesch
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