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Deep Neural Networks (DNNs) are commonly used for various traffic analysis problems, such as website fingerprinting and flow correlation, as they outperform traditional (e.g., statistical) techniques by large margins. However, deep neural…

Cryptography and Security · Computer Science 2020-02-18 Milad Nasr , Alireza Bahramali , Amir Houmansadr

The primary objective of an anonymity tool is to protect the anonymity of its users through the implementation of strong encryption and obfuscation techniques. As a result, it becomes very difficult to monitor and identify users activities…

Cryptography and Security · Computer Science 2023-11-29 Javeriah Saleem , Rafiqul Islam , Zahidul Islam

The network flow watermarking technique associates the two communicating parties by actively modifying certain characteristics of the stream generated by the sender so that it covertly carries some special marking information. Some curious…

Networking and Internet Architecture · Computer Science 2024-02-08 Yali Yuan , Jian Ge , Guang Cheng

Website Fingerprinting (WF) attacks raise major concerns about users' privacy. They employ Machine Learning (ML) to allow a local passive adversary to uncover the Web browsing behavior of a user, even if she browses through an encrypted…

Cryptography and Security · Computer Science 2017-12-08 Giovanni Cherubin

Tor is vulnerable to network-level adversaries who can observe both ends of the communication to deanonymize users. Recent work has shown that Tor is susceptible to the previously unknown active BGP routing attacks, called RAPTOR attacks,…

Cryptography and Security · Computer Science 2017-04-07 Yixin Sun , Anne Edmundson , Nick Feamster , Mung Chiang , Prateek Mittal

TOR (The Onion Router) network is a widely used open source anonymous communication tool, the abuse of TOR makes it difficult to monitor the proliferation of online crimes such as to access criminal websites. Most existing approches for TOR…

Cryptography and Security · Computer Science 2022-09-27 Haili Sun , Yan Huang , Lansheng Han , Xiang Long , Hongle Liu , Chunjie Zhou

Website fingerprinting attacks, which use statistical analysis on network traffic to compromise user privacy, have been shown to be effective even if the traffic is sent over anonymity-preserving networks such as Tor. The classical attack…

Cryptography and Security · Computer Science 2019-02-22 Anatoly Shusterman , Lachlan Kang , Yarden Haskal , Yosef Meltser , Prateek Mittal , Yossi Oren , Yuval Yarom

Deep Neural Networks (DNNs) are increasingly applied in the real world in safety critical applications like advanced driver assistance systems. An example for such use case is represented by traffic sign recognition systems. At the same…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 Fabian Woitschek , Georg Schneider

To date, traffic obfuscation techniques have been widely adopted to protect network data privacy and security by obscuring the true patterns of traffic. Nevertheless, as the pre-trained models emerge, especially transformer-based…

Cryptography and Security · Computer Science 2025-12-25 Quanliang Jing , Xinxin Fan , Yanyan Liu , Jingping Bi

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

Instant Messaging (IM) applications like Telegram, Signal, and WhatsApp have become extremely popular in recent years. Unfortunately, such IM services have been targets of continuous governmental surveillance and censorship, as these…

Cryptography and Security · Computer Science 2020-05-06 Alireza Bahramali , Ramin Soltani , Amir Houmansadr , Dennis Goeckel , Don Towsley

While pre-trained large models have achieved state-of-the-art performance in network traffic analysis, their prohibitive computational costs hinder deployment in real-time, throughput-sensitive network defense environments. This work…

Cryptography and Security · Computer Science 2026-01-05 Jiajun Zhou , Changhui Sun , Meng Shen , Shanqing Yu , Qi Xuan

While deep convolutional neural networks (CNNs) are vulnerable to adversarial attacks, considerably few efforts have been paid to construct robust deep tracking algorithms against adversarial attacks. Current studies on adversarial attack…

Computer Vision and Pattern Recognition · Computer Science 2020-07-30 Shuai Jia , Chao Ma , Yibing Song , Xiaokang Yang

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

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

Machine learning and deep learning algorithms can be used to classify encrypted Internet traffic. Classification of encrypted traffic can become more challenging in the presence of adversarial attacks that target the learning algorithms. In…

Cryptography and Security · Computer Science 2021-06-01 Ramy Maarouf , Danish Sattar , Ashraf Matrawy

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) attacks aim to infer which websites a user is visiting by analyzing traffic patterns, thereby compromising user anonymity. Although this technique has been demonstrated to be effective in controlled experimental…

Cryptography and Security · Computer Science 2025-06-26 Yali Yuan , Weiyi Zou , Guang Cheng

Real-time traffic prediction models play a pivotal role in smart mobility systems and have been widely used in route guidance, emerging mobility services, and advanced traffic management systems. With the availability of massive traffic…

Machine Learning · Computer Science 2021-04-20 Lyuyi Zhu , Kairui Feng , Ziyuan Pu , Wei Ma

Tor users are vulnerable to deanonymization by an adversary that can observe some Tor relays or some parts of the network. We demonstrate that previous network-aware path-selection algorithms that propose to solve this problem are…

Cryptography and Security · Computer Science 2017-01-30 Aaron Johnson , Rob Jansen , Aaron D. Jaggard , Joan Feigenbaum , Paul Syverson