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Deciding that two network flows are essentially the same is an important problem in intrusion detection and in tracing anonymous connections. A stepping stone or an anonymity network may try to prevent flow correlation by adding chaff…

Cryptography and Security · Computer Science 2013-10-18 Juan A. Elices , Fernando Perez-Gonzalez

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

Flow watermarks efficiently link packet flows in a network in order to thwart various attacks such as stepping stones. We study the problem of designing good flow watermarks. Earlier flow watermarking schemes mostly considered substitution…

Cryptography and Security · Computer Science 2013-06-17 Xun Gong , Mavis Rodrigues , Negar Kiyavash

Dynamic watermarking, as an active intrusion detection technique, can potentially detect replay attacks, spoofing attacks, and deception attacks in the feedback channel for control systems. In this paper, we develop a novel dynamic…

Systems and Control · Electrical Eng. & Systems 2021-11-10 Jiacheng Tang , Jiguo Song , Abhishek Gupta

Watermarking combines an imperceptible change to an input image that will trigger a detector, to assert provenance and protect intellectual property. The literature has shown great interest in attacks on watermarking schemes: attackers are…

Cryptography and Security · Computer Science 2026-05-19 Maria Bulychev , Neil G. Marchant , Benjamin I. P. Rubinstein

In this paper, we propose a new method for detecting unauthorized network intrusions, based on a traffic flow model and Cisco NetFlow protocol application. The method developed allows us not only to detect the most common types of network…

Cryptography and Security · Computer Science 2017-02-20 Aleksey A. Galtsev , Andrei M. Sukhov

Active techniques have been introduced to give better detectability performance for cyber-attack diagnosis in cyber-physical systems (CPS). In this paper, switching multiplicative watermarking is considered, whereby we propose an optimal…

Cryptography and Security · Computer Science 2025-12-03 Alexander J. Gallo , Sribalaji C. Anand , André M. H. Teixeira , Riccardo M. G. Ferrari

LLM watermarks stand out as a promising way to attribute ownership of LLM-generated text. One threat to watermark credibility comes from spoofing attacks, where an unauthorized third party forges the watermark, enabling it to falsely…

Cryptography and Security · Computer Science 2025-05-23 Thibaud Gloaguen , Nikola Jovanović , Robin Staab , Martin Vechev

Watermarking techniques have been proposed during the last 10 years as an approach to trace network flows for intrusion detection purposes. These techniques aim to impress a hidden signature on a traffic flow. A central property of network…

Cryptography and Security · Computer Science 2017-12-05 Alfonso Iacovazzi , Sanat Sarda , Daniel Frassinelli , Yuval Elovici

This paper presents an application of statistical machine learning to the field of watermarking. We propose a new attack model on additive spread-spectrum watermarking systems. The proposed attack is based on Bayesian statistics. We…

Cryptography and Security · Computer Science 2012-06-22 Ivo Shterev , David Dunson

Linking network flows is an important problem in intrusion detection as well as anonymity. Passive traffic analysis can link flows but requires long periods of observation to reduce errors. Active traffic analysis, also known as flow…

Cryptography and Security · Computer Science 2015-03-20 Amir Houmansadr , Negar Kiyavash , Nikita Borisov

In recent years, data poisoning attacks have been increasingly designed to appear harmless and even beneficial, often with the intention of verifying dataset ownership or safeguarding private data from unauthorized use. However, these…

Cryptography and Security · Computer Science 2025-10-13 Yifan Zhu , Lijia Yu , Xiao-Shan Gao

In recent years, there has been significant advancement in the field of model watermarking techniques. However, the protection of image-processing neural networks remains a challenge, with only a limited number of methods being developed.…

Cryptography and Security · Computer Science 2023-02-20 Huajie Chen , Tianqing Zhu , Chi Liu , Shui Yu , Wanlei Zhou

This paper considers the problem of designing physical watermark signals in order to optimally detect possible replay attack in a linear time-invariant system, under the assumption that the system parameters are unknown and need to be…

Systems and Control · Electrical Eng. & Systems 2019-11-06 Hanxiao Liu , Yilin Mo , Jiaqi Yan , Lihua Xie , Karl H. Johansson

Watermarking is a promising active diagnosis technique for detection of highly sophisticated attacks, but is vulnerable to malicious agents that use eavesdropped data to identify and then remove or replicate the watermark. In this work, we…

Systems and Control · Electrical Eng. & Systems 2023-09-06 Jiaxuan Zhang , Alexander J. Gallo , Riccardo M. G. Ferrari

Flow correlation attacks is an efficient network attacks, aiming to expose those who use anonymous network services, such as Tor. Conducting such attacks during the early stages of network communication is particularly critical for…

Cryptography and Security · Computer Science 2025-03-24 Yali Yuan , Qianqi Niu , Yachao Yuan

Community detection of network flows conventionally assumes one-step dynamics on the links. For sparse networks and interest in large-scale structures, longer timescales may be more appropriate. Oppositely, for large networks and interest…

Social and Information Networks · Computer Science 2016-03-22 Masoumeh Kheirkhahzadeh , Andrea Lancichinetti , Martin Rosvall

Deep neural nets achieve state-of-the-art performance on the problem of optical flow estimation. Since optical flow is used in several safety-critical applications like self-driving cars, it is important to gain insights into the robustness…

Computer Vision and Pattern Recognition · Computer Science 2019-10-23 Anurag Ranjan , Joel Janai , Andreas Geiger , Michael J. Black

Backdoor attack aims to deceive a victim model when facing backdoor instances while maintaining its performance on benign data. Current methods use manual patterns or special perturbations as triggers, while they often overlook the…

Computer Vision and Pattern Recognition · Computer Science 2024-01-05 Ruofei Wang , Renjie Wan , Zongyu Guo , Qing Guo , Rui Huang

Network traffic analysis reveals important information even when messages are encrypted. We consider active traffic analysis via flow fingerprinting by invisibly embedding information into packet timings of flows. In particular, assume…

Networking and Internet Architecture · Computer Science 2018-09-25 Ramin Soltani , Dennis Goeckel , Don Towsley , Amir Houmansadr
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