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The threats faced by cyber-physical systems (CPSs) in critical infrastructure have motivated research into a multitude of attack detection mechanisms, including anomaly detectors based on neural network models. The effectiveness of anomaly…

密码学与安全 · 计算机科学 2021-06-16 Yifan Jia , Jingyi Wang , Christopher M. Poskitt , Sudipta Chattopadhyay , Jun Sun , Yuqi Chen

Over the last few years, convolutional neural networks (CNNs) have proved to reach super-human performance in visual recognition tasks. However, CNNs can easily be fooled by adversarial examples, i.e., maliciously-crafted images that force…

计算机视觉与模式识别 · 计算机科学 2021-08-17 Federico Nesti , Alessandro Biondi , Giorgio Buttazzo

Deep Neural Networks (DNNs) have been shown to be vulnerable against adversarial examples, which are data points cleverly constructed to fool the classifier. Such attacks can be devastating in practice, especially as DNNs are being applied…

密码学与安全 · 计算机科学 2018-01-30 Linh Nguyen , Sky Wang , Arunesh Sinha

We propose a new ensemble method for detecting and classifying adversarial examples generated by state-of-the-art attacks, including DeepFool and C&W. Our method works by training the members of an ensemble to have low classification error…

机器学习 · 计算机科学 2017-12-13 Alexander Bagnall , Razvan Bunescu , Gordon Stewart

Adversarial attacks pose significant challenges for detecting adversarial attacks at an early stage. We propose attack-agnostic detection on reinforcement learning-based interactive recommendation systems. We first craft adversarial…

机器学习 · 计算机科学 2020-06-16 Yuanjiang Cao , Xiaocong Chen , Lina Yao , Xianzhi Wang , Wei Emma Zhang

Neural networks are known to be vulnerable to adversarial attacks -- slight but carefully constructed perturbations of the inputs which can drastically impair the network's performance. Many defense methods have been proposed for improving…

Pattern recognition and machine learning techniques have been increasingly adopted in adversarial settings such as spam, intrusion and malware detection, although their security against well-crafted attacks that aim to evade detection by…

机器学习 · 计算机科学 2020-05-26 Fei Zhang , Patrick P. K. Chan , Battista Biggio , Daniel S. Yeung , Fabio Roli

Many unsupervised visual anomaly detection methods train an auto-encoder to reconstruct normal samples and then leverage the reconstruction error map to detect and localize the anomalies. However, due to the powerful modeling and…

计算机视觉与模式识别 · 计算机科学 2024-12-18 Qingqing Fang , Qinliang Su , Wenxi Lv , Wenchao Xu , Jianxing Yu

We propose a new adversarial attack to Deep Neural Networks for image classification. Different from most existing attacks that directly perturb input pixels, our attack focuses on perturbing abstract features, more specifically, features…

机器学习 · 计算机科学 2020-12-17 Qiuling Xu , Guanhong Tao , Siyuan Cheng , Xiangyu Zhang

Adversarial sample attacks perturb benign inputs to induce DNN misbehaviors. Recent research has demonstrated the widespread presence and the devastating consequences of such attacks. Existing defense techniques either assume prior…

机器学习 · 计算机科学 2018-10-30 Guanhong Tao , Shiqing Ma , Yingqi Liu , Xiangyu Zhang

Neural network based classifiers are still prone to manipulation through adversarial perturbations. State of the art attacks can overcome most of the defense or detection mechanisms suggested so far, and adversaries have the upper hand in…

机器学习 · 计算机科学 2018-12-05 Ziv Katzir , Yuval Elovici

This is Btech thesis report on detection and purification of adverserially attacked images. A deep learning model is trained on certain training examples for various tasks such as classification, regression etc. By training, weights are…

机器学习 · 计算机科学 2022-05-18 Dvij Kalaria

Deep neural networks for classification are vulnerable to adversarial attacks, where small perturbations to input samples lead to incorrect predictions. This susceptibility, combined with the black-box nature of such networks, limits their…

密码学与安全 · 计算机科学 2024-08-28 Dipkamal Bhusal , Md Tanvirul Alam , Monish K. Veerabhadran , Michael Clifford , Sara Rampazzi , Nidhi Rastogi

Existing face forgery detection methods usually treat face forgery detection as a binary classification problem and adopt deep convolution neural networks to learn discriminative features. The ideal discriminative features should be only…

计算机视觉与模式识别 · 计算机科学 2022-07-11 Wanyi Zhuang , Qi Chu , Haojie Yuan , Changtao Miao , Bin Liu , Nenghai Yu

Adversarial attacks involve adding, small, often imperceptible, perturbations to inputs with the goal of getting a machine learning model to misclassifying them. While many different adversarial attack strategies have been proposed on image…

计算机视觉与模式识别 · 计算机科学 2018-06-01 Avishek Joey Bose , Parham Aarabi

Recently, many studies have demonstrated deep neural network (DNN) classifiers can be fooled by the adversarial example, which is crafted via introducing some perturbations into an original sample. Accordingly, some powerful defense…

密码学与安全 · 计算机科学 2019-01-10 Bin Liang , Hongcheng Li , Miaoqiang Su , Xirong Li , Wenchang Shi , Xiaofeng Wang

Deep neural network (DNN) classifiers are powerful tools that drive a broad spectrum of important applications, from image recognition to autonomous vehicles. Unfortunately, DNNs are known to be vulnerable to adversarial attacks that affect…

密码学与安全 · 计算机科学 2022-08-08 Saikat Majumdar , Mohammad Hossein Samavatian , Kristin Barber , Radu Teodorescu

Pre-trained contextualized language models (PrLMs) have led to strong performance gains in downstream natural language understanding tasks. However, PrLMs can still be easily fooled by adversarial word substitution, which is one of the most…

计算与语言 · 计算机科学 2021-06-01 Rongzhou Bao , Jiayi Wang , Hai Zhao

In this paper, we investigate algorithms for anomaly detection. Previous anomaly detection methods focus on modeling the distribution of non-anomalous data provided during training. However, this does not necessarily ensure the correct…

机器学习 · 计算机科学 2020-05-29 Ziyi Yang , Iman Soltani Bozchalooi , Eric Darve

This paper showcases an experimental study on anomaly detection using computer vision. The study focuses on class distinction and performance evaluation, combining OpenCV with deep learning techniques while employing a TensorFlow-based…

计算机视觉与模式识别 · 计算机科学 2025-03-26 Md. Barkat Ullah Tusher , Shartaz Khan Akash , Amirul Islam Showmik