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Natural language processing models are vulnerable to adversarial examples. Previous textual adversarial attacks adopt gradients or confidence scores to calculate word importance ranking and generate adversarial examples. However, this…

计算与语言 · 计算机科学 2024-01-11 Hai Zhu , Zhaoqing Yang , Weiwei Shang , Yuren Wu

Recent study of adversarial attacks has revealed the vulnerability of modern deep learning models. That is, subtly crafted perturbations of the input can make a trained network with high accuracy produce arbitrary incorrect predictions,…

机器学习 · 计算机科学 2023-04-11 Xiao Wang , Siyue Wang , Pin-Yu Chen , Xue Lin , Peter Chin

We propose LSDAT, an image-agnostic decision-based black-box attack that exploits low-rank and sparse decomposition (LSD) to dramatically reduce the number of queries and achieve superior fooling rates compared to the state-of-the-art…

计算机视觉与模式识别 · 计算机科学 2021-03-23 Ashkan Esmaeili , Marzieh Edraki , Nazanin Rahnavard , Mubarak Shah , Ajmal Mian

Retrieval-Augmented Generation (RAG) enhances large language models (LLMs) by incorporating external knowledge, but its openness introduces vulnerabilities that can be exploited by poisoning attacks. Existing poisoning methods for RAG…

密码学与安全 · 计算机科学 2025-05-27 Chunyang Li , Junwei Zhang , Anda Cheng , Zhuo Ma , Xinghua Li , Jianfeng Ma

With the rapid development of quantum computers, quantum algorithms have been studied extensively. However, quantum algorithms tackling statistical problems are still lacking. In this paper, we propose a novel non-oracular quantum adaptive…

统计方法学 · 统计学 2021-07-20 Wenxuan Zhong , Yuan Ke , Ye Wang , Yongkai Chen , Jinyang Chen , Ping Ma

Partition functions arise in a variety of settings, including conditional random fields, logistic regression, and latent gaussian models. In this paper, we consider semistochastic quadratic bound (SQB) methods for maximum likelihood…

机器学习 · 统计学 2014-02-19 Aleksandr Y. Aravkin , Anna Choromanska , Tony Jebara , Dimitri Kanevsky

We study adversarial examples in a black-box setting where the adversary only has API access to the target model and each query is expensive. Prior work on black-box adversarial examples follows one of two main strategies: (1) transfer…

密码学与安全 · 计算机科学 2019-12-03 Fnu Suya , Jianfeng Chi , David Evans , Yuan Tian

Adversarial attacks against Large Vision-Language Models (LVLMs) are crucial for exposing safety vulnerabilities in modern multimodal systems. Recent attacks based on input transformations, such as random cropping, suggest that spatially…

计算机视觉与模式识别 · 计算机科学 2026-02-05 Jaehyun Kwak , Nam Cao , Boryeong Cho , Segyu Lee , Sumyeong Ahn , Se-Young Yun

We introduce a novel approach for sequence decoding, Discriminative Adversarial Search (DAS), which has the desirable properties of alleviating the effects of exposure bias without requiring external metrics. Inspired by Generative…

计算与语言 · 计算机科学 2020-09-01 Thomas Scialom , Paul-Alexis Dray , Sylvain Lamprier , Benjamin Piwowarski , Jacopo Staiano

Black-box adversarial attacks generate adversarial samples via iterative optimizations using repeated queries. Defending deep neural networks against such attacks has been challenging. In this paper, we propose an efficient Boundary Defense…

密码学与安全 · 计算机科学 2022-02-01 Manjushree B. Aithal , Xiaohua Li

Active learning (AL) has found wide applications in medical image segmentation, aiming to alleviate the annotation workload and enhance performance. Conventional uncertainty-based AL methods, such as entropy and Bayesian, often rely on an…

计算机视觉与模式识别 · 计算机科学 2024-01-30 Siteng Ma , Haochang Wu , Aonghus Lawlor , Ruihai Dong

Deep learning models are vulnerable to adversarial examples, which can fool a target classifier by imposing imperceptible perturbations onto natural examples. In this work, we consider the practical and challenging decision-based black-box…

机器学习 · 计算机科学 2021-05-11 Qi-An Fu , Yinpeng Dong , Hang Su , Jun Zhu

Adversarial attacks have threatened the application of deep neural networks in security-sensitive scenarios. Most existing black-box attacks fool the target model by interacting with it many times and producing global perturbations.…

计算机视觉与模式识别 · 计算机科学 2021-01-05 Tao Xiang , Hangcheng Liu , Shangwei Guo , Tianwei Zhang , Xiaofeng Liao

Plagiarism is one of the leading problems in academic and industrial environments, which its goal is to find the similar items in a typical document or source code. This paper proposes an architecture based on a Long Short-Term Memory…

The rapid evolution towards the sixth-generation (6G) networks demands advanced beamforming techniques to address challenges in dynamic, high-mobility scenarios, such as vehicular communications. Vision-based beam prediction utilizing RGB…

网络与互联网体系结构 · 计算机科学 2025-04-08 Avi Deb Raha , Kitae Kim , Mrityunjoy Gain , Apurba Adhikary , Zhu Han , Eui-Nam Huh , Choong Seon Hong

We consider the thresholding bandit problem, whose goal is to find arms of mean rewards above a given threshold $\theta$, with a fixed budget of $T$ trials. We introduce LSA, a new, simple and anytime algorithm that aims to minimize the…

机器学习 · 计算机科学 2019-05-28 Chao Tao , Saùl Blanco , Jian Peng , Yuan Zhou

Neural Architectures Search (NAS) becomes more and more popular over these years. However, NAS-generated models tends to suffer greater vulnerability to various malicious attacks. Lots of robust NAS methods leverage adversarial training to…

机器学习 · 计算机科学 2023-04-11 Xunyu Zhu , Jian Li , Yong Liu , Weiping Wang

Linear discriminant analysis (LDA) is a classical method for dimensionality reduction, where discriminant vectors are sought to project data to a lower dimensional space for optimal separability of classes. Several recent papers have…

统计计算 · 统计学 2022-03-04 Summer Atkins , Gudmundur Einarsson , Brendan Ames , Line Clemmensen

Large Language Model (LLM) cascade systems are designed to balance efficiency and performance by processing queries with lightweight models while selectively escalating complex cases to more powerful ones. Such systems seek to reduces…

密码学与安全 · 计算机科学 2026-05-19 Zehan Sun , Dingfan Chen , Songze Li

Blackbox adversarial attacks can be categorized into transfer- and query-based attacks. Transfer methods do not require any feedback from the victim model, but provide lower success rates compared to query-based methods. Query attacks often…

机器学习 · 计算机科学 2022-11-28 Zikui Cai , Chengyu Song , Srikanth Krishnamurthy , Amit Roy-Chowdhury , M. Salman Asif