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Recent advancements in offline reinforcement learning (RL) have underscored the capabilities of Return-Conditioned Supervised Learning (RCSL), a paradigm that learns the action distribution based on target returns for each state in a…

Machine Learning · Computer Science 2023-12-22 Yuanfu Wang , Chao Yang , Ying Wen , Yu Liu , Yu Qiao

Retrieval Augmented Generation (RAG) frameworks improve the accuracy of large language models (LLMs) by integrating external knowledge from retrieved documents, thereby overcoming the limitations of models' static intrinsic knowledge.…

Information Retrieval · Computer Science 2025-09-19 Jingjie Zheng , Aryo Pradipta Gema , Giwon Hong , Xuanli He , Pasquale Minervini , Youcheng Sun , Qiongkai Xu

Backdoor attacks (BA) are an emerging threat to deep neural network classifiers. A classifier being attacked will predict to the attacker's target class when a test sample from a source class is embedded with the backdoor pattern (BP).…

Cryptography and Security · Computer Science 2021-10-22 Zhen Xiang , David J. Miller , Siheng Chen , Xi Li , George Kesidis

Deep learning-based lane detection (LD) plays a critical role in autonomous driving and advanced driver assistance systems. However, its vulnerability to backdoor attacks presents a significant security concern. Existing backdoor attack…

Cryptography and Security · Computer Science 2026-03-26 Yifan Liao , Yuxin Cao , Yedi Zhang , Wentao He , Yan Xiao , Xianglong Du , Zhiyong Huang , Jin Song Dong

Federated Learning (FL) has emerged as a promising privacy-preserving collaborative model training paradigm without sharing raw data. However, recent studies have revealed that private information can still be leaked through shared gradient…

Cryptography and Security · Computer Science 2026-01-12 Pengxin Guo , Runxi Wang , Shuang Zeng , Jinjing Zhu , Haoning Jiang , Yanran Wang , Yuyin Zhou , Feifei Wang , Hui Xiong , Liangqiong Qu

Reinforcement learning (RL) policies deployed in safety-critical systems, such as unmanned aerial vehicle (UAV) navigation in dynamic airspace, are vulnerable to out-ofdistribution (OOD) adversarial attacks in the observation space. These…

Machine Learning · Computer Science 2025-06-27 Deepak Kumar Panda , Adolfo Perrusquia , Weisi Guo

Federated learning, an innovative network architecture designed to safeguard user privacy, is gaining widespread adoption in the realm of technology. However, given the existence of backdoor attacks in federated learning, exploring the…

Cryptography and Security · Computer Science 2024-08-27 Weida Xu , Yang Xu , Sicong Zhang

In online continual learning (CL), models trained on changing distributions easily forget previously learned knowledge and bias toward newly received tasks. To address this issue, we present Continual Bias Adaptor (CBA), a bi-level…

Machine Learning · Computer Science 2024-08-27 Quanziang Wang , Renzhen Wang , Yichen Wu , Xixi Jia , Minghao Zhou , Deyu Meng

Risk-sensitive reinforcement learning (RL) is crucial for maintaining reliable performance in high-stakes applications. While traditional RL methods aim to learn a point estimate of the random cumulative cost, distributional RL (DRL) seeks…

Machine Learning · Computer Science 2025-02-03 Minheng Xiao , Xian Yu , Lei Ying

The adversarial attack methods based on gradient information can adequately find the perturbations, that is, the combinations of rewired links, thereby reducing the effectiveness of the deep learning model based graph embedding algorithms,…

Social and Information Networks · Computer Science 2020-12-22 Jinyin Chen , Yixian Chen , Haibin Zheng , Shijing Shen , Shanqing Yu , Dan Zhang , Qi Xuan

We present BadGD, a unified theoretical framework that exposes the vulnerabilities of gradient descent algorithms through strategic backdoor attacks. Backdoor attacks involve embedding malicious triggers into a training dataset to disrupt…

Machine Learning · Computer Science 2024-05-28 Chi-Hua Wang , Guang Cheng

Recently, 3D backdoor attacks have posed a substantial threat to 3D Deep Neural Networks (3D DNNs) designed for 3D point clouds, which are extensively deployed in various security-critical applications. Although the existing 3D backdoor…

Computer Vision and Pattern Recognition · Computer Science 2024-12-17 Xiaoyang Ning , Qing Xie , Jinyu Xu , Wenbo Jiang , Jiachen Li , Yanchun Ma

Backdoor attacks change a small portion of training data by introducing hand-crafted triggers and rewiring the corresponding labels towards a desired target class. Training on such data injects a backdoor which causes malicious inference in…

Machine Learning · Computer Science 2024-09-05 Ivan Sabolić , Ivan Grubišić , Siniša Šegvić

Federated Learning (FL) enables distributed participants (e.g., mobile devices) to train a global model without sharing data directly to a central server. Recent studies have revealed that FL is vulnerable to gradient inversion attack…

Cryptography and Security · Computer Science 2023-09-15 Jiaheng Wei , Yanjun Zhang , Leo Yu Zhang , Chao Chen , Shirui Pan , Kok-Leong Ong , Jun Zhang , Yang Xiang

Recent studies have shown that cooperative multi-agent deep reinforcement learning (c-MADRL) is under the threat of backdoor attacks. Once a backdoor trigger is observed, it will perform malicious actions leading to failures or malicious…

Artificial Intelligence · Computer Science 2025-07-21 Jing Fang , Saihao Yan , Xueyu Yin , Yinbo Yu , Chunwei Tian , Jiajia Liu

Deep Reinforcement Learning (DRL) algorithms have recently made significant strides in improving network performance. Nonetheless, their practical use is still limited in the absence of safe exploration and safe decision-making. In the…

Networking and Internet Architecture · Computer Science 2024-01-12 Lam Dinh , Pham Tran Anh Quang , Jérémie Leguay

Online continual learning (CL) aims to learn new knowledge and consolidate previously learned knowledge from non-stationary data streams. Due to the time-varying training setting, the model learned from a changing distribution easily…

Machine Learning · Computer Science 2023-08-15 Quanziang Wang , Renzhen Wang , Yichen Wu , Xixi Jia , Deyu Meng

Large language models (LLMs) increasingly employ guardrails to enforce ethical, legal, and application-specific constraints on their outputs. While effective at mitigating harmful responses, these guardrails introduce a new class of…

Cryptography and Security · Computer Science 2025-11-07 Hongwei Yao , Yun Xia , Shuo Shao , Haoran Shi , Tong Qiao , Cong Wang

We study the problem of attacking a machine learning model in the hard-label black-box setting, where no model information is revealed except that the attacker can make queries to probe the corresponding hard-label decisions. This is a very…

Machine Learning · Computer Science 2018-07-13 Minhao Cheng , Thong Le , Pin-Yu Chen , Jinfeng Yi , Huan Zhang , Cho-Jui Hsieh

Recent advancements in deep reinforcement learning (RL) have demonstrated notable progress in sample efficiency, spanning both model-based and model-free paradigms. Despite the identification and mitigation of specific bottlenecks in prior…

Machine Learning · Computer Science 2024-04-02 Yibo Wang , Jiang Zhao