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Backdoor (Trojan) attacks are an important type of adversarial exploit against deep neural networks (DNNs), wherein a test instance is (mis)classified to the attacker's target class whenever the attacker's backdoor trigger is present. In…

Machine Learning · Computer Science 2023-08-22 Xi Li , Zhen Xiang , David J. Miller , George Kesidis

We develop Upside-Down Reinforcement Learning (UDRL), a method for learning to act using only supervised learning techniques. Unlike traditional algorithms, UDRL does not use reward prediction or search for an optimal policy. Instead, it…

Machine Learning · Computer Science 2021-09-07 Rupesh Kumar Srivastava , Pranav Shyam , Filipe Mutz , Wojciech Jaśkowski , Jürgen Schmidhuber

Adversarial attacks against conventional Deep Learning (DL) systems and algorithms have been widely studied, and various defenses were proposed. However, the possibility and feasibility of such attacks against Deep Reinforcement Learning…

Cryptography and Security · Computer Science 2020-05-15 Jianwen Sun , Tianwei Zhang , Xiaofei Xie , Lei Ma , Yan Zheng , Kangjie Chen , Yang Liu

Deep neural networks face persistent challenges in defending against backdoor attacks, leading to an ongoing battle between attacks and defenses. While existing backdoor defense strategies have shown promising performance on reducing attack…

Computer Vision and Pattern Recognition · Computer Science 2024-05-31 Mingli Zhu , Siyuan Liang , Baoyuan Wu

Deep neural networks (DNNs) are vulnerable to backdoor attacks, where a backdoored model behaves normally with clean inputs but exhibits attacker-specified behaviors upon the inputs containing triggers. Most previous backdoor attacks mainly…

Cryptography and Security · Computer Science 2024-07-02 Linshan Hou , Zhongyun Hua , Yuhong Li , Yifeng Zheng , Leo Yu Zhang

Deep neural networks (DNNs) have made tremendous progress in the past ten years and have been applied in various critical applications. However, recent studies have shown that deep neural networks are vulnerable to backdoor attacks. By…

Cryptography and Security · Computer Science 2023-05-19 Xinrui Liu , Yajie Wang , Yu-an Tan , Kefan Qiu , Yuanzhang Li

Outsourced training and machine learning as a service have resulted in novel attack vectors like backdoor attacks. Such attacks embed a secret functionality in a neural network activated when the trigger is added to its input. In most works…

Cryptography and Security · Computer Science 2022-11-08 Stefanos Koffas , Stjepan Picek , Mauro Conti

Masked diffusion language models (MDLMs) are emerging as a compelling new paradigm for text generation, but their training-time security remains largely unexplored. Existing backdoor attacks on Gaussian diffusion models or autoregressive…

Machine Learning · Computer Science 2026-05-20 Daniel Yiming Cao , Chengzhong Wang , Sheng-Yen Chou , Chengyu Huang , Pin-Yu Chen , Shengwei An

Evaluating deep reinforcement learning (DRL) agents against targeted behavior attacks is critical for assessing their robustness. These attacks aim to manipulate the victim into specific behaviors that align with the attacker's objectives,…

Machine Learning · Computer Science 2024-12-17 Fengshuo Bai , Runze Liu , Yali Du , Ying Wen , Yaodong Yang

While real-world applications of reinforcement learning are becoming popular, the security and robustness of RL systems are worthy of more attention and exploration. In particular, recent works have revealed that, in a multi-agent RL…

Machine Learning · Computer Science 2023-09-15 Junfeng Guo , Ang Li , Cong Liu

Backdoor attacks inject poisoning samples during training, with the goal of forcing a machine learning model to output an attacker-chosen class when presented a specific trigger at test time. Although backdoor attacks have been demonstrated…

Recently backdoor attack has become an emerging threat to the security of deep neural network (DNN) models. To date, most of the existing studies focus on backdoor attack against the uncompressed model; while the vulnerability of compressed…

Cryptography and Security · Computer Science 2022-08-24 Huy Phan , Cong Shi , Yi Xie , Tianfang Zhang , Zhuohang Li , Tianming Zhao , Jian Liu , Yan Wang , Yingying Chen , Bo Yuan

Knowledge Distillation (KD) is essential for compressing large models, yet relying on pre-trained "teacher" models downloaded from third-party repositories introduces serious security risks--most notably backdoor attacks. Existing KD…

Cryptography and Security · Computer Science 2026-05-26 Shanmin Wang , Dongdong Zhao

Backdoor attacks are commonly executed by contaminating training data, such that a trigger can activate predetermined harmful effects during the test phase. In this work, we present AnyDoor, a test-time backdoor attack against multimodal…

Computation and Language · Computer Science 2024-02-14 Dong Lu , Tianyu Pang , Chao Du , Qian Liu , Xianjun Yang , Min Lin

Recent studies in multi-agent communicative reinforcement learning (MACRL) have demonstrated that multi-agent coordination can be greatly improved by allowing communication between agents. Meanwhile, adversarial machine learning (ML) has…

Machine Learning · Computer Science 2022-01-27 Wanqi Xue , Wei Qiu , Bo An , Zinovi Rabinovich , Svetlana Obraztsova , Chai Kiat Yeo

Federated Learning (FL) enables collaborative training of Deep Learning (DL) models where the data is retained locally. Like DL, FL has severe security weaknesses that the attackers can exploit, e.g., model inversion and backdoor attacks.…

Cryptography and Security · Computer Science 2023-03-01 Gorka Abad , Servio Paguada , Oguzhan Ersoy , Stjepan Picek , Víctor Julio Ramírez-Durán , Aitor Urbieta

The success of deep learning has enabled advances in multimodal tasks that require non-trivial fusion of multiple input domains. Although multimodal models have shown potential in many problems, their increased complexity makes them more…

Computer Vision and Pattern Recognition · Computer Science 2022-04-20 Matthew Walmer , Karan Sikka , Indranil Sur , Abhinav Shrivastava , Susmit Jha

Recent researches show that deep learning model is susceptible to backdoor attacks. Many defenses against backdoor attacks have been proposed. However, existing defense works require high computational overhead or backdoor attack…

Computer Vision and Pattern Recognition · Computer Science 2023-05-26 Mingfu Xue , Yinghao Wu , Zhiyu Wu , Yushu Zhang , Jian Wang , Weiqiang Liu

Federated learning (FL) is vulnerable to backdoor attacks, where adversaries alter model behavior on target classification labels by embedding triggers into data samples. While these attacks have received considerable attention in…

This paper investigates backdoor attack planning in stochastic control systems modeled as Markov Decision Processes (MDPs). A backdoor attack involves an adversary deploying a policy that performs well in the original MDP to pass testing,…

Systems and Control · Electrical Eng. & Systems 2026-04-27 Xinyi Wei , Shuo Han , Ahmed H. Hemida , Charles A. Kamhoua , Jie Fu