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Prompt-based learning paradigm bridges the gap between pre-training and fine-tuning, and works effectively under the few-shot setting. However, we find that this learning paradigm inherits the vulnerability from the pre-training stage,…

Computation and Language · Computer Science 2022-04-12 Lei Xu , Yangyi Chen , Ganqu Cui , Hongcheng Gao , Zhiyuan Liu

Backdoor attacks have become a critical threat to deep neural networks (DNNs), drawing many research interests. However, most of the studied attacks employ a single type of trigger. Consequently, proposed backdoor defenders often rely on…

Cryptography and Security · Computer Science 2025-01-14 Duc Anh Vu , Anh Tuan Tran , Cong Tran , Cuong Pham

Federated learning is a versatile framework for training models in decentralized environments. However, the trust placed in clients makes federated learning vulnerable to backdoor attacks launched by malicious participants. While many…

Cryptography and Security · Computer Science 2024-12-23 Borja Molina-Coronado

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…

Backdoor attacks pose a serious threat to the security of large language models (LLMs), causing them to exhibit anomalous behavior under specific trigger conditions. The design of backdoor triggers has evolved from fixed triggers to dynamic…

Cryptography and Security · Computer Science 2026-04-15 Haotian Jin , Yang Li , Haihui Fan , Lin Shen , Xiangfang Li , Bo Li

Model providers increasingly release open weights or allow users to fine-tune foundation models through APIs. Although these models are safety-aligned before release, their safeguards can often be removed by fine-tuning on harmful data.…

Cryptography and Security · Computer Science 2026-05-26 Itay Zloczower , Eyal Lenga , Gilad Gressel , Yisroel Mirsky

Recent research highlights concerns about the trustworthiness of third-party Pre-Trained Language Models (PTLMs) due to potential backdoor attacks. These backdoored PTLMs, however, are effective only for specific pre-defined downstream…

Cryptography and Security · Computer Science 2025-05-20 Rui Zhang , Yun Shen , Hongwei Li , Wenbo Jiang , Hanxiao Chen , Yuan Zhang , Guowen Xu , Yang Zhang

Although deep neural networks (DNNs) have made rapid progress in recent years, they are vulnerable in adversarial environments. A malicious backdoor could be embedded in a model by poisoning the training dataset, whose intention is to make…

Cryptography and Security · Computer Science 2021-03-25 Yinpeng Dong , Xiao Yang , Zhijie Deng , Tianyu Pang , Zihao Xiao , Hang Su , Jun Zhu

Recently, a special type of data poisoning (DP) attack targeting Deep Neural Network (DNN) classifiers, known as a backdoor, was proposed. These attacks do not seek to degrade classification accuracy, but rather to have the classifier learn…

Machine Learning · Computer Science 2020-08-20 Zhen Xiang , David J. Miller , George Kesidis

Backdoor attacks are a kind of emergent security threat in deep learning. After being injected with a backdoor, a deep neural model will behave normally on standard inputs but give adversary-specified predictions once the input contains…

Cryptography and Security · Computer Science 2022-10-20 Yangyi Chen , Fanchao Qi , Hongcheng Gao , Zhiyuan Liu , Maosong Sun

AI systems are rapidly advancing in capability, and frontier model developers broadly acknowledge the need for safeguards against serious misuse. However, this paper demonstrates that fine-tuning, whether via open weights or closed…

Cryptography and Security · Computer Science 2025-09-23 Brendan Murphy , Dillon Bowen , Shahrad Mohammadzadeh , Tom Tseng , Julius Broomfield , Adam Gleave , Kellin Pelrine

Medical foundation models are gaining prominence in the medical community for their ability to derive general representations from extensive collections of medical image-text pairs. Recent research indicates that these models are…

Computer Vision and Pattern Recognition · Computer Science 2024-08-16 Asif Hanif , Fahad Shamshad , Muhammad Awais , Muzammal Naseer , Fahad Shahbaz Khan , Karthik Nandakumar , Salman Khan , Rao Muhammad Anwer

Backdoor attacks are serious security threats to machine learning models where an adversary can inject poisoned samples into the training set, causing a backdoored model which predicts poisoned samples with particular triggers to particular…

Machine Learning · Computer Science 2023-07-21 Shaokui Wei , Mingda Zhang , Hongyuan Zha , Baoyuan Wu

Genomic foundation models trained on DNA sequences have demonstrated remarkable capabilities across diverse biological tasks, from variant effect prediction to genome design. These models are typically trained on massive, publicly sourced…

Genomics · Quantitative Biology 2026-03-31 Charalampos Koilakos , Ioannis Mouratidis , Ilias Georgakopoulos-Soares

Large Language Models (LLMs) can acquire deceptive behaviors through backdoor attacks, where the model executes prohibited actions whenever secret triggers appear in the input. Existing safety training methods largely fail to address this…

Cryptography and Security · Computer Science 2025-10-08 Guangyu Shen , Siyuan Cheng , Xiangzhe Xu , Yuan Zhou , Hanxi Guo , Zhuo Zhang , Xiangyu Zhang

Diffusion models are state-of-the-art deep learning empowered generative models that are trained based on the principle of learning forward and reverse diffusion processes via progressive noise-addition and denoising. To gain a better…

Computer Vision and Pattern Recognition · Computer Science 2023-06-12 Sheng-Yen Chou , Pin-Yu Chen , Tsung-Yi Ho

With the success of deep learning algorithms in various domains, studying adversarial attacks to secure deep models in real world applications has become an important research topic. Backdoor attacks are a form of adversarial attacks on…

Computer Vision and Pattern Recognition · Computer Science 2019-12-24 Aniruddha Saha , Akshayvarun Subramanya , Hamed Pirsiavash

Since Deep Learning (DL) backdoor attacks have been revealed as one of the most insidious adversarial attacks, a number of countermeasures have been developed with certain assumptions defined in their respective threat models. However, the…

Cryptography and Security · Computer Science 2022-04-14 Huming Qiu , Hua Ma , Zhi Zhang , Alsharif Abuadbba , Wei Kang , Anmin Fu , Yansong Gao

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

Federated learning enables training high-utility models across several clients without directly sharing their private data. As a downside, the federated setting makes the model vulnerable to various adversarial attacks in the presence of…

Machine Learning · Computer Science 2024-03-12 Xiaoyang Wang , Dimitrios Dimitriadis , Sanmi Koyejo , Shruti Tople