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Large language models (LLMs) have become integral to various real-world applications, leveraging massive, web-sourced datasets like Common Crawl, C4, and FineWeb for pretraining. While these datasets provide linguistic data essential for…

Computation and Language · Computer Science 2025-08-14 Sai Krishna Mendu , Harish Yenala , Aditi Gulati , Shanu Kumar , Parag Agrawal

With the rise of third parties in the machine learning pipeline, the service provider in "Machine Learning as a Service" (MLaaS), or external data contributors in online learning, or the retraining of existing models, the need to ensure the…

Cryptography and Security · Computer Science 2021-05-20 Jialin Wen , Benjamin Zi Hao Zhao , Minhui Xue , Alina Oprea , Haifeng Qian

In the evolving landscape of Federated Learning (FL), a new type of attacks concerns the research community, namely Data Poisoning Attacks, which threaten the model integrity by maliciously altering training data. This paper introduces a…

Cryptography and Security · Computer Science 2024-04-22 Nick Galanis

Test-time personalization in federated learning enables models at clients to adjust online to local domain shifts, enhancing robustness and personalization in deployment. Yet, existing federated learning work largely overlooks the security…

Cryptography and Security · Computer Science 2025-11-25 Md Akil Raihan Iftee , Syed Md. Ahnaf Hasan , Amin Ahsan Ali , AKM Mahbubur Rahman , Sajib Mistry , Aneesh Krishna

Adversarial poisoning attacks pose huge threats to various machine learning applications. Especially, the recent accumulative poisoning attacks show that it is possible to achieve irreparable harm on models via a sequence of imperceptible…

Machine Learning · Computer Science 2023-06-07 Jianing Zhu , Xiawei Guo , Jiangchao Yao , Chao Du , Li He , Shuo Yuan , Tongliang Liu , Liang Wang , Bo Han

Federated Learning (FL) is a distributed learning paradigm designed to address privacy concerns. However, FL is vulnerable to poisoning attacks, where Byzantine clients compromise the integrity of the global model by submitting malicious…

Cryptography and Security · Computer Science 2025-09-11 Ryan McGaughey , Jesus Martinez del Rincon , Ihsen Alouani

Safety aligned Large Language Models (LLMs) are vulnerable to harmful fine-tuning attacks -- a few harmful data mixed in the fine-tuning dataset can break the LLMs's safety alignment. While several defenses have been proposed, our…

Artificial Intelligence · Computer Science 2025-09-08 Tiansheng Huang , Gautam Bhattacharya , Pratik Joshi , Josh Kimball , Ling Liu

Recent studies have revealed a security threat to natural language processing (NLP) models, called the Backdoor Attack. Victim models can maintain competitive performance on clean samples while behaving abnormally on samples with a specific…

Computation and Language · Computer Science 2021-03-30 Wenkai Yang , Lei Li , Zhiyuan Zhang , Xuancheng Ren , Xu Sun , Bin He

Machine learning models trained on data from the outside world can be corrupted by data poisoning attacks that inject malicious points into the models' training sets. A common defense against these attacks is data sanitization: first filter…

Machine Learning · Statistics 2021-12-06 Pang Wei Koh , Jacob Steinhardt , Percy Liang

With the increase in machine learning (ML) applications in different domains, incentives for deceiving these models have reached more than ever. As data is the core backbone of ML algorithms, attackers shifted their interest toward…

Cryptography and Security · Computer Science 2023-01-04 Kshitiz Aryal , Maanak Gupta , Mahmoud Abdelsalam

Adversaries can embed backdoors in deep learning models by introducing backdoor poison samples into training datasets. In this work, we investigate how to detect such poison samples to mitigate the threat of backdoor attacks. First, we…

Machine Learning · Computer Science 2023-06-21 Xiangyu Qi , Tinghao Xie , Jiachen T. Wang , Tong Wu , Saeed Mahloujifar , Prateek Mittal

The emerging success of large language models (LLMs) heavily relies on collecting abundant training data from external (untrusted) sources. Despite substantial efforts devoted to data cleaning and curation, well-constructed LLMs have been…

Computation and Language · Computer Science 2024-02-26 Tianlin Li , Qian Liu , Tianyu Pang , Chao Du , Qing Guo , Yang Liu , Min Lin

Accurate identification of software vulnerabilities is crucial for system integrity. Vulnerability datasets, often derived from the National Vulnerability Database (NVD) or directly from GitHub, are essential for training machine learning…

Large language models (LLMs) have revolutionized software development practices, yet concerns about their safety have arisen, particularly regarding hidden backdoors, aka trojans. Backdoor attacks involve the insertion of triggers into…

Software Engineering · Computer Science 2024-05-21 Aftab Hussain , Md Rafiqul Islam Rabin , Mohammad Amin Alipour

Machine learning systems trained on user-provided data are susceptible to data poisoning attacks, whereby malicious users inject false training data with the aim of corrupting the learned model. While recent work has proposed a number of…

Machine Learning · Computer Science 2017-11-27 Jacob Steinhardt , Pang Wei Koh , Percy Liang

Due to their decentralized nature, federated learning (FL) systems have an inherent vulnerability during their training to adversarial backdoor attacks. In this type of attack, the goal of the attacker is to use poisoned updates to implant…

Cryptography and Security · Computer Science 2022-06-22 Zhengming Zhang , Ashwinee Panda , Linyue Song , Yaoqing Yang , Michael W. Mahoney , Joseph E. Gonzalez , Kannan Ramchandran , Prateek Mittal

Large Language Models (LLMs) have become foundational in modern artificial intelligence, powering a wide range of applications from code generation and virtual assistants to scientific research and enterprise automation. However, concerns…

Machine Learning · Computer Science 2025-05-20 Le Vu Anh , Dinh Duc Nha Nguyen , Phi Long Nguyen

Adversarial data poisoning is an effective attack against machine learning and threatens model integrity by introducing poisoned data into the training dataset. So far, it has been studied mostly for classification, even though regression…

Machine Learning · Computer Science 2020-09-16 Nicolas Michael Müller , Daniel Kowatsch , Konstantin Böttinger

This paper investigates poisoning attacks against data-driven control methods. This work is motivated by recent trends showing that, in supervised learning, slightly modifying the data in a malicious manner can drastically deteriorate the…

Systems and Control · Electrical Eng. & Systems 2021-03-11 Alessio Russo , Alexandre Proutiere

When large language model (LLM) systems interact with external data to perform complex tasks, a new attack, namely prompt injection, becomes a significant threat. By injecting instructions into the data accessed by the system, the attacker…

Cryptography and Security · Computer Science 2025-08-26 Sizhe Chen , Yizhu Wang , Nicholas Carlini , Chawin Sitawarin , David Wagner