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Large language models (LLMs) have revolutionized how we interact with machines. However, this technological advancement has been paralleled by the emergence of "Mallas," malicious services operating underground that exploit LLMs for…

Computation and Language · Computer Science 2024-08-12 Garrett Crumrine , Izzat Alsmadi , Jesus Guerrero , Yuvaraj Munian

Parameter-efficient fine-tuning (PEFT) can bridge the gap between large language models (LLMs) and downstream tasks. However, PEFT has been proven vulnerable to malicious attacks. Research indicates that poisoned LLMs, even after PEFT,…

Computation and Language · Computer Science 2025-05-21 Shuai Zhao , Xiaobao Wu , Cong-Duy Nguyen , Yanhao Jia , Meihuizi Jia , Yichao Feng , Luu Anh Tuan

Graph data contains rich node features and unique edge information, which have been applied across various domains, such as citation networks or recommendation systems. Graph Neural Networks (GNNs) are specialized for handling such data and…

Machine Learning · Computer Science 2024-06-26 Faqian Guan , Tianqing Zhu , Hui Sun , Wanlei Zhou , Philip S. Yu

Large Language Models (LLMs) excel in general tasks, but adapting them to specialized domains relies on high-quality supervised fine-tuning (SFT) data. Although existing methods can identify subsets of high-quality data and reduce training…

Computation and Language · Computer Science 2025-10-17 Zhaoyang Shang , Sibo Wei , Jianbin Guo , Rui Zhou , Lifeng Dong , Yin Luo

As large language models (LLMs) continue to grow in capability, so do the risks of harmful misuse through fine-tuning. While most prior studies assume that attackers rely on supervised fine-tuning (SFT) for such misuse, we systematically…

Machine Learning · Computer Science 2026-05-12 Weitao Feng , Lixu Wang , Peizhuo Lv , Tianyi Wei , Jie Zhang , Chongyang Gao , Sinong Zhan , Wei Dong

Local fine-tuning datasets routinely contain sensitive secrets such as API keys, personal identifiers, and financial records. Although ''local offline fine-tuning'' is often viewed as a privacy boundary, we reveal that compromised model…

Cryptography and Security · Computer Science 2026-05-01 Zi Li , Tian Zhou , Wenze Li , Jingyu Hua , Yunlong Mao , Sheng Zhong

Despite efforts to align large language models (LLMs) with human intentions, widely-used LLMs such as GPT, Llama, and Claude are susceptible to jailbreaking attacks, wherein an adversary fools a targeted LLM into generating objectionable…

Machine Learning · Computer Science 2024-06-17 Alexander Robey , Eric Wong , Hamed Hassani , George J. Pappas

Large language models (LLMs) are increasingly deployed in high-stakes domains, yet a unified treatment of their overlapping safety challenges remains lacking. We present SafeLM, a framework that jointly addresses four pillars of LLM safety:…

Cryptography and Security · Computer Science 2026-04-21 Noor Islam S. Mohammad , Uluğ Bayazıt

Recent research has shown that Large Language Models (LLMs) are vulnerable to automated jailbreak attacks, where adversarial suffixes crafted by algorithms appended to harmful queries bypass safety alignment and trigger unintended…

Computation and Language · Computer Science 2025-11-10 Chung-En Sun , Xiaodong Liu , Weiwei Yang , Tsui-Wei Weng , Hao Cheng , Aidan San , Michel Galley , Jianfeng Gao

Trusted Execution Environments (TEE) are used to safeguard on-device models. However, directly employing TEEs to secure the entire DNN model is challenging due to the limited computational speed. Utilizing GPU can accelerate DNN's…

Cryptography and Security · Computer Science 2024-11-18 Ding Li , Ziqi Zhang , Mengyu Yao , Yifeng Cai , Yao Guo , Xiangqun Chen

Open-source large language models (LLMs) have become increasingly popular among both the general public and industry, as they can be customized, fine-tuned, and freely used. However, some open-source LLMs require approval before usage,…

Cryptography and Security · Computer Science 2024-07-04 Ziqing Yang , Michael Backes , Yang Zhang , Ahmed Salem

Fine-tuning large language models (LLMs) for downstream tasks has become increasingly crucial due to their widespread use and the growing availability of open-source models. However, the high memory costs associated with fine-tuning remain…

Machine Learning · Computer Science 2025-02-04 David H. Yang , Mohammad Mohammadi Amiri , Tejaswini Pedapati , Subhajit Chaudhury , Pin-Yu Chen

To effectively deploy Large Language Models (LLMs) in application-specific settings, fine-tuning techniques are applied to enhance performance on specialized tasks. This process often involves fine-tuning on user data data, which may…

Cryptography and Security · Computer Science 2025-04-02 Ryan Marinelli , Magnus Eckhoff

Large language models (LLMs) are sophisticated artificial intelligence systems that enable machines to generate human-like text with remarkable precision. While LLMs offer significant technological progress, their development using vast…

Cryptography and Security · Computer Science 2025-06-23 Yashothara Shanmugarasa , Ming Ding , M. A. P Chamikara , Thierry Rakotoarivelo

Previous work has shown that Large Language Models are susceptible to so-called data extraction attacks. This allows an attacker to extract a sample that was contained in the training data, which has massive privacy implications. The…

Computation and Language · Computer Science 2023-02-16 Ali Al-Kaswan , Maliheh Izadi , Arie van Deursen

With the widespread adoption of Large Language Models (LLMs), jailbreak attacks have become an increasingly pressing safety concern. While safety-aligned LLMs can effectively defend against normal harmful queries, they remain vulnerable to…

Computation and Language · Computer Science 2025-04-21 Yu Li , Han Jiang , Zhihua Wei

Prompt injection attacks are an emerging threat to large language models (LLMs), enabling malicious users to manipulate outputs through carefully designed inputs. Existing detection approaches often require centralizing prompt data,…

Cryptography and Security · Computer Science 2025-11-18 Hasini Jayathilaka

Safe exploration is a key to applying reinforcement learning (RL) in safety-critical systems. Existing safe exploration methods guaranteed safety under the assumption of regularity, and it has been difficult to apply them to large-scale…

Machine Learning · Computer Science 2021-11-10 Akifumi Wachi , Yunyue Wei , Yanan Sui

Current text generation models are trained using real data which can potentially contain sensitive information, such as confidential patient information and the like. Under certain conditions output of the training data which they have…

Computation and Language · Computer Science 2024-05-01 Mariia Ignashina , Julia Ive

Large language models (LLMs) are complex artificial intelligence systems capable of understanding, generating and translating human language. They learn language patterns by analyzing large amounts of text data, allowing them to perform…

Cryptography and Security · Computer Science 2024-03-15 Biwei Yan , Kun Li , Minghui Xu , Yueyan Dong , Yue Zhang , Zhaochun Ren , Xiuzhen Cheng
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