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This paper studies model-inversion attacks, in which the access to a model is abused to infer information about the training data. Since its first introduction, such attacks have raised serious concerns given that training data usually…

Machine Learning · Computer Science 2020-04-21 Yuheng Zhang , Ruoxi Jia , Hengzhi Pei , Wenxiao Wang , Bo Li , Dawn Song

As large language models (LLMs) are increasingly deployed in critical applications, ensuring their robustness and safety alignment remains a major challenge. Despite the overall success of alignment techniques such as reinforcement learning…

Machine Learning · Computer Science 2025-08-21 Sajib Biswas , Mao Nishino , Samuel Jacob Chacko , Xiuwen Liu

Generative Adversarial Networks (GAN) is a model for data synthesis, which creates plausible data through the competition of generator and discriminator. Although GAN application to image synthesis is extensively studied, it has inherent…

Computation and Language · Computer Science 2025-01-07 Jun-Min Lee , Tae-Bin Ha

We introduce a novel inference-time alignment approach for LLMs that aims to generate safe responses almost surely, i.e., with probability approaching one. Our approach models the generation of safe responses as a constrained Markov…

Machine Learning · Computer Science 2025-06-23 Xiaotong Ji , Shyam Sundhar Ramesh , Matthieu Zimmer , Ilija Bogunovic , Jun Wang , Haitham Bou Ammar

Large Language Models (LLMs) are widely deployed in diverse real-world settings, yet remain vulnerable to jailbreaking, where prompt-based attacks bypass safety filters. We present THREAT (Targeted Harmful generation via Reframing and…

Cryptography and Security · Computer Science 2026-05-22 Shahnewaz Karim Sakib , Swati Kar , Anindya Bijoy Das

Deep learning based systems are susceptible to adversarial attacks, where a small, imperceptible change at the input alters the model prediction. However, to date the majority of the approaches to detect these attacks have been designed for…

Computation and Language · Computer Science 2022-09-27 Vyas Raina , Mark Gales

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

Despite the remarkable generation capabilities of diffusion models, recent studies have shown that they can memorize and create harmful content when given specific text prompts. Although fine-tuning approaches have been developed to…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Siyi Chen , Yimeng Zhang , Sijia Liu , Qing Qu

This study investigates the privacy risks associated with text embeddings, focusing on the scenario where attackers cannot access the original embedding model. Contrary to previous research requiring direct model access, we explore a more…

Cryptography and Security · Computer Science 2025-01-15 Yu-Hsiang Huang , Yuche Tsai , Hsiang Hsiao , Hong-Yi Lin , Shou-De Lin

Large Language Models (LLMs) are increasingly used for cybersecurity threat analysis, but their deployment in security-sensitive environments raises trust and safety concerns. With over 21,000 vulnerabilities disclosed in 2025, manual…

Cryptography and Security · Computer Science 2025-09-04 Reza Fayyazi , Michael Zuzak , Shanchieh Jay Yang

Large Language Models (LLMs) are susceptible to malicious influence by cyber attackers through intrusions such as adversarial, backdoor, and embedding inversion attacks. In response, the burgeoning field of LLM Security aims to study and…

Computation and Language · Computer Science 2024-12-17 Yiyi Chen , Russa Biswas , Heather Lent , Johannes Bjerva

Deep learning has achieved overwhelming success, spanning from discriminative models to generative models. In particular, deep generative models have facilitated a new level of performance in a myriad of areas, ranging from media…

Machine Learning · Computer Science 2020-11-24 Dingfan Chen , Ning Yu , Yang Zhang , Mario Fritz

Large language models (LLMs) have been serving as effective backbones for retrieval systems, including Retrieval-Augmentation-Generation (RAG), Dense Information Retriever (IR), and Agent Memory Retrieval. Recent studies have demonstrated…

Cryptography and Security · Computer Science 2026-05-18 Jiate Li , Defu Cao , Li Li , Wei Yang , Yuehan Qin , Chenxiao Yu , Tiannuo Yang , Ryan A. Rossi , Yan Liu , Xiyang Hu , Yue Zhao

Adversarial attacks pose significant challenges to deep neural networks (DNNs) such as Transformer models in natural language processing (NLP). This paper introduces a novel defense strategy, called GenFighter, which enhances adversarial…

Machine Learning · Computer Science 2024-04-18 Md Athikul Islam , Edoardo Serra , Sushil Jajodia

Personalized Large Language Models (LLMs) have become increasingly prevalent, showcasing the impressive capabilities of models like GPT-4. This trend has also catalyzed extensive research on deploying LLMs on mobile devices. Feasible…

Machine Learning · Computer Science 2025-01-13 Yunmeng Shu , Shaofeng Li , Tian Dong , Yan Meng , Haojin Zhu

The rapid adoption of large language models (LLMs) has brought both transformative applications and new security risks, including jailbreak attacks that bypass alignment safeguards to elicit harmful outputs. Existing automated jailbreak…

Cryptography and Security · Computer Science 2025-11-18 Siyang Cheng , Gaotian Liu , Rui Mei , Yilin Wang , Kejia Zhang , Kaishuo Wei , Yuqi Yu , Weiping Wen , Xiaojie Wu , Junhua Liu

With the development of large language models (LLMs), detecting whether text is generated by a machine becomes increasingly challenging in the face of malicious use cases like the spread of false information, protection of intellectual…

Computation and Language · Computer Science 2024-04-03 Ying Zhou , Ben He , Le Sun

Recent work shows that sensitive user data can be reconstructed from gradient updates, breaking the key privacy promise of federated learning. While success was demonstrated primarily on image data, these methods do not directly transfer to…

Machine Learning · Computer Science 2022-10-20 Mislav Balunović , Dimitar I. Dimitrov , Nikola Jovanović , Martin Vechev

Recent studies have revealed the intriguing few-shot learning ability of pretrained language models (PLMs): They can quickly adapt to a new task when fine-tuned on a small amount of labeled data formulated as prompts, without requiring…

Computation and Language · Computer Science 2023-05-15 Yu Meng , Martin Michalski , Jiaxin Huang , Yu Zhang , Tarek Abdelzaher , Jiawei Han

This study investigates embedding reconstruction attacks in large language models (LLMs) applied to genomic sequences, with a specific focus on how fine-tuning affects vulnerability to these attacks. Building upon Pan et al.'s seminal work…

Machine Learning · Computer Science 2025-11-12 Reem Al-Saidi , Erman Ayday , Ziad Kobti