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While large code language models have made significant strides in AI-assisted coding tasks, there are growing concerns about privacy challenges. The user code is transparent to the cloud LLM service provider, inducing risks of unauthorized…

Computation and Language · Computer Science 2024-10-10 Yalan Lin , Chengcheng Wan , Yixiong Fang , Xiaodong Gu

Latent Dirichlet Allocation (LDA) is a popular topic modeling technique for discovery of hidden semantic architecture of text datasets, and plays a fundamental role in many machine learning applications. However, like many other machine…

Machine Learning · Computer Science 2019-07-02 Fangyuan Zhao , Xuebin Ren , Shusen Yang , Xinyu Yang

The popularity of large language models (LLMs) continues to grow, and LLM-based assistants have become ubiquitous. Information security awareness (ISA) is an important yet underexplored area of LLM safety. ISA encompasses LLMs' security…

Cryptography and Security · Computer Science 2026-03-23 Ofir Cohen , Gil Ari Agmon , Asaf Shabtai , Rami Puzis

In the evolving landscape of human-centric systems, personalized privacy solutions are becoming increasingly crucial due to the dynamic nature of human interactions. Traditional static privacy models often fail to meet the diverse and…

Machine Learning · Computer Science 2024-11-14 Mojtaba Taherisadr , Salma Elmalaki

Recently, large language models (LLMs) have emerged as a notable field, attracting significant attention for its ability to automatically generate intelligent contents for various application domains. However, LLMs still suffer from…

Cryptography and Security · Computer Science 2024-04-29 Kongyang Chen , Zixin Wang , Bing Mi , Waixi Liu , Shaowei Wang , Xiaojun Ren , Jiaxing Shen

Retrieval-Augmented Generation (RAG) has become a foundational component of modern AI systems, yet it introduces significant privacy risks by exposing user queries to service providers. To address this, we introduce PIR-RAG, a practical…

Information Retrieval · Computer Science 2025-09-29 Baiqiang Wang , Qian Lou , Mengxin Zheng , Dongfang Zhao

LLM agents have begun to appear as personal assistants, customer service bots, and clinical aides. While these applications deliver substantial operational benefits, they also require continuous access to sensitive data, which increases the…

Cryptography and Security · Computer Science 2025-09-30 Saswat Das , Jameson Sandler , Ferdinando Fioretto

AI creates and exacerbates privacy risks, yet practitioners lack effective resources to identify and mitigate these risks. We present Privy, a tool that guides practitioners without privacy expertise through structured privacy impact…

In modern times, people have numerous online accounts, but they rarely read the Terms of Service or Privacy Policy of those sites, despite claiming otherwise, due to the practical difficulty in comprehending them. The mist of data privacy…

Artificial Intelligence · Computer Science 2025-09-03 Rui Zhao , Vladyslav Melnychuk , Jun Zhao , Jesse Wright , Nigel Shadbolt

The rapid development of large language models (LLMs) is redefining the landscape of human-computer interaction, and their integration into various user-service applications is becoming increasingly prevalent. However, transmitting user…

Computation and Language · Computer Science 2025-02-20 Guangwei Li , Yuansen Zhang , Yinggui Wang , Shoumeng Yan , Lei Wang , Tao Wei

Retrieval-Augmented Generation (RAG) is an emerging approach in natural language processing that combines large language models (LLMs) with external document retrieval to produce more accurate and grounded responses. While RAG has shown…

Cryptography and Security · Computer Science 2025-09-25 Atousa Arzanipour , Rouzbeh Behnia , Reza Ebrahimi , Kaushik Dutta

Modern Vision-Language Models (VLMs) pose significant individual-level privacy risks by linking fragmented multimodal data to identifiable individuals through hierarchical chain-of-thought reasoning. However, existing privacy benchmarks…

Computer Vision and Pattern Recognition · Computer Science 2026-02-05 Xiongtao Sun , Hui Li , Jiaming Zhang , Yujie Yang , Kaili Liu , Ruxin Feng , Wen Jun Tan , Wei Yang Bryan Lim

As on-device large language model (LLM) systems become increasingly prevalent, federated fine-tuning enables advanced language understanding and generation directly on edge devices; however, it also involves processing sensitive,…

Cryptography and Security · Computer Science 2025-09-12 Honghui Xu , Shiva Shrestha , Wei Chen , Zhiyuan Li , Zhipeng Cai

In the past decade analysis of big data has proven to be extremely valuable in many contexts. Local Differential Privacy (LDP) is a state-of-the-art approach which allows statistical computations while protecting each individual user's…

Cryptography and Security · Computer Science 2019-07-30 Björn Bebensee

Fine-tuning large language models (LLMs) raises privacy concerns due to the risk of exposing sensitive training data. Federated learning (FL) mitigates this risk by keeping training samples on local devices, while facing the following…

Cryptography and Security · Computer Science 2025-05-15 Zhichao You , Xuewen Dong , Ke Cheng , Xutong Mu , Jiaxuan Fu , Shiyang Ma , Qiang Qu , Yulong Shen

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

The emergence of Multimodal Large Language Models (MLLMs) and the widespread usage of MLLM cloud services such as GPT-4V raised great concerns about privacy leakage in visual data. As these models are typically deployed in cloud services,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Xiaofei Hui , Qian Wu , Haoxuan Qu , Majid Mirmehdi , Hossein Rahmani , Jun Liu

Large Language Models (LLMs) have demonstrated impressive success across various tasks. Integrating LLMs with Federated Learning (FL), a paradigm known as FedLLM, offers a promising avenue for collaborative model adaptation while preserving…

Machine Learning · Computer Science 2026-02-25 Yebo Wu , Chunlin Tian , Jingguang Li , He Sun , Kahou Tam , Zhanting Zhou , Haicheng Liao , Jing Xiong , Zhijiang Guo , Li Li , Chengzhong Xu

The widespread adoption of AI assistants has prompted the development of privacy-aware platforms designed to extract insights from real-world usage. Their privacy protections primarily rely on layering multiple heuristic techniques, such as…

Cryptography and Security · Computer Science 2026-05-28 Meenatchi Sundaram Muthu Selva Annamalai , Emiliano De Cristofaro , Peter Kairouz

The emergence and evolution of Local Differential Privacy (LDP) and its various adaptations play a pivotal role in tackling privacy issues related to the vast amounts of data generated by intelligent devices, which are crucial for…

Cryptography and Security · Computer Science 2024-01-26 Likun Qin , Tianshuo Qiu