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The increasing adoption of Cloud-based Large Language Models (CLLMs) has raised significant concerns regarding data privacy during user interactions. While existing approaches primarily focus on encrypting sensitive information, they often…

Cryptography and Security · Computer Science 2025-08-05 Dong Chen , Tong Yang , Feipeng Zhai , Pengpeng Ouyang , Qidong Liu , Yafei Li , Chong Fu , Mingliang Xu

As large language models (LLMs) continue to grow in size, fewer users are able to host and run models locally. This has led to increased use of third-party hosting services. However, in this setting, there is a lack of guarantees on the…

Cryptography and Security · Computer Science 2026-02-20 Arka Pal , Louai Zahran , William Gvozdjak , Akilesh Potti , Micah Goldblum

Large language models (LLMs) have demonstrated remarkable performance, yet their diverse strengths and weaknesses prevent any single LLM from achieving dominance across all tasks. Ensembling multiple LLMs is a promising approach to generate…

Computation and Language · Computer Science 2025-03-17 Jiaxin Zhang , Zhuohang Li , Wendi Cui , Kamalika Das , Bradley malin , Sricharan Kumar

Machine Learning (ML) is making its way into fields such as healthcare, finance, and Natural Language Processing (NLP), and concerns over data privacy and model confidentiality continue to grow. Privacy-preserving Machine Learning (PPML)…

Cryptography and Security · Computer Science 2025-10-10 Kalyan Cheerla , Lotfi Ben Othmane , Kirill Morozov

With the growing use of large language models (LLMs) hosted on cloud platforms to offer inference services, privacy concerns about the potential leakage of sensitive information are escalating. Secure multi-party computation (MPC) is a…

Cryptography and Security · Computer Science 2025-05-13 Guang Yan , Yuhui Zhang , Zimu Guo , Lutan Zhao , Xiaojun Chen , Chen Wang , Wenhao Wang , Dan Meng , Rui Hou

Large language models (LLMs) are excellent in-context learners. However, the sensitivity of data contained in prompts raises privacy concerns. Our work first shows that these concerns are valid: we instantiate a simple but highly effective…

Machine Learning · Computer Science 2023-05-26 Haonan Duan , Adam Dziedzic , Nicolas Papernot , Franziska Boenisch

Despite Federated Learning (FL) employing gradient aggregation at the server for distributed training to prevent the privacy leakage of raw data, private information can still be divulged through the analysis of uploaded gradients from…

Machine Learning · Computer Science 2025-05-09 Tianzhe Xiao , Yichen Li , Yu Zhou , Yining Qi , Yi Liu , Wei Wang , Haozhao Wang , Yi Wang , Ruixuan Li

In statistical learning and analysis from shared data, which is increasingly widely adopted in platforms such as federated learning and meta-learning, there are two major concerns: privacy and robustness. Each participating individual…

Machine Learning · Computer Science 2021-11-25 Xiyang Liu , Weihao Kong , Sham Kakade , Sewoong Oh

Transformer inference in machine-learning-as-a-service (MLaaS) raises privacy concerns for sensitive user inputs. Prior secure solutions that combine fully homomorphic encryption (FHE) and secure multiparty computation (MPC) are…

Cryptography and Security · Computer Science 2026-04-14 Yufan Zhu , Chao Jin , Khin Mi Mi Aung , Xiaokui Xiao

The emergence of ChatGPT marks the arrival of the large language model (LLM) era. While LLMs demonstrate their power in a variety of fields, they also raise serious privacy concerns as the users' queries are sent to the model provider. On…

Cryptography and Security · Computer Science 2024-05-30 Fei Zheng , Chaochao Chen , Zhongxuan Han , Xiaolin Zheng

In this paper, we propose a new secure machine learning inference platform assisted by a small dedicated security processor, which will be easier to protect and deploy compared to today's TEEs integrated into high-performance processors.…

Cryptography and Security · Computer Science 2024-10-30 Pengzhi Huang , Thang Hoang , Yueying Li , Elaine Shi , G. Edward Suh

Secure aggregation (SecAgg) is a commonly-used privacy-enhancing mechanism in federated learning, affording the server access only to the aggregate of model updates while safeguarding the confidentiality of individual updates. Despite…

Machine Learning · Computer Science 2024-07-16 Khac-Hoang Ngo , Johan Östman , Giuseppe Durisi , Alexandre Graell i Amat

Secure inference enables privacy-preserving machine learning by leveraging cryptographic protocols that support computations on sensitive user data without exposing it. However, integrating cryptographic protocols with large language models…

Cryptography and Security · Computer Science 2025-09-12 Zhiyu He , Maojiang Wang , Xinwen Gao , Yuchuan Luo , Lin Liu , Shaojing Fu

CPU-based trusted execution environments (TEEs) and differential privacy (DP) have gained wide applications for private inference. Due to high inference latency in TEEs, researchers use partition-based approaches that offload linear model…

Cryptography and Security · Computer Science 2025-09-12 Honglan Yu , Yibin Wang , Feifei Dai , Dong Liu , Haihui Fan , Xiaoyan Gu

The system prompt in Large Language Models (LLMs) plays a pivotal role in guiding model behavior and response generation. Often containing private configuration details, user roles, and operational instructions, the system prompt has become…

Cryptography and Security · Computer Science 2025-06-02 Badhan Chandra Das , M. Hadi Amini , Yanzhao Wu

Large Language Models (LLMs) have shown remarkable potential in code generation, making them increasingly important in the field. However, the security issues of generated code have not been fully addressed, and the usability of LLMs in…

Cryptography and Security · Computer Science 2024-10-21 Shigang Liu , Bushra Sabir , Seung Ick Jang , Yuval Kansal , Yansong Gao , Kristen Moore , Alsharif Abuadbba , Surya Nepal

Privacy protection has become an increasing concern in modern machine learning applications. Privacy-preserving machine learning (PPML) has attracted growing research attention, with approaches such as secure multiparty computation (MPC)…

Cryptography and Security · Computer Science 2026-04-22 Pengzhi Huang , Kiwan Maeng , G. Edward Suh

Federated learning is a method used in machine learning to allow multiple devices to work together on a model without sharing their private data. Each participant keeps their private data on their system and trains a local model and only…

Cryptography and Security · Computer Science 2025-04-07 Feiran Yang

Privacy-preserving machine learning (PPML) is an emerging topic to handle secure machine learning inference over sensitive data in untrusted environments. Fully homomorphic encryption (FHE) enables computation directly on encrypted data on…

Cryptography and Security · Computer Science 2025-10-24 Yu Hin Chan , Hao Yang , Shiyu Shen , Xingyu Fan , Shengzhe Lyu , Patrick S. Y. Hung , Ray C. C. Cheung

With the rapid surge in the prevalence of Large Language Models (LLMs), individuals are increasingly turning to conversational AI for initial insights across various domains, including health-related inquiries such as disease diagnosis.…

Cryptography and Security · Computer Science 2024-05-07 Aditya Malik , Nalini Ratha , Bharat Yalavarthi , Tilak Sharma , Arjun Kaushik , Charanjit Jutla