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Pre-trained language models (PTLMs) have achieved great success and remarkable performance over a wide range of natural language processing (NLP) tasks. However, there are also growing concerns regarding the potential security issues in the…

Cryptography and Security · Computer Science 2022-02-15 Shangwei Guo , Chunlong Xie , Jiwei Li , Lingjuan Lyu , Tianwei Zhang

The collection and availability of big data, combined with advances in pre-trained models (e.g. BERT), have revolutionized the predictive performance of natural language processing tasks. This allows corporations to provide machine learning…

Cryptography and Security · Computer Science 2022-11-01 Xuanli He , Chen Chen , Lingjuan Lyu , Qiongkai Xu

Fine-tuning large language models on private data for downstream applications poses significant privacy risks in potentially exposing sensitive information. Several popular community platforms now offer convenient distribution of a large…

Machine Learning · Computer Science 2024-09-02 Md Rafi Ur Rashid , Jing Liu , Toshiaki Koike-Akino , Shagufta Mehnaz , Ye Wang

The pre-training and fine-tuning paradigm has demonstrated its effectiveness and has become the standard approach for tailoring language models to various tasks. Currently, community-based platforms offer easy access to various pre-trained…

Cryptography and Security · Computer Science 2024-09-17 Ruixuan Liu , Tianhao Wang , Yang Cao , Li Xiong

Goal hijacking is a type of adversarial attack on Large Language Models (LLMs) where the objective is to manipulate the model into producing a specific, predetermined output, regardless of the user's original input. In goal hijacking, an…

Computation and Language · Computer Science 2026-03-12 Zheng Chen , Buhui Yao

Natural language processing models have experienced a significant upsurge in recent years, with numerous applications being built upon them. Many of these applications require fine-tuning generic base models on customized, proprietary…

Machine Learning · Computer Science 2024-03-14 Guy Amit , Abigail Goldsteen , Ariel Farkash

In the rapidly evolving landscape of artificial intelligence, ChatGPT has been widely used in various applications. The new feature - customization of ChatGPT models by users to cater to specific needs has opened new frontiers in AI…

Cryptography and Security · Computer Science 2024-05-28 Jiahao Yu , Yuhang Wu , Dong Shu , Mingyu Jin , Sabrina Yang , Xinyu Xing

Past work has shown that large language models are susceptible to privacy attacks, where adversaries generate sequences from a trained model and detect which sequences are memorized from the training set. In this work, we show that the…

Cryptography and Security · Computer Science 2022-12-21 Nikhil Kandpal , Eric Wallace , Colin Raffel

Federated Learning (FL) enables collaborative training of machine learning models across distributed clients without sharing raw data, ostensibly preserving data privacy. Nevertheless, recent studies have revealed critical vulnerabilities…

Machine Learning · Computer Science 2025-09-08 Francesco Diana , André Nusser , Chuan Xu , Giovanni Neglia

Large Language Models (LLMs) have achieved remarkable progress in natural language understanding, reasoning, and autonomous decision-making. However, these advancements have also come with significant privacy concerns. While significant…

Cryptography and Security · Computer Science 2026-01-27 Yuntao Du , Zitao Li , Ninghui Li , Bolin Ding

Recent research shows that large language models are susceptible to privacy attacks that infer aspects of the training data. However, it is unclear if simpler generative models, like topic models, share similar vulnerabilities. In this…

Cryptography and Security · Computer Science 2024-09-24 Nico Manzonelli , Wanrong Zhang , Salil Vadhan

Language models trained via federated learning (FL) demonstrate impressive capabilities in handling complex tasks while protecting user privacy. Recent studies indicate that leveraging gradient information and prior knowledge can…

Machine Learning · Computer Science 2024-03-19 Jianwei Li , Sheng Liu , Qi Lei

Deep learning has attracted broad interest in healthcare and medical communities. However, there has been little research into the privacy issues created by deep networks trained for medical applications. Recently developed inference attack…

Machine Learning · Computer Science 2020-11-03 Maoqiang Wu , Xinyue Zhang , Jiahao Ding , Hien Nguyen , Rong Yu , Miao Pan , Stephen T. Wong

Although powerful graph neural networks (GNNs) have boosted numerous real-world applications, the potential privacy risk is still underexplored. To close this gap, we perform the first comprehensive study of graph reconstruction attack that…

Machine Learning · Computer Science 2023-06-16 Zhanke Zhou , Chenyu Zhou , Xuan Li , Jiangchao Yao , Quanming Yao , Bo Han

Federated learning has emerged as a prominent privacy-preserving technique for leveraging large-scale distributed datasets by sharing gradients instead of raw data. However, recent studies indicate that private training data can still be…

Cryptography and Security · Computer Science 2025-09-30 Tamer Ahmed Eltaras , Qutaibah Malluhi , Alessandro Savino , Stefano Di Carlo , Adnan Qayyum

The rapid evolution of LLMs represents an impactful paradigm shift in digital interaction and content engagement. While they encode vast amounts of human-generated knowledge and excel in processing diverse data types, they often face the…

Human-Computer Interaction · Computer Science 2024-11-20 Anna Bodonhelyi , Efe Bozkir , Shuo Yang , Enkelejda Kasneci , Gjergji Kasneci

Extended interaction with large language models (LLMs) has been linked to the reinforcement of delusional beliefs, a phenomenon attracting growing clinical and public concern. Yet most empirical work evaluates model safety in brief…

Human-Computer Interaction · Computer Science 2026-04-24 Luke Nicholls , Robert Hutto , Zephrah Soto , Hamilton Morrin , Thomas Pollak , Raj Korpan , Cheryl Carmichael

The inference process of modern large language models (LLMs) demands prohibitive computational resources, rendering them infeasible for deployment on consumer-grade devices. To address this limitation, recent studies propose distributed LLM…

Cryptography and Security · Computer Science 2025-05-26 Xinjian Luo , Ting Yu , Xiaokui Xiao

Data reconstruction attacks on machine learning models pose a substantial threat to privacy, potentially leaking sensitive information. Although defending against such attacks using differential privacy (DP) provides theoretical guarantees,…

Machine Learning · Computer Science 2025-03-11 Kristian Schwethelm , Johannes Kaiser , Moritz Knolle , Sarah Lockfisch , Daniel Rueckert , Alexander Ziller

Generative Pre-trained Transformer 4 (GPT-4) is the fourth-generation language model in the GPT series, developed by OpenAI, which promises significant advancements in the field of natural language processing (NLP). In this research…

Computation and Language · Computer Science 2023-05-08 Jawid Ahmad Baktash , Mursal Dawodi