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Large visual language models (LVLMs) have demonstrated excellent instruction-following capabilities, yet remain vulnerable to stealthy backdoor attacks when finetuned using contaminated data. Existing backdoor defense techniques are usually…

Cryptography and Security · Computer Science 2025-06-09 Yuan Xun , Siyuan Liang , Xiaojun Jia , Xinwei Liu , Xiaochun Cao

A reconstruction attack on a private dataset $D$ takes as input some publicly accessible information about the dataset and produces a list of candidate elements of $D$. We introduce a new class of data reconstruction attacks based on…

Computers and Society · Computer Science 2023-03-29 Travis Dick , Cynthia Dwork , Michael Kearns , Terrance Liu , Aaron Roth , Giuseppe Vietri , Zhiwei Steven Wu

These days, deep learning models have achieved great success in multiple fields, from autonomous driving to medical diagnosis. These models have expanded the abilities of artificial intelligence by offering great solutions to complex…

Cryptography and Security · Computer Science 2023-11-27 Gopichandh Golla

Model Inversion (MI) attacks aim at leveraging the output information of target models to reconstruct privacy-sensitive training data, raising critical concerns regarding the privacy vulnerabilities of Deep Neural Networks (DNNs).…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Yixiang Qiu , Hongyao Yu , Hao Fang , Tianqu Zhuang , Wenbo Yu , Bin Chen , Xuan Wang , Shu-Tao Xia , Ke Xu

Large language models (LLMs) can leak sensitive training data through memorization and membership inference attacks. Prior work has primarily focused on strong adversarial assumptions, including attacker access to entire samples or long,…

Machine Learning · Computer Science 2025-05-21 Lucas Rosenblatt , Bin Han , Robert Wolfe , Bill Howe

Large Language Models are typically trained on datasets collected from the web, which may inadvertently contain harmful or sensitive personal information. To address growing privacy concerns, unlearning methods have been proposed to remove…

Machine Learning · Computer Science 2025-10-23 Xiaoyu Wu , Yifei Pang , Terrance Liu , Zhiwei Steven Wu

As machine learning becomes more widely used for critical applications, the need to study its implications in privacy turns to be urgent. Given access to the target model and auxiliary information, the model inversion attack aims to infer…

Machine Learning · Computer Science 2021-06-08 Zaixi Zhang , Qi Liu , Zhenya Huang , Hao Wang , Chengqiang Lu , Chuanren Liu , Enhong Chen

Deep neural networks (DNNs) have long been recognized as vulnerable to backdoor attacks. By providing poisoned training data in the fine-tuning process, the attacker can implant a backdoor into the victim model. This enables input samples…

Cryptography and Security · Computer Science 2024-09-10 Abdullah Arafat Miah , Yu Bi

Model Inversion attacks aim to reconstruct information from private training data by exploiting access to a target model. Nearly all recent MI studies evaluate attack success using a standard framework that computes attack accuracy through…

Machine Learning · Computer Science 2026-05-15 Sy-Tuyen Ho , Koh Jun Hao , Ngoc-Bao Nguyen , Alexander Binder , Ngai-Man Cheung

Backdoor attacks on deep neural networks (DNNs) have emerged as a significant security threat, allowing adversaries to implant hidden malicious behaviors during the model training phase. Pre-processing-based defense, which is one of the…

Cryptography and Security · Computer Science 2025-02-27 Yukun Chen , Shuo Shao , Enhao Huang , Yiming Li , Pin-Yu Chen , Zhan Qin , Kui Ren

The concept of learned index structures relies on the idea that the input-output functionality of a database index can be viewed as a prediction task and, thus, be implemented using a machine learning model instead of traditional…

Cryptography and Security · Computer Science 2022-03-01 Evgenios M. Kornaropoulos , Silei Ren , Roberto Tamassia

Large language models (LLMs) have achieved remarkable success and are widely adopted for diverse applications. However, fine-tuning these models often involves private or sensitive information, raising critical privacy concerns. In this…

Cryptography and Security · Computer Science 2025-06-13 Kaiyuan Zhang , Siyuan Cheng , Hanxi Guo , Yuetian Chen , Zian Su , Shengwei An , Yuntao Du , Charles Fleming , Ashish Kundu , Xiangyu Zhang , Ninghui Li

The reconstruction of shredded documents consists of coherently arranging fragments of paper (shreds) to recover the original document(s). A great challenge in computational reconstruction is to properly evaluate the compatibility between…

Computer Vision and Pattern Recognition · Computer Science 2020-07-03 Thiago M. Paixão , Rodrigo F. Berriel , Maria C. S. Boeres , Alessandro L. Koerich , Claudine Badue , Alberto F. de Souza , Thiago Oliveira-Santos

Supervised Finetuning (SFT) has become one of the primary methods for adapting a large language model (LLM) with extensive pre-trained knowledge to domain-specific, instruction-following tasks. SFT datasets, composed of instruction-response…

Cryptography and Security · Computer Science 2026-05-13 Sae Furukawa , Alina Oprea

Large Language Models (LLMs) have become a cornerstone in the field of Natural Language Processing (NLP), offering transformative capabilities in understanding and generating human-like text. However, with their rising prominence, the…

Cryptography and Security · Computer Science 2024-03-26 Arijit Ghosh Chowdhury , Md Mofijul Islam , Vaibhav Kumar , Faysal Hossain Shezan , Vaibhav Kumar , Vinija Jain , Aman Chadha

Large language models (LLMs) are inherently vulnerable to unintended privacy breaches. Consequently, systematic red-teaming research is essential for developing robust defense mechanisms. However, current data extraction methods suffer from…

Machine Learning · Computer Science 2025-05-13 Zhiqiang Wang , Ruoxi Cheng

Successful Artificial Intelligence systems often require numerous labeled data to extract information from document images. In this paper, we investigate the problem of improving the performance of Artificial Intelligence systems in…

Information Retrieval · Computer Science 2022-09-27 Bao-Sinh Nguyen , Dung Tien Le , Hieu M. Vu , Tuan Anh D. Nguyen , Minh-Tien Nguyen , Hung Le

Fine-tuning on open-source Large Language Models (LLMs) with proprietary data is now a standard practice for downstream developers to obtain task-specific LLMs. Surprisingly, we reveal a new and concerning risk along with the practice: the…

Computation and Language · Computer Science 2026-04-06 Zhexin Zhang , Yuhao Sun , Junxiao Yang , Shiyao Cui , Yuanchao Zhang , Hongning Wang , Minlie Huang

We analyze the number of queries that a whitebox adversary needs to make to a private learner in order to reconstruct its training data. For $(\epsilon, \delta)$ DP learners with training data drawn from any arbitrary compact metric space,…

Machine Learning · Computer Science 2024-01-15 Prateeti Mukherjee , Satya Lokam

Enterprise documents such as forms, invoices, receipts, reports, contracts, and other similar records, often carry rich semantics at the intersection of textual and spatial modalities. The visual cues offered by their complex layouts play a…

Computation and Language · Computer Science 2024-01-03 Dongsheng Wang , Natraj Raman , Mathieu Sibue , Zhiqiang Ma , Petr Babkin , Simerjot Kaur , Yulong Pei , Armineh Nourbakhsh , Xiaomo Liu