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Federated clustering (FC) is an essential extension of centralized clustering designed for the federated setting, wherein the challenge lies in constructing a global similarity measure without the need to share private data. Conventional…

Machine Learning · Computer Science 2023-10-24 Jie Yan , Jing Liu , Ji Qi , Zhong-Yuan Zhang

Matrix factorization (MF) mechanisms for differential privacy (DP) have substantially improved the state-of-the-art in privacy-utility-computation tradeoffs for ML applications in a variety of scenarios, but in both the centralized and…

Existing traffic flow forecasting approaches by deep learning models achieve excellent success based on a large volume of datasets gathered by governments and organizations. However, these datasets may contain lots of user's private data,…

Machine Learning · Computer Science 2020-05-04 Yi Liu , James J. Q. Yu , Jiawen Kang , Dusit Niyato , Shuyu Zhang

Sequential Convex Programming (SCP) has recently seen a surge of interest as a tool for trajectory optimization. However, most available methods lack rigorous performance guarantees and they are often tailored to specific optimal control…

Optimization and Control · Mathematics 2019-03-04 Riccardo Bonalli , Abhishek Cauligi , Andrew Bylard , Marco Pavone

Item Response Theory (IRT) models are widely used to estimate respondents' latent abilities and calibrate item difficulty. Traditional IRT estimation typically requires centralizing all raw responses, raising privacy and governance…

Machine Learning · Computer Science 2026-04-07 Biying Zhou , Nanyu Luo , Feng Ji

Efficient identity management system has become one of the fundamental requirements for ensuring safe, secure, and transparent use of identifiable information and attributes. FIdM allows users to distribute their identity information across…

Cryptography and Security · Computer Science 2021-04-30 Maha Aldosary , Norah Alqahtani

Collaborative graph analysis across multiple institutions is becoming increasingly popular. Realistic examples include social network analysis across various social platforms, financial transaction analysis across multiple banks, and…

Cryptography and Security · Computer Science 2024-06-03 Shang Liu , Yang Cao , Takao Murakami , Weiran Liu , Seng Pei Liew , Tsubasa Takahashi , Jinfei Liu , Masatoshi Yoshikawa

The Parameter-Efficient Fine-Tuning (PEFT) method, which adjusts or introduces fewer trainable parameters to calibrate pre-trained models on downstream tasks, has become a recent research interest. However, existing PEFT methods within the…

Computation and Language · Computer Science 2023-12-13 Jiacheng Ruan , Jingsheng Gao , Mingye Xie , Suncheng Xiang , Zefang Yu , Ting Liu , Yuzhuo Fu

$X$-secure and $T$-private information retrieval (XSTPIR) is a variant of private information retrieval where data security is guaranteed against collusion among up to $X$ servers and the user's retrieval privacy is guaranteed against…

Information Theory · Computer Science 2026-01-13 Yuan Gao , Weijun Fang , Jingke Xu , Jiejing Wen

Trajectory data has the potential to greatly benefit a wide-range of real-world applications, such as tracking the spread of the disease through people's movement patterns and providing personalized location-based services based on travel…

Databases · Computer Science 2023-10-16 Yuntao Du , Yujia Hu , Zhikun Zhang , Ziquan Fang , Lu Chen , Baihua Zheng , Yunjun Gao

In modern distributed computing applications, such as federated learning and AIoT systems, protecting privacy is crucial to prevent adversarial parties from colluding to steal others' private information. However, guaranteeing the utility…

Cryptography and Security · Computer Science 2023-06-01 Jiandong Liu , Lan Zhang , Chaojie Lv , Ting Yu , Nikolaos M. Freris , Xiang-Yang Li

One of the main goals of financial institutions (FIs) today is combating fraud and financial crime. To this end, FIs use sophisticated machine-learning models trained using data collected from their customers. The output of machine learning…

Federated learning is a distributed learning setting where the main aim is to train machine learning models without having to share raw data but only what is required for learning. To guarantee training data privacy and high-utility models,…

Machine Learning · Computer Science 2025-03-26 Mikko A. Heikkilä

The ability to generate artificial human movement patterns while meeting location and time constraints is an important problem in the security community, particularly as it enables the study of the analog problem of detecting such patterns…

Logic in Computer Science · Computer Science 2025-02-14 Divyagna Bavikadi , Dyuman Aditya , Devendra Parkar , Paulo Shakarian , Graham Mueller , Chad Parvis , Gerardo I. Simari

Federated learning (FL) can be essential in knowledge representation, reasoning, and data mining applications over multi-source knowledge graphs (KGs). A recent study FedE first proposes an FL framework that shares entity embeddings of KGs…

Artificial Intelligence · Computer Science 2022-11-01 Kai Zhang , Yu Wang , Hongyi Wang , Lifu Huang , Carl Yang , Xun Chen , Lichao Sun

The increasing demand for privacy-preserving collaborative learning has given rise to a new computing paradigm called federated learning (FL), in which clients collaboratively train a machine learning (ML) model without revealing their…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-05-31 Zhifeng Jiang , Wei Wang , Bo Li , Qiang Yang

Modern HTTPS mechanisms such as Encrypted Client Hello (ECH) and encrypted DNS improve privacy but remain vulnerable to website fingerprinting (WF) attacks, where adversaries infer visited sites from encrypted traffic patterns. Existing WF…

Cryptography and Security · Computer Science 2025-12-22 Yifei Cheng , Yujia Zhu , Baiyang Li , Xinhao Deng , Yitong Cai , Yaochen Ren , Qingyun Liu

Multi-stage threats like advanced persistent threats (APT) pose severe risks by stealing data and destroying infrastructure, with detection being challenging. APTs use novel attack vectors and evade signature-based detection by obfuscating…

Cryptography and Security · Computer Science 2024-06-21 Florian Nelles , Abbas Yazdinejad , Ali Dehghantanha , Reza M. Parizi , Gautam Srivastava

Traffic time series imputation is crucial for the safety and reliability of intelligent transportation systems, while diverse types of missing data, including random, fiber, and block missing make the imputation task challenging. Existing…

Machine Learning · Computer Science 2025-11-18 Hanwen Hu , Zimo Wen , Shiyou Qian , Jian Co

The COVID-19 pandemic has prompted technological measures to control the spread of the disease. Private contact tracing (PCT) is one of the promising techniques for the purpose. However, the recently proposed Bluetooth-based PCT has several…

Cryptography and Security · Computer Science 2020-11-05 Fumiyuki Kato , Yang Cao , Masatoshi Yoshikawa