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Many online platforms have deployed anti-fraud systems to detect and prevent fraudulent activities. However, there is usually a gap between the time that a user commits a fraudulent action and the time that the user is suspended by the…

Machine Learning · Computer Science 2018-11-15 Panpan Zheng , Shuhan Yuan , Xintao Wu

Human Activity Recognition supports applications in healthcare, manufacturing, and human-machine interaction. LiDAR point clouds offer a privacy-preserving alternative to cameras and are robust to illumination. We propose a HAR method based…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Sasan Sharifipour , Constantino Álvarez Casado , Le Nguyen , Tharindu Ekanayake , Manuel Lage Cañellas , Nhi Nguyen , Miguel Bordallo López

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

As the application of deep learning continues to grow, so does the amount of data used to make predictions. While traditionally, big-data deep learning was constrained by computing performance and off-chip memory bandwidth, a new constraint…

Cryptography and Security · Computer Science 2020-10-12 Brandon Reagen , Wooseok Choi , Yeongil Ko , Vincent Lee , Gu-Yeon Wei , Hsien-Hsin S. Lee , David Brooks

This paper focuses on the new privacy challenges that arise in smart homes. Specifically, the paper focuses on inferring the user's activities -- which may, in turn, lead to the user's privacy -- via inferences through device activities and…

Cryptography and Security · Computer Science 2020-04-09 Nisha Panwar , Shantanu Sharma , Guoxi Wang , Sharad Mehrotra , Nalini Venkatasubramanian

Falls among elderly residents in assisted living homes pose significant health risks, often leading to injuries and a decreased quality of life. Current fall detection solutions typically rely on sensor-based systems that require dedicated…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Vinayak Mali , Saurabh Jaiswal

Federated learning (FL) has come forward as a critical approach for privacy-preserving machine learning in healthcare, allowing collaborative model training across decentralized medical datasets without exchanging clients' data. However,…

Cryptography and Security · Computer Science 2026-02-06 Abdulkadir Korkmaz , Praveen Rao

The Internet has been weaponized to carry out cybercriminal activities at an unprecedented pace. The rising concerns for preserving the privacy of personal data while availing modern tools and technologies is alarming. End-to-end encrypted…

Cryptography and Security · Computer Science 2020-09-07 Priyanka Singh

Transfer learning is a de facto standard method for efficiently training machine learning models for data-scarce problems by adding and fine-tuning new classification layers to a model pre-trained on large datasets. Although numerous…

Cryptography and Security · Computer Science 2024-06-21 Seewoo Lee , Garam Lee , Jung Woo Kim , Junbum Shin , Mun-Kyu Lee

Privacy protection from surreptitious video recordings is an important societal challenge. We desire a computer vision system (e.g., a robot) that can recognize human activities and assist our daily life, yet ensure that it is not recording…

Computer Vision and Pattern Recognition · Computer Science 2016-12-28 Michael S. Ryoo , Brandon Rothrock , Charles Fleming , Hyun Jong Yang

In the last few years there has been a growing interest in Human Activity Recognition~(HAR) topic. Sensor-based HAR approaches, in particular, has been gaining more popularity owing to their privacy preserving nature. Furthermore, due to…

Machine Learning · Computer Science 2019-03-13 Parviz Asghari , Elnaz Soelimani , Ehsan Nazerfard

We propose a method for human activity recognition from RGB data that does not rely on any pose information during test time and does not explicitly calculate pose information internally. Instead, a visual attention module learns to predict…

Computer Vision and Pattern Recognition · Computer Science 2018-08-22 Fabien Baradel , Christian Wolf , Julien Mille , Graham W. Taylor

This work provides a comprehensive review of existing frameworks based on secure computing techniques in the context of private image classification. The in-depth analysis of these approaches is followed by careful examination of their…

Cryptography and Security · Computer Science 2020-11-12 Veneta Haralampieva , Daniel Rueckert , Jonathan Passerat-Palmbach

Recent research shows that colluded malware in different VMs sharing a single physical host may use a resource as a channel to leak critical information. Covert channels employ time or storage characteristics to transmit confidential…

Distributed, Parallel, and Cluster Computing · Computer Science 2015-11-09 Mansaf Alam , Shuchi Sethi

Human action recognition from well-segmented 3D skeleton data has been intensively studied and has been attracting an increasing attention. Online action detection goes one step further and is more challenging, which identifies the action…

Computer Vision and Pattern Recognition · Computer Science 2016-07-27 Yanghao Li , Cuiling Lan , Junliang Xing , Wenjun Zeng , Chunfeng Yuan , Jiaying Liu

Cache coherence protocols based on self-invalidation and self-downgrade have recently seen increased popularity due to their simplicity, potential performance efficiency, and low energy consumption. However, such protocols result in memory…

Logic in Computer Science · Computer Science 2023-06-22 Parosh Aziz Abdulla , Mohamed Faouzi Atig , Stefanos Kaxiras , Carl Leonardsson , Alberto Ros , Yunyun Zhu

The research on human activity recognition has provided novel solutions to many applications like healthcare, sports, and user profiling. Considering the complex nature of human activities, it is still challenging even after effective and…

Human-Computer Interaction · Computer Science 2023-07-11 Ranjit Kolkar , Geetha V

When we say a person is texting, can you tell the person is walking or sitting? Emphatically, no. In order to solve this incomplete representation problem, this paper presents a sub-action descriptor for detailed action detection. The…

Computer Vision and Pattern Recognition · Computer Science 2017-10-11 Cheng-Bin Jin , Shengzhe Li , Hakil Kim

The rapid development of video surveillance systems for object detection, tracking, activity recognition, and anomaly detection has revolutionized our day-to-day lives while setting alarms for privacy concerns. It isn't easy to strike a…

Computer Vision and Pattern Recognition · Computer Science 2025-04-22 Nazia Aslam , Kamal Nasrollahi

In the big data era, cloud-based machine learning as a service (MLaaS) has attracted considerable attention. However, when handling sensitive data, such as financial and medical data, a privacy issue emerges, because the cloud server can…

Machine Learning · Computer Science 2020-12-03 Takumi Ishiyama , Takuya Suzuki , Hayato Yamana