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The widespread adoption of face recognition has led to increasing privacy concerns, as unauthorized access to face images can expose sensitive personal information. This paper explores face image protection against viewing and recovery…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Yuxi Mi , Zhizhou Zhong , Yuge Huang , Jiazhen Ji , Jianqing Xu , Jun Wang , Shaoming Wang , Shouhong Ding , Shuigeng Zhou

There is an increasing concern in computer vision devices invading users' privacy by recording unwanted videos. On the one hand, we want the camera systems to recognize important events and assist human daily lives by understanding its…

Computer Vision and Pattern Recognition · Computer Science 2018-07-30 Zhongzheng Ren , Yong Jae Lee , Michael S. Ryoo

In today's data-driven analytics landscape, deep learning has become a powerful tool, with latent representations, known as embeddings, playing a central role in several applications. In the face analytics domain, such embeddings are…

Cryptography and Security · Computer Science 2025-05-20 Arjun Ramesh Kaushik , Bharat Chandra Yalavarthi , Arun Ross , Vishnu Boddeti , Nalini Ratha

In recent years, privacy-preserving methods for deep learning have become an urgent problem. Accordingly, we propose the combined use of federated learning (FL) and encrypted images for privacy-preserving image classification under the use…

Computer Vision and Pattern Recognition · Computer Science 2023-03-06 Teru Nagamori , Hitoshi Kiya

Much of machine learning relies on the use of large amounts of data to train models to make predictions. When this data comes from multiple sources, for example when evaluation of data against a machine learning model is offered as a…

Cryptography and Security · Computer Science 2020-01-30 Peter Fenner , Edward O. Pyzer-Knapp

Video privacy leakage is becoming an increasingly severe public problem, especially in cloud-based video surveillance systems. It leads to the new need for secure cloud-based video applications, where the video is encrypted for privacy…

Image and Video Processing · Electrical Eng. & Systems 2021-08-31 Xianhao Tian , Peijia Zheng , Jiwu Huang

Federated video action recognition enables collaborative model training without sharing raw video data, yet remains vulnerable to two key challenges: \textit{model exposure} and \textit{communication overhead}. Gradients exchanged between…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Idris Zakariyya , Pai Chet Ng , Kaushik Bhargav Sivangi , S. Mohammad Sheikholeslami , Konstantinos N. Plataniotis , Fani Deligianni

Concerns for the privacy of individuals captured in public imagery have led to privacy-preserving action recognition. Existing approaches often suffer from issues arising through obfuscation being applied globally and a lack of…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Filip Ilic , He Zhao , Thomas Pock , Richard P. Wildes

There has been a growing trend in compressing and transmitting videos from terminals for machine vision tasks. Nevertheless, most video coding optimization method focus on minimizing distortion according to human perceptual metrics,…

Multimedia · Computer Science 2025-12-18 Fei Zhao , Mengxi Guo , Shijie Zhao , Junlin Li , Li Zhang , Xiaodong Xie

Security monitoring via ubiquitous cameras and their more extended in intelligent buildings stand to gain from advances in signal processing and machine learning. While these innovative and ground-breaking applications can be considered as…

Cryptography and Security · Computer Science 2026-05-06 Mehmet Yamac , Mete Ahishali , Nikolaos Passalis , Jenni Raitoharju , Bulent Sankur , Moncef Gabbouj

Federated learning (FL) is an emerging paradigm that allows a central server to train machine learning models using remote users' data. Despite its growing popularity, FL faces challenges in preserving the privacy of local datasets, its…

Cryptography and Security · Computer Science 2025-05-09 Natalie Lang , Nir Shlezinger , Rafael G. L. D'Oliveira , Salim El Rouayheb

Securing multimedia data has become of utmost importance especially in the applications related to military purposes. With the rise in development in computer and internet technology, multimedia data has become the most convenient method…

Cryptography and Security · Computer Science 2013-03-17 Ajay Kulkarni , Saurabh Kulkarni , Ketki Haridas , Aniket More

Facial expression recognition (FER) systems raise significant privacy concerns due to the potential exposure of sensitive identity information. This paper presents a study on removing identity information while preserving FER capabilities.…

Computer Vision and Pattern Recognition · Computer Science 2024-12-04 Feng Xu , David Ahmedt-Aristizabal , Lars Petersson , Dadong Wang , Xun Li

Currently, video transmission serves not only the Human Visual System (HVS) for viewing but also machine perception for analysis. However, existing codecs are primarily optimized for pixel-domain and HVS-perception metrics rather than the…

Image and Video Processing · Electrical Eng. & Systems 2025-03-28 Yuxiao Sun , Yao Zhao , Meiqin Liu , Chao Yao , Weisi Lin

In the era of cloud computing and data-driven applications, it is crucial to protect sensitive information to maintain data privacy, ensuring truly reliable systems. As a result, preserving privacy in deep learning systems has become a…

Computer Vision and Pattern Recognition · Computer Science 2024-04-10 Fabian Perez , Jhon Lopez , Henry Arguello

Despite the rapid progress of deep learning in video action recognition (VAR) in recent years, privacy leakage in videos remains a critical concern. Current state-of-the-art privacy-preserving methods often rely on anonymization. These…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Lixin Chen , Chaomeng Chen , Jiale Zhou , Zhijian Wu , Xun Lin

Homomorphic Encryption (HE) is a commonly used tool for building privacy-preserving applications. However, in scenarios with many clients and high-latency networks, communication costs due to large ciphertext sizes are the bottleneck. In…

Cryptography and Security · Computer Science 2024-07-30 Rasoul Akhavan Mahdavi , Abdulrahman Diaa , Florian Kerschbaum

We propose a method to compress full-resolution video sequences with implicit neural representations. Each frame is represented as a neural network that maps coordinate positions to pixel values. We use a separate implicit network to…

Machine Learning · Computer Science 2021-12-22 Yunfan Zhang , Ties van Rozendaal , Johann Brehmer , Markus Nagel , Taco Cohen

Publicly available large pretrained models (i.e., backbones) and lightweight adapters for parameter-efficient fine-tuning (PEFT) have become standard components in modern machine learning pipelines. However, preserving the privacy of both…

Cryptography and Security · Computer Science 2025-11-07 Saisai Xia , Wenhao Wang , Zihao Wang , Yuhui Zhang , Yier Jin , Dan Meng , Rui Hou

In today's data-driven world, recommendation systems personalize user experiences across industries but rely on sensitive data, raising privacy concerns. Fully homomorphic encryption (FHE) can secure these systems, but a significant…

Cryptography and Security · Computer Science 2025-09-04 Moontaha Nishat Chowdhury , André Bauer , Minxuan Zhou