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A privacy-preserving support vector machine (SVM) computing scheme is proposed in this paper. Cloud computing has been spreading in many fields. However, the cloud computing has some serious issues for end users, such as the unauthorized…

Cryptography and Security · Computer Science 2020-01-08 Takahiro Maekawa , Ayana Kawamura , Takayuki Nakachi , Hitoshi Kiya

In this paper, we propose a combined use of transformed images and vision transformer (ViT) models transformed with a secret key. We show for the first time that models trained with plain images can be directly transformed to models trained…

Computer Vision and Pattern Recognition · Computer Science 2023-01-11 Hitoshi Kiya , Ryota Iijima , MaungMaung Aprilpyone , Yuma Kinoshita

Storage requirements for visual data have been increasing in recent years, following the emergence of many new highly interactive, multimedia services and applications for both personal and corporate use. This has been a key driving factor…

Cryptography and Security · Computer Science 2015-07-20 Bernardo Ferreira , João Rodrigues , João Leitão , Henrique Domingos

Massive human-related data is collected to train neural networks for computer vision tasks. A major conflict is exposed relating to software engineers between better developing AI systems and distancing from the sensitive training data. To…

Computer Vision and Pattern Recognition · Computer Science 2023-06-07 Fusheng Hao , Fengxiang He , Yikai Wang , Fuxiang Wu , Jing Zhang , Jun Cheng , Dacheng Tao

Unsupervised image hashing, which maps images into binary codes without supervision, is a compressor with a high compression rate. Hence, how to preserving meaningful information of the original data is a critical problem. Inspired by the…

Computer Vision and Pattern Recognition · Computer Science 2022-01-17 Qinkang Gong , Liangdao Wang , Hanjiang Lai , Yan Pan , Jian Yin

Vision Transformers (ViTs) have revolutionized computer vision by leveraging self-attention to model long-range dependencies. However, ViTs face challenges such as high computational costs due to the quadratic scaling of self-attention and…

Computer Vision and Pattern Recognition · Computer Science 2025-04-22 Zhoujie Qian

In recent years, deep neural networks (DNNs) trained with transformed data have been applied to various applications such as privacy-preserving learning, access control, and adversarial defenses. However, the use of transformed data…

Computer Vision and Pattern Recognition · Computer Science 2023-09-08 Teru Nagamori , Sayaka Shiota , Hitoshi Kiya

The Vision Transformer (ViT) architecture has emerged as the backbone of choice for state-of-the-art deep models for computer vision applications. However, ViTs are ill-suited for private inference using secure multi-party computation (MPC)…

Cryptography and Security · Computer Science 2023-10-10 Naren Dhyani , Jianqiao Mo , Minsu Cho , Ameya Joshi , Siddharth Garg , Brandon Reagen , Chinmay Hegde

This article presents block-wise image encryption for the vision transformer and its applications. Perceptual image encryption for deep learning enables us not only to protect the visual information of plain images but to also embed unique…

Cryptography and Security · Computer Science 2023-08-16 Hitoshi Kiya , Ryota Iijima , Teru Nagamori

With the increasing prevalence of cloud computing platforms, ensuring data privacy during the cloud-based image related services such as classification has become crucial. In this study, we propose a novel privacypreserving image…

Computer Vision and Pattern Recognition · Computer Science 2023-10-20 Jun Liu , Jiantao Zhou , Jinyu Tian , Weiwei Sun

In this paper, we propose a privacy-preserving image-retrieval scheme using a codebook generated by using a plain-image dataset. Encryption-then-compression (EtC) images, which were proposed for EtC systems, have been used in conventional…

Image and Video Processing · Electrical Eng. & Systems 2021-09-07 Kenta Iida , Hitoshi Kiya

Vision Transformers (ViTs) have emerged as state-of-the-art models for various vision tasks recently. However, their heavy computation costs remain daunting for resource-limited devices. To address this, researchers have dedicated…

Computer Vision and Pattern Recognition · Computer Science 2025-10-20 Ao Wang , Hui Chen , Zijia Lin , Sicheng Zhao , Jungong Han , Guiguang Ding

We propose a privacy-preserving machine learning scheme with encryption-then-compression (EtC) images, where EtC images are images encrypted by using a block-based encryption method proposed for EtC systems with JPEG compression. In this…

Cryptography and Security · Computer Science 2020-12-30 Ayana Kawamura , Yuma Kinoshita , Takayuki Nakachi , Sayaka Shiota , Hitoshi Kiya

We propose a privacy-preserving semantic-segmentation method for applying perceptual encryption to images used for model training in addition to test images. This method also provides almost the same accuracy as models without any…

Computer Vision and Pattern Recognition · Computer Science 2025-07-18 Homare Sueyoshi , Kiyoshi Nishikawa , Hitoshi Kiya

Vision Transformers (ViT) have emerged as the de-facto choice for numerous industry grade vision solutions. But their inference cost can be prohibitive for many settings, as they compute self-attention in each layer which suffers from…

Computer Vision and Pattern Recognition · Computer Science 2024-07-18 Rajat Koner , Gagan Jain , Prateek Jain , Volker Tresp , Sujoy Paul

The improved semantic understanding of vision-language pretrained (VLP) models has made it increasingly difficult to protect publicly posted images from being exploited by search engines and other similar tools. In this context, this paper…

Computer Vision and Pattern Recognition · Computer Science 2025-06-25 Xuelin Shen , Jiayin Xu , Kangsheng Yin , Wenhan Yang

In recent years, the rapid advancement of deepfake technology has revolutionized content creation, lowering forgery costs while elevating quality. However, this progress brings forth pressing concerns such as infringements on individual…

Computer Vision and Pattern Recognition · Computer Science 2024-05-15 Zhikan Wang , Zhongyao Cheng , Jiajie Xiong , Xun Xu , Tianrui Li , Bharadwaj Veeravalli , Xulei Yang

Removing noise from images is a challenging and fundamental problem in the field of computer vision. Images captured by modern cameras are inevitably degraded by noise which limits the accuracy of any quantitative measurements on those…

Computer Vision and Pattern Recognition · Computer Science 2023-07-13 Nikhil Verma , Deepkamal Kaur , Lydia Chau

The most recent year has witnessed the success of applying the Vision Transformer (ViT) for image classification. However, there are still evidences indicating that ViT often suffers following two aspects, i) the high computation and the…

Computer Vision and Pattern Recognition · Computer Science 2021-12-30 Xian Wei , Bin Wang , Mingsong Chen , Ji Yuan , Hai Lan , Jiehuang Shi , Xuan Tang , Bo Jin , Guozhang Chen , Dongping Yang

Deep learning models are increasingly utilized on resource-constrained edge devices for real-time data analytics. Recently, Vision Transformer and their variants have shown exceptional performance in various computer vision tasks. However,…

Computer Vision and Pattern Recognition · Computer Science 2025-05-22 Xiang Liu , Yijun Song , Xia Li , Yifei Sun , Huiying Lan , Zemin Liu , Linshan Jiang , Jialin Li