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In this paper, we propose a novel method for protecting convolutional neural network (CNN) models with a secret key set so that unauthorized users without the correct key set cannot access trained models. The method enables us to protect…

Computer Vision and Pattern Recognition · Computer Science 2021-06-01 AprilPyone MaungMaung , Hitoshi Kiya

In this paper, we propose an access control method with a secret key for semantic segmentation models for the first time so that unauthorized users without a secret key cannot benefit from the performance of trained models. The method…

Computer Vision and Pattern Recognition · Computer Science 2022-06-14 Hiroki Ito , AprilPyone MaungMaung , Sayaka Shiota , Hitoshi Kiya

In this paper, we propose a model protection method for convolutional neural networks (CNNs) with a secret key so that authorized users get a high classification accuracy, and unauthorized users get a low classification accuracy. The…

Computer Vision and Pattern Recognition · Computer Science 2021-09-02 MaungMaung AprilPyone , Hitoshi Kiya

In this paper, we propose a model protection method by using block-wise pixel shuffling with a secret key as a preprocessing technique to input images for the first time. The protected model is built by training with such preprocessed…

Machine Learning · Computer Science 2020-08-07 MaungMaung AprilPyone , Hitoshi Kiya

In this paper, we propose a block-wise image transformation method with a secret key for support vector machine (SVM) models. Models trained by using transformed images offer a poor performance to unauthorized users without a key, while…

Computer Vision and Pattern Recognition · Computer Science 2021-11-18 Ryota Iijima , AprilPyone MaungMaung , Hitoshi Kiya

In this paper, we propose an access control method that uses the spatially invariant permutation of feature maps with a secret key for protecting semantic segmentation models. Segmentation models are trained and tested by permuting selected…

Computer Vision and Pattern Recognition · Computer Science 2021-09-06 Hiroki Ito , MaungMaung AprilPyone , Hitoshi Kiya

A novel method for access control with a secret key is proposed to protect models from unauthorized access in this paper. We focus on semantic segmentation models with the vision transformer (ViT), called segmentation transformer (SETR).…

Computer Vision and Pattern Recognition · Computer Science 2022-08-30 Teru Nagamori , Ryota Iijima , Hitoshi Kiya

We propose a novel method for protecting trained models with a secret key so that unauthorized users without the correct key cannot get the correct inference. By taking advantage of transfer learning, the proposed method enables us to train…

Machine Learning · Computer Science 2021-03-08 MaungMaung AprilPyone , Hitoshi Kiya

Trained Deep Neural Network (DNN) models are considered valuable Intellectual Properties (IP) in several business models. Prevention of IP theft and unauthorized usage of such DNN models has been raised as of significant concern by…

Machine Learning · Computer Science 2024-02-20 Manaar Alam , Sayandeep Saha , Debdeep Mukhopadhyay , Sandip Kundu

This paper proposes a novel privacy-preserving semantic segmentation method that can use independent keys for each client and image. In the proposed method, the model creator and each client encrypt images using locally generated keys, and…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Mare Hirose , Shoko Imaizumi , Hitoshi Kiya

In this paper, we propose an access control method with a secret key for object detection models for the first time so that unauthorized users without a secret key cannot benefit from the performance of trained models. The method enables us…

Computer Vision and Pattern Recognition · Computer Science 2023-01-11 Teru Nagamori , Hiroki Ito , AprilPyone MaungMaung , Hitoshi Kiya

Training a deep neural network (DNN) requires a high computational cost. Buying models from sellers with a large number of computing resources has become prevailing. However, the buyer-seller environment is not always trusted. To protect…

Cryptography and Security · Computer Science 2023-12-12 Yusheng Guo , Nan Zhong , Zhenxing Qian , Xinpeng Zhang

Deep neural networks (DNNs) are utilized in numerous image processing, object detection, and video analysis tasks and need to be implemented using hardware accelerators to achieve practical speed. Logic locking is one of the most popular…

Cryptography and Security · Computer Science 2022-10-10 Jingbo Zhou , Xinmiao Zhang

In this paper, we propose a novel learnable image encryption method for privacy-preserving deep neural networks (DNNs). The proposed method is carried out on the basis of block scrambling used in combination with data augmentation…

Cryptography and Security · Computer Science 2021-06-01 Tatsuya Chuman , Hitoshi Kiya

In this paper, we propose a novel DNN watermarking method that utilizes a learnable image transformation method with a secret key. The proposed method embeds a watermark pattern in a model by using learnable transformed images and allows us…

Computer Vision and Pattern Recognition · Computer Science 2021-04-12 MaungMaung AprilPyone , Hitoshi Kiya

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

Backdoor attacks have severely threatened deep neural network (DNN) models in the past several years. These attacks can occur in almost every stage of the deep learning pipeline. Although the attacked model behaves normally on benign…

Computer Vision and Pattern Recognition · Computer Science 2024-05-21 Yangming Chen

Privacy-preserving deep neural networks (DNNs) have been proposed for protecting data privacy in the cloud server. Although several encryption schemes for visually protection have been proposed for privacy-preserving DNNs, several attacks…

Cryptography and Security · Computer Science 2022-11-11 Tatsuya Chuman , Hitoshi Kiya

Deep neural networks (DNNs) are vulnerable to the \emph{backdoor attack}, which intends to embed hidden backdoors in DNNs by poisoning training data. The attacked model behaves normally on benign samples, whereas its prediction will be…

Cryptography and Security · Computer Science 2021-04-06 Yiming Li , Yanjie Li , Yalei Lv , Yong Jiang , Shu-Tao Xia

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
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