This article presents an overview of image transformation with a secret key and its
applications. Image transformation with a secret key enables us not only to protect visual …

A block scrambling-based encryption scheme is presented to enhance the security of
Encryption-then-Compression (EtC) systems with JPEG compression, which allow us to …

We present a novel privacy-preserving scheme for deep neural networks (DNNs) that
enables us not to only apply images without visual information to DNNs for both training and …

We present a novel privacy-preserving scheme for deep neural networks (DNNs) that
enables us not to only apply images without visual information to DNNs but to also consider …

We propose a novel image transformation scheme using generative adversarial networks
(GANs) for privacy-preserving deep neural networks (DNNs). The proposed scheme …

In the participatory sensing framework, privacy protection of the Internet of Things (IoT) is
very important. In this article, cryptography-based methods are utilized to protect participants' …

We propose a novel image transformation network for generating visually protected images
for privacy-preserving deep neural networks (DNNs). The proposed transformation network …

A novel grayscale-based block scrambling image encryption scheme is presented not only
to enhance security, but also to improve the compression performance for Encryption-then …

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 …

In recent years, with the rapid development of chaotic technology, many chaotic image
cryptosystems based on pixel/bit-level techniques have been investigated. However, the …