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 …

As digital images are consistently generated and transmitted online, the unauthorized
utilization of these images is an increasing concern that has a significant impact on both …

In recent years, image encryption has been broadly researched. Since a large proportion of
images on Internet are compressed, and JPEG is the most widely adopted standards for …

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 …

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 many multimedia applications, image encryption has to be conducted prior to image
compression. This paper proposes an Encryption-then-Compression system using a JPEG …

In many multimedia applications, image encryption has to be conducted prior to image
compression. This letter proposes an Encryption-then-Compression system using JPEG …

Joint image compression and encryption algorithms are intensively investigated due to their
powerful capability of simultaneous image data compression and sensitive information …

An encryption scheme of JPEG images in the bitstream domain is proposed. The proposed
scheme preserves the JPEG format even after encrypting the images, and the file size of …