Grayscale-based Block Scrambling Image Encryption for Social Networking Services
Abstract
This paper proposes a new block scrambling encryption scheme that enhances the security of encryption-then-compression (EtC) systems for JPEG images, which are used, for example, to securely transmit images through an untrusted channel provider. The proposed method allows the use of a smaller block size and a larger number of blocks than the conventional ones. Moreover, images encrypted using proposed scheme include less color information due to the use of grayscale even when the original image has three color channels. These features enhance security against various attacks such as jigsaw puzzle solver and brute-force attacks. The results of an experiment in which encrypted images were uploaded to and then downloaded from Twitter and Facebook demonstrated the effectiveness of the proposed scheme for EtC systems.
Keywords
Cite
@article{arxiv.1806.03787,
title = {Grayscale-based Block Scrambling Image Encryption for Social Networking Services},
author = {Warit Sirichotedumrong and Tatsuya Chuman and Shoko Imaizumi and Hitoshi Kiya},
journal= {arXiv preprint arXiv:1806.03787},
year = {2018}
}
Comments
To be appeared in ICME2018 proceedings, 23rd July, 2018