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Article

A Reversible Data Hiding Method in Encrypted Images for Controlling Trade-Off between Hiding Capacity and Compression Efficiency

1
Graduate School of Science and Engineering, Chiba University, 1-33 Yayoicho, Chiba 263-8522, Japan
2
Graduate School of Engineering, Chiba University, 1-33 Yayoicho, Chiba 263-8522, Japan
3
Department of Computer Science, Tokyo Metropolitan University, 6-6 Asahigaoka, Tokyo 191-0065, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Piva
J. Imaging 2021, 7(12), 268; https://doi.org/10.3390/jimaging7120268
Received: 19 October 2021 / Revised: 2 December 2021 / Accepted: 3 December 2021 / Published: 7 December 2021
(This article belongs to the Special Issue Intelligent Media Processing)
In this paper, we propose a new framework for reversible data hiding in encrypted images, where both the hiding capacity and lossless compression efficiency are flexibly controlled. There exist two main purposes; one is to provide highly efficient lossless compression under a required hiding capacity, while the other is to enable us to extract an embedded payload from a decrypted image. The proposed method can decrypt marked encrypted images without data extraction and derive marked images. An original image is arbitrarily divided into two regions. Two different methods for reversible data hiding in encrypted images (RDH-EI) are used in our method, and each one is used for either region. Consequently, one region can be decrypted without data extraction and also losslessly compressed using image coding standards even after the processing. The other region possesses a significantly high hiding rate, around 1 bpp. Experimental results show the effectiveness of the proposed method in terms of hiding capacity and lossless compression efficiency. View Full-Text
Keywords: reversible data hiding; image encryption; encryption-then-compression system; lossless compression; hiding capacity reversible data hiding; image encryption; encryption-then-compression system; lossless compression; hiding capacity
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MDPI and ACS Style

Motomura, R.; Imaizumi, S.; Kiya, H. A Reversible Data Hiding Method in Encrypted Images for Controlling Trade-Off between Hiding Capacity and Compression Efficiency. J. Imaging 2021, 7, 268. https://doi.org/10.3390/jimaging7120268

AMA Style

Motomura R, Imaizumi S, Kiya H. A Reversible Data Hiding Method in Encrypted Images for Controlling Trade-Off between Hiding Capacity and Compression Efficiency. Journal of Imaging. 2021; 7(12):268. https://doi.org/10.3390/jimaging7120268

Chicago/Turabian Style

Motomura, Ryota, Shoko Imaizumi, and Hitoshi Kiya. 2021. "A Reversible Data Hiding Method in Encrypted Images for Controlling Trade-Off between Hiding Capacity and Compression Efficiency" Journal of Imaging 7, no. 12: 268. https://doi.org/10.3390/jimaging7120268

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