Enhanced encrypted reversible data hiding algorithm with minimum distortion through homomorphic encryption
Enhanced encrypted reversible data hiding algorithm with minimum distortion through homomorphic encryption
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DOI：
10.1117/1.jei.27.2.023017
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发表时间：
2018-04
影响因子：
1.1
通讯作者：
R. Bhardwaj
中科院分区：
文献类型：
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作者：
R. Bhardwaj
抽象的。可逆数据隐藏意味着以这样的方式将秘密消息嵌入到覆盖图像中，使得在提取秘密消息的过程中，覆盖图像以及秘密消息被无错误地恢复。目前大多数可逆信息隐藏算法的目标都是提高嵌入率和增强隐写图像的视觉质量。提出了一种改进的基于离散域的可逆信息隐藏算法，在原始图像的每个灰度像素中嵌入两个二进制比特，同时使隐写像素的失真最小。该算法的主要特点是像素值失真最小化、下溢和上溢问题的消除以及隐写图像与PSNR为∞（Lena、Goldhill和Barbara图像）的覆盖图像的等价性。实验结果表明，在平均峰值信噪比和嵌入率方面，对于自然图像，该算法的性能优于其他传统的。
Abstract. Reversible data hiding means embedding a secret message in a cover image in such a manner, to the point that in the midst of extraction of the secret message, the cover image and, furthermore, the secret message are recovered with no error. The goal of by far most of the reversible data hiding algorithms is to have improved the embedding rate and enhanced visual quality of stego image. An improved encrypted-domain-based reversible data hiding algorithm to embed two binary bits in each gray pixel of original cover image with minimum distortion of stego-pixels is employed in this paper. Highlights of the proposed algorithm are minimum distortion of pixel’s value, elimination of underflow and overflow problem, and equivalence of stego image and cover image with a PSNR of ∞ (for Lena, Goldhill, and Barbara image). The experimental outcomes reveal that in terms of average PSNR and embedding rate, for natural images, the proposed algorithm performed better than other conventional ones.