Reversible Data Hiding in Encrypted Images by Reserving Room Before Encryption

被引:550
作者
Ma, Kede [1 ]
Zhang, Weiming [1 ]
Zhao, Xianfeng [2 ]
Yu, Nenghai [1 ]
Li, Fenghua [2 ]
机构
[1] Univ Sci & Technol China, Sch Informat Sci & Technol, Hefei 230026, Peoples R China
[2] Chinese Acad Sci, State Key Lab Informat Secur, Inst Informat Engn, Beijing 100093, Peoples R China
关键词
Reversible data hiding; image encryption; privacy protection; histogram shift;
D O I
10.1109/TIFS.2013.2248725
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
Recently, more and more attention is paid to reversible data hiding (RDH) in encrypted images, since it maintains the excellent property that the original cover can be losslessly recovered after embedded data is extracted while protecting the image content's confidentiality. All previous methods embed data by reversibly vacating room from the encrypted images, which may be subject to some errors on data extraction and/or image restoration. In this paper, we propose a novel method by reserving room before encryption with a traditional RDH algorithm, and thus it is easy for the data hider to reversibly embed data in the encrypted image. The proposed method can achieve real reversibility, that is, data extraction and image recovery are free of any error. Experiments show that this novel method can embed more than 10 times as large payloads for the same image quality as the previous methods, such as for PSNR dB.
引用
收藏
页码:553 / 562
页数:10
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