Reversible Data Hiding In Encrypted Images by Reserving Room before Encryption
Reversible Data Hiding In Encrypted Images by Reserving Room before Encryption
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DOI：
10.17950/ijer/v3s7/705
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
H. G;Smitha Shekar B;Prajwal R,;Sunil S Shetty
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文献类型：
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作者：
H. G;Smitha Shekar B;Prajwal R,;Sunil S Shetty
近年来，加密图像中的可逆数据隐藏（RDH）受到了越来越多的关注，因为它具有在提取嵌入数据后能够无损恢复原始载体，同时保护图像内容保密性的优良特性。以往所有的方法都是通过从加密图像中可逆地腾出空间来嵌入数据，这可能会在数据提取和/或图像恢复方面出现一些误差。在此，提出了一种新的方法，以便在加密前使用传统的可逆数据隐藏算法预留空间，从而使数据隐藏者能够轻松地在加密图像中可逆地嵌入数据。所提出的方法能够实现真正的可逆性，即数据提取和图像恢复没有任何误差。
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 subject to some errors on data extraction and/or image restoration. Here, a novel method is proposed so as to reserve 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, i.e., data extraction and image recovery are free of any error.