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Separable reversible data hiding in encrypted image based on pixel value ordering and additive homomorphism

机译:基于像素值排序和加性同态的加密图像中可分离的可逆数据隐藏

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摘要

This work proposes a separable reversible data hiding scheme in encrypted images based on pixel value ordering (PVO). After the original image is encrypted using homomorphism encryption by the content owner, the data hider embeds the secret data in encrypted domain. The PVO strategy realizes hiding data in each block. Additive homomorphism guarantees the performance of PVO in encrypted domain is close to that in plain domain. Besides, the homomorphism encryption does not cause data expansion, and the payload can be further improved. With the watermarked encrypted image, if the receiver has only the data hiding key, he can extract the additional data. If the receiver has only the encryption key, he can obtain a decrypted image similar to the original one. If the receiver has both the data hiding key and the encryption key, he can extract the additional data without any error and recover the original image losslessly. (C) 2017 Elsevier Inc. All rights reserved.
机译:这项工作提出了一种基于像素值排序(PVO)的加密图像中可分离的可逆数据隐藏方案。在内容所有者使用同态加密对原始图像进行加密之后,数据隐藏程序将机密数据嵌入加密域中。 PVO策略实现了在每个块中隐藏数据。加性同态性保证了加密域中PVO的性能接近普通域中的PVO。此外,同态加密不会引起数据扩展,并且可以进一步提高有效载荷。使用加水印的加密图像,如果接收者仅具有数据隐藏密钥,则他可以提取其他数据。如果接收者只有加密密钥,则他可以获得与原始图像相似的解密图像。如果接收者同时具有数据隐藏密钥和加密密钥,则他可以毫无问题地提取附加数据,并无损恢复原始图像。 (C)2017 Elsevier Inc.保留所有权利。

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