Separable and Error-Free Reversible Data Hiding in Encrypted Image Based on Two-Layer Pixel Errors

Separable and Error-Free Reversible Data Hiding in Encrypted Image Based on Two-Layer Pixel Errors

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Reversible data hiding is an important topic of data hiding.This paper proposes a novel separable and error-free reversible data hiding in an encrypted image based on two-layer pixel errors.Specifically, the proposed scheme divides the original image into a series of non-overlapped blocks and permutes these blocks.

Then, a closed Hilbert curve is used for scanning each Bupleurum block to obtain a one-dimensional pixel sequence.The pixels of the sequence are encrypted with key transmission.During data hiding, each non-overlapped block of the encrypted image is scanned in the closed Hilbert order to generate a one-dimensional encrypted pixel sequence.

Finally, it exploits the histogram of two-layer adjacent encrypted pixel Beard Care errors to embed secret data by histogram shifting and generate a marked encrypted image.Many experiments are carried out, and the results demonstrate that the proposed scheme reaches a high payload and outperforms some reversible data hiding schemes in the encrypted image.