Reversible Data Hiding Scheme in Encrypted-Image Based on Prediction and Compression Coding
For cloud storage management and security of images, more and more attention is paid to reversible data hiding in encrypted images (RDH-EI). This work proposes a RDH-EI method based on a novel compression coding that can vacate more space for data hiding. To improve the embedding capacity, several most significant bits (MSB) of an original image are firstly predicted in turn to generate the corresponding prediction bit-planes, and then the XOR operation and a shorter variable-length coding are designed to further decrease the coding length of the prediction bit-planes. The proposed scheme can achieve a larger embedding capacity and real reversibility and lossless decryption. Experimental results demonstrate that the performance of the proposed method outperforms other RDH-EI schemes, including embedding capacity, reversibility and the ability against the cipher-only attack.
KeywordsReversible data hiding Image encryption Cloud storage Compression coding
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