Reversible Data Hiding in Encrypted Images Using MSBs Integration and Histogram Modification
This addresses secure data embedding in encrypted images for content owners, though it appears incremental as it builds on existing RDH techniques.
The paper tackles reversible data hiding in encrypted images by integrating most significant bits and using histogram modification, achieving perfect reconstruction of the original image without the data hider key and outperforming state-of-the-art methods.
This paper presents a reversible data hiding in encrypted image that employs based notions of the RDH in plain-image schemes including histogram modification and prediction-error computation. In the proposed method, original image may be encrypted by desire encryption algorithm. Most significant bit (MSB) of encrypted pixels are integrated to vacate room for embedding data bits. Integrated ones will be more resistant against failure of reconstruction if they are modified for embedding data bits. At the recipient, we employ chess-board predictor for lossless reconstruction of the original image by the aim of prediction-error analysis. Comparing to existent RDHEI algorithms, not only we propose a separable method to extract data bits, but also content-owner may attain a perfect reconstruction of the original image without having data hider key. Experimental results confirm that the proposed algorithm outperforms state of the art ones.