Reversible Data Hiding in Encrypted Images Based on Image Interpolation
Guorui Feng and
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Xiyu Han: Shanghai University, Shanghai, China
Zhenxing Qian: Shanghai University, Shanghai, China
Guorui Feng: Shanghai University, Shanghai, China
Xinpeng Zhang: Shanghai University, Shanghai, China
International Journal of Digital Crime and Forensics (IJDCF), 2014, vol. 6, issue 3, 16-29
This paper proposes a novel method for data hiding in encrypted image using image interpolation. Before the image encryption, the original image is sampled and an interpolation algorithm is used to calculate an estimation of the original image. Errors between the original image and the estimated image are compressed by Huffman encoding, which are further embedded into the estimated image to generate the redundant room. After image encryption using an encryption key, the secret bits are embedded into the reserved room. On the receiver side, the hidden bits can be extracted and the original content of the image can be perfectly recovered. Compared with the published results, the proposed method provides a larger embedding payload.
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