A Reversible Data Hiding Scheme in Encrypted Image with LSB Compression and MSB Replacement

Abstract

A new scheme of reversible data hiding in encrypted images is proposed in this paper. Content owner first encrypts divided blocks by the specific stream cipher and permutation. During data embedding, data hider embeds secret data into the compressed least significant bits (LSB) and the most significant bits (MSB) of a part of pixels in the smooth region. After the receiver receives the marked, encrypted image, he or she can obtain a directly decrypted image with encryption key. With data-hiding key, the receiver can extract the embedded data from the compressed LSB sequences and MSB layers. If the receiver has both encryption key and data-hiding key, he or she not only can extract the embedded data from the marked, encrypted image, but also can recover original image correctly. Experimental results show our scheme achieves better rate-distortion performance than some reported schemes.