Three Phase Approach For Reversible Data Hiding In Encrypted Image
One of the new method of using Distributed Source Coding (DSC) for reversible data hiding (RDH) in
encrypted images. The content owner will encrypt original image using the stream cipher. After encryption compresses a
series of selected bits taken from encrypted image by the data-hider, to make a room for secret data. The selected bit series is
Slepian –Wolf encoded using low density parity check (LDPC) codes. On the receiver side, if he/she has a embedding key
only the secret bits can be extracted. Otherwise if receiver has encryption key only the approximately recover the original
image using image estimation algorithm with high quality. In case, the receiver has both the embedding key and encryption
keys, he/she can use distributed source decoding and can extract secret data and perfectly recover the original image. The
proposed method performs more than previous methods.
Index Terms— Reversible Data Hiding, Image Encryption, Image Recovery.