To improve data hiding using combination of cryptography and stegnography

Abstract

Unpredictable data hiding in encrypted images is an effective technique to implant data in the encrypted domain. Original image is encrypted with a secret key and during or after its communication, it is possible to embed additional information in the encrypted image, without knowing the original information of the image or encrypted image. During the process of decoding, the secret message can be removed and the actual image can be reconstructed. RDHEI has started to draw research interest. Certainly, with the Growth of cloud computing, data privacy has become a real issue. No existing methods allows us to hide a huge amount of information in a reversible manner. In this paper, we presented a new reversible method based on MSB (most significant bit) predication with a very high capacity. We present two proposals, these are: high capacity reversible data hiding with embedded prediction errors (EPE-HCRDH) and high capacity reversible data hiding with correction of prediction errors (CPE-HCRDH) with this
two method, our results are better than those obtained with current state of the methods, both in term embedding capacity and also in terms of reconstructed image quality