DefinePK

Abstract

Reversible data hiding in encrypted domain (RDHED) has greatly attracted researchers as the original content can be losslessly reconstructed after the embedded data are extracted, while the content owner’s privacy remains protected. Connecting the probable feature of public key cryptosystem, the proposed system utilizes elliptical curve cryptography for cost effective computation of secret keys required for performing encryption. Steganography process hides message into cover file and forms a stego file. In image steganography there is a need of method which will increase the security, reduce the distortion in the stego file and recovers the data without any loss. The proposed approach is the combination of data hiding technique and encryption. The image is encrypted using ECC to ensure user authentication. The key which are very confidential can be hidden into an encrypted image which is made a watermark image by applying the RDH (Reversible data hiding algorithm) without changing the bit stream size. Once receiver got encrypted stego file they can access the secret key by using a reverse process of data hiding. ECC is a superior option for open key encryption. It gives parallel security smaller key size.