Abstract: The reversible encrypted data concealment in encrypted images is used to hide encrypted data in encrypted images for secret communication which has very high security. The project proposes the enhancement of protection system for secret data communication through encrypted data concealment in encrypted images. The image is then separated into number of blocks locally and lifting wavelet transform will be used to detect approximation and detailed coefficients. Then approximation part is encrypted using chaos encryption. After image encryption, the data hider will hide the secret data into the detailed coefficient which are reserved before encryption. The data hiding technique uses the adaptive LSB replacement algorithm for concealing the secret message bits into encrypted image. The proposed method can achieve real reversibility, that is, data extraction and image recovery are free of errors.

Keywords: Reversible, Data Concealment, Image Encryption.