Data Hiding and Extraction Using a Novel Reversible Method for Encrypted Image

Encryption is an effective and popular means of privacy protection. Reversible (lossless) data embedding (hiding) has drawn lots of interest recently. Being reversible, the original cover content can be completely restored. This paper proposes a novel reversible data hiding scheme with a lower computational complexity and can be used in applications where both the image and the hidden information is highly confidential. This work presents a new method that combines cryptography and steganography technique for data hiding and safe image transmission purpose. In order to securely share a secret image with other person, a content owner may encrypt the image before transmission. This work proposes a novel scheme for separable reversible data hiding in encrypted image. The content owner encrypts the original uncompressed image using an encryption key. Then, a data-hider may embed the additional data in encrypted image; data will be encrypted before embedding it ensures security over the hidden data.