An Enhanced Reversible Data Hiding Technique for Coloured Images

To maintain image contents confidentiality and to recover original image, there is a need of Reversible Data Hiding scheme. This paper proposes an enhanced reversible data hiding technique for the coloured image. All previous methods embed data by reversibly vacating room from the encrypted images, which may be subject to some errors on data extraction or image restoration. The proposed method embeds data by reserving room before encryption with a traditional RDH algorithm. It is easy for the data hider to reversibly embed data in the encrypted image. This paper also concerns with a method that embeds the data invisibly into an image. The transmission and exchange of image also needs a high security. To achieve a security, Visual Cryptography is used. Visual cryptography maintains security of a cover media and also it will not make a use of encryption key. Hence, it is less prone to attack. The proposed method can achieve real reversibility, that is, data extraction and image recovery are free of any error