Digital watermarking is the processing of combined information into a digital signal. A watermark is a secondary image, which is overlaid on the host image, and provides a means of protecting the image. It acts as a digital signature, giving the image a sense of ownership or authenticity. Digital watermarking technique is very impressive for image authentication or protection for attacks. This paper proposes a separable reversible data hiding in encrypted image. In the proposed scheme, the original image is encrypted using an encryption key and the additional data are embedded into the encrypted image using data-hiding key. With an encrypted image containing additional data, if the receiver has only the data-hiding key, he can extract the additional data though receiver does not know the image content. If receiver has only the encryption key, he can decrypt the received data to obtain an image similar to the original one, but cannot extract the embedded additional data. The proposed work is supported on the GUI model which gives a practical implementation of the work. The work is implemented on the MATLAB software and different aspects have been considered. The proposed method is cost effective, highly authentic, flexible and reliable.Keywords:Digital watermark, steganography, authentication, frequency domain, spatial domain, least significant bit,GUICite this Article SanjanaTanwar. A Gui Model for the Encryption and Decryption of an Image.Recent Trends in Electronics & Communication Systems. 2015; 2(3): 47–54p.
