MATLAB CODING FOR DATA HIDING

REVERSIBLE DATA HIDING IN ENCRYPTED IMAGES

STEGANOGRAPHY

        Steganography is the art of hiding a secret message behind the normal message. This is used to transfer some secret message to other person and no interim person will be able to know what the real message which you wanted to convey was. This art of hiding secret messages has been used for years in real life communications. Since the evolvement of digital communication, it has also been used in digital images.

            

Figure. operation of reversible data hiding is shown in the above image

                 Reversible data hiding is the technique used to hide a secret message in an encrypted image and retrieving it without any loss in the data. The image is encrypted and a binary data bit is embedded in the encrypted image and transmitted while at the receiving end using the key we can decrypt the image and retrieve the binary data.

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