A novel steganographic technique for transferring image file without stego file by using shuffled absolute differential vectors of image

摘要

Cryptography and Steganography are the areas of research in the field of information security [1]. Steganography is the technique of hiding information into the cover file via. text, audio, video or image without causing statistically significant modification to the cover file. The purpose of the steganography to hide the existence of the information from the attacker [2], [3]. While embedding information in an image, a better balance is required in between the increasing embedding capacity and in reducing the stego-image distortion quality. In this proposed work, neither single bit of data was embedded in the picture nor the cover file was transmitted on the channel. Only the zig-zag image generated with the help of differential vectors is transmitted on the channel. The cover file is there with the data repository at both sender and receiver side. Hence, there is no change to identify the bits embedded on the cover image. At the destination end by using differential vector image and the cover image from the repository, the whole secret image was reconstructed. As there is no single bit of data was embedded in the cover image even a powerful steganalysis technique cannot be able to determine the steganographic process.