An Efficient Steganography with Mosaic Images for Covert Communication

Abstract

Abstract:The main aim of the paper is to analyze about security in image transfer through the network. Secretfragment-visible mosaic image is proposed for combining small tiles of secret image to form a target in the sense of mosaic. When this artwork is viewed at close, the observer can view smaller elements, yet when viewed at a distance the collection of tiles blend together to yield the overall picture. When the mosaic generating process starts, original image is divided into many tiles. Before splitting the image, compare the image for mosaic creation. Mosaic image is created automatically by composing small fragments of a given image in to target image, achieving an effect of embedding the given source image secretly in the resulting mosaic image. To create the mosaic image, first find the similar target image for selected source image. Finding the best fit tile for embedding in the target image blocks. The information of placing the tile image fitting sequence in target image is embedding into random selected pixel in created mosaic image. The embedded information act as a text key file. The key file contains the tile image fitting sequence. Without this key receiver can't retrieve the secret image.