Data embedding technique using secret fragment visible mosaic image for covered communication

A novel method is implemented based on information hiding for secure data communication. A new computer art image creates called secret fragment visible mosaic image. The Mosaic image is formed by the design of composing small fragments of a given secret image and selected target image, which appears in an arbitrarily selected target image and use of hiding of the secret image. Secret image and target image is divided into small fragments called tile image and target block respectively. Tile image is embedded in a similar target block based on color variation. Each tile image is transforming their color characteristic to corresponding target blocks using color transform algorithm so that the secret image may be retrieved nearly lossless. Secret image and target image are variable size, then resizing the target image. Customize metafile (CMF) contains the required information for retrieving the secret image. The text message is embedded into the border using the TBPC method. Calculate the hash value of generated the mosaic image. MD 5 hash algorithm is used to compute hash value, which provides integrity of secret data. The proposed method is possible for large volume and variable size of the secret image and target image. This method is feasible for secure and nearly lossless data embedding technique.