Multistage Three Layers Image Steganography Using LSB with Enhanced Security

Now-a-days a fast growth of internet in the present world, social networking websites like Twitter& Facebook are being increasingly used by individuals of all over the world to share their life activities and events via images. But this vastly popular observable fact of image sharing on internet is exposed to a lot of risks. At present, these social networking websites are not bounded by stringent privacy and copyright laws. Thus original image, once shared, could be easily downloaded and edited by the miscreants. For Secret data, Image Steganography is the science that provides communication of secret data in an appropriate multimedia carrier, e.g., image. It comes under the assumption that if the feature is visible, the point of attack is evident, therefore the goal here is always to conceal the very existence of the embedded data. This work is concerned with implementing Steganography for images, with an improvement in security and image quality. This paper presents a novel technique for image steganography based on three layers Image Steganography & Least significant bit (LSB) of each of the pixel's intensity of cover image. In addition with LSB and three layers the secret image is converted into text so that no one can understand the message and then this text is embedded in cover image. The experimental result shows that the our methodology has a high capacity and a good invisibility with security. The experimental results showed that the anti-detection robustness of image steganography combined with preprocessing of two stage scheme is found much better than the way using LSB steganography algorithms directly. To improve the robustness of steganography, The proposed method shows good enhancement to Least Significant Bit technique in consideration to security as well as image quality. Keywords-Steganography, LSB, Multi Layer Steganography, Encoding.