Binary Text-Image Steganography

Abstract – Unlike encryption, steganography hides the very existence of secret information rather than hiding its meaning only. Image based steganography is the most common system used since digital images are widely used over the Internet and Web. The main aim of steganography is to increase the steganographic capacity and enhance the imperceptibility or undetectability. However, steganographic capacity and imperceptibility are at odds with each other. In addition, there is a tradeoff between both steganographic capacity and stego image quality. Hiding more data in cover images (higher capacity) introduces more artefacts into cover images and then increases the perceptibility of hidden data. Furthermore, it is not possible to simultaneously maximize the security and capacity of a steganographic system. Therefore, increasing steganographic capacity and enhancing stego image quality are still challenges