Abstract: Steganography is the art or practice of concealing a message, image, or file within another message, image, or file. It is the art and science of communicating in such a way that the presence of a message cannot be detected. Generally, the hidden messages will appear to be (or be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. In this paper we proposed steganography based on alpha channel.
Keywords: Steganography, Alpha channel, Data hiding.