Improve Steganalysis by MWM Feature Selection

Steganography is the art of invisible communication. It is derived from the ancient Greece thousands of years ago (Johnson & Jajodia, 1998; Kahn, 1996), and grow rapidly in the past few years along with the development of digital technology and the internet. Modern steganography has been widely used in various scenarios such as secret communication, digital rights management, data temper detection and recovery, etc (Provos & Honeyman, 2003). The main goal of modern steganography is to hide some secret messages into the socalled cover data, e.g. images, videos, audios, documents..., which produced the so-called stego data, and make the existence of the hidden messages unnoticeable to everyone expect the prospective receiver (Provos, 2001; Fridrich & Goljan, 2002; Fridrich, 2005). Usually an embedding key is also involved in the steganography scheme to provide security. The malicious can never tamper, remove, nor obtain the secret messages in the stego data, as long as the embedding key is kept unknown.