Hiding Information as Main Content Use a Referential Method

Problems of detect ability and capacity are two major challenges of steganography. Traditional methods often hide secret message in least significant bits which can cause low capacity. The secret bits may be ignored by men but detectable for machines. This paper introduced a referential method which needs no cover image. In this method, secret message is ciphered using a cipher graph and written to an empty graph to form a figure. The method provides good concealment to both the secret message and the existence of the secret message. The capacity of the method is bigger than many traditional stego methods too.