Hybrid GEMD Data Hiding

The rising popularity of Internet provides convenience while also raising the risk of disclosure from the viewpoint of information security. In particular, steganography is a common way to safeguard information because it can be used to embed the secret data into the meaningful message and the attacker cannot find it out. In order to increase embedding capacity and maintain others desirable steganographic attributes, a hybrid GEMD(generalized exploiting modification direction) data hiding method will be proposed in this paper. According to our proposed method, the embedding capacity can be achieved 4bpp (under accepted stego image, i.e., the stego image’s quality also is better than 30dB). Moreover, there are three major contributions of this scheme. One, it does not change to the variable codes that eliminated additional communication, another is the number of projection vectors used no longer excessive and the other is no overflow/underflow problem exists. From our simulation results and performance discussion, we can prove that our method does not only to provide the improved embedding capacity but also to maintain good stego image quality.