Image information hiding technique based on frequency hopping and 2D-DWT

To deal with information security problem, an effective information hiding technique on the motivation of frequency hopping and 2D-DWT is proposed in this paper. By means of frequency hopping technique, images for hiding information are changed randomly as the time sequence of information bits according to the secret key by which randomicity and security can be improved. Experimental results show that the system on the basis of this technique is effect on hiding multiple information bits in different image without suspicion and the information can be safely extracted even if the images are subjected to normal image processing or malicious attacks.