A high payload edge detection-based image steganography robust to RS-attack by using LSB substitution and pixel value differencing

Abstract

Among current information hiding methods, the least significant bits (LSBs) substitution is the most common. By modifying the least significant bit that has no effect on the image, secret information can be hidden in image media and cannot be perceived by the human visual system, making information transmission via the Internet more secure. Not all blocks in the image have the ability to carry secret messages of the same length and high confidence. Also, success can be achieved by hiding more secret information in complex areas of the image. This research proposes a hybrid steganographic method by using LSB substitution and pixel-value differencing (PVD) to increase the embedding capacity for the digital image. Moreover, the proposed method can effectively resist an RS detection attack and effectively improve the security of transmitting secret messages.