High Quality and Data Protection Image Steganography using IWT and RSA

Abstract

Steganography is the learning of disciple communication maintaining the secrecy of the obscure information. The extent of secret information sibling to the size of the cover that can be concealed in the cover, without compensating to the quality of the envelope, is known as capacity. Security of a steganography system is protecting the hidden information from detection by an unauthorized user. It should be impossible to detect the hidden information for the third party, even if it is suspected. The more the information the cover carries the better. However, the large embedded information degrades the quality of the stego significantly. This means that when the quantity is expanded the security contraction and vice versa. Therefore, the efficient techniques are required to achieve the optimal capacity and the security. In this paper, new transform domain techniques are developed in image, audio and video steganography to achieve the maximum capacity with enhanced security. IWT and RSA algorithm are used in these types of steganography to improve the performance i.e. high PSNR, unity SSIM and low MSE. In image steganography, both the grayscale and the color image steganography are implemented considering the secret information as the image.