Classification of Image Steganography in Substitution Technique

Abstract

The science of communicating secret data using multimedia cover like audio, image, video files, etc. is called steganography. The technique steganography is used for hiding a secret data from unauthorized access or user. Steganography technique can be implemented using many different file formats, or in other words we can use different file formats as cover media but here we would talk about Digital Image-based Steganography for its obvious advantages. Also, we know that rapid and unimaginable developments in digital image processing methods make researcher work even more harder to achieve the ultimate objectives of steganography like robustness, security, resistance to different attacks, and payload capacity. The steganography method also confirms that the methodology or technique also increases the quality of the stego image keeping secure the secret data. The quality measures are PSNR and MSE. Through the following paper, we will study various states of art methods for steganography and compare the same so that it would be a great and ready reference material for the research scholars who are working on Digital Image Steganography.