The word \\\"steganography\\\" is derived from the Greek words steganos (covered) and graphein (to write), and it refers to the art of concealing the very existence of a secret message within another, seemingly innocuous message or object. Unlike cryptography, which scrambles data so its meaning is obscured, steganography secures data by obscuring its existence. Media files such as images and audio are ideal for steganographic transmission due to their often large size and inherent redundancy, which allows for subtle, imperceptible modifications. This report focuses on digital image steganography and audio steganography, detailing the core principle of using the Least Significant Bit (LSB) method to embed secret data, a technique widely used for its simplicity. The objective is to provide an overview of these techniques, their working principles, and their significance in covert communication. The report also acknowledges that steganography, while having legitimate uses, can also be employed for malicious purposes, necessitating continuous research in steganalysis.
Praveen et al. (Thu,) studied this question.