A Review on Different Image Steganography Techniques

In this era of Internet, many useful files are shared through internet. For this we need a secure system to protect our secret data from eavesdroppers. Two different technologies are used to make our information secure i.e. cryptography and steganography. In cryptography we do encryption of the secret message but we can’t hide the existence of the secret message. But in steganography we hide the existence of the secret message. Steganography is the art which help us to hide secret information in different multimedia files. As a result, unauthorized users are not able to see and recognize the hidden information. It is a science that manages a secret path for sending information secretly using different multimedia carrier like in image, text, audio and video file. This Paper includes image Steganography, its basic working and insertion techniques used in Image Steganography such as LSB, Chaotic, GLM, Parity checking and Interpolation. It also involves Steganography applications and a set of parameters to test the imperceptibility of an algorithm.