Study and Comparison of Digital Image Steganography

Steganography is the art of hiding the fact that communication is taking place, by the wrapping information in other information. Many different carrier file formats can be used, but digital images are the most popular because of their frequency on the Internet. For hiding secret information in images, there exists a large variety of steganography techniques some are more complex than others and all of them have respective strong and weak points. Different applications may require absolute invisibility of the secret information, while others require a large secret message to be hidden. This article intends to give an overview of image steganography, its uses and techniques. It also attempts to identify the requirements of a good steganography.