Steganography is the art of hiding the fact that communication is taking place, by hiding information in other information. Different types of carrier file formats can be used, but digital images are the most popular ones 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. Many applications may require absolute invisibility of the secret information. This paper intends to give an overview of image steganography, it's usage and techniques, basically, to store the confidential information within images such as details of working strategy, secret missions, criminal and confidential information in various organizations that work for the national security such as army, police, FBI, secret service etc. We develop a desktop application that incorporates Advanced Encryption Standard for encryption of the original message, and Spatially Desynchronized Steganography Algorithm for hiding the text file inside the image.