05-05-2012, 03:30 PM
IMAGE & AUDIO STEGANOGRAPHY USING LSB INSERTION TECHNIQUE
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INTRODUCTION
Steganography derives from the Greek word steganos, meaning covered or secret, and graphy (writing or drawing). On the simplest level, steganography is hidden writing, whether it consists of invisible ink on paper or copyright information hidden in an audio file.
Where cryptography scrambles a message into a code to obscure its meaning, steganography hides the message entirely. These two secret communication technologies can be used separately or together—for example, by first encrypting a message, then hiding it in another file for transmission. As the world becomes more anxious about the use of any secret communication, and as regulations are created by governments to limit uses of encryption, steganography’s role is gaining prominence.
Objectives of the Project
The project titled “IMAGE AND AUDIO STEGANOGRAPHY using LSB insertion technique” has been initialed with the object of providing user- friendly software that enables us to hide data with in other data. Image and audio steganography is the art and science of communicating in a way which hides the existence of the communication, which is the art of hiding information in ways that prevent the detection of hidden messages. The goal of the project is to hide messages inside image, audio and video files in a way that does not allow any enemy to detect that there is a secret message present. The most basic advantage of Image and Audio Steganography is that it is very difficult to detect hidden messages through the human eyes.
Where Hidden Data hides?
It is possible to alter graphic or sound files slightly without losing their overall viability for the viewer and listener. With audio, you can use bits of file that contain sound not audible to the human ear. With graphic images, you can remove redundant bits of color from the image and still produce a picture that looks intact to human eye and is difficult to discern from its original.