Digital Image Steganography

The word steganography is originated from the Greek Language meaning “Covered Writing".  Digital Image Steganography is the act of hiding a secret message within a larger one in a way that other people can not recognize the contents of the hidden message. For example, a message might be hidden within an image by changing the least significant bits to be the message bits.  

Steganography is a science that has various useful applications.  It deals with communicating secret data in image, audio, or video files.  It comes under the assumption that if the feature is visible, the focus to attack is apparent.  Therefore the goal is to always conceal the existence of embedded data.  Steganography's ultimate objectives are undetectability, and capacity of the hidden data.  Steganography is used in various useful applications, such as: copyright control of materials, enhancing image search engines and smart IDs.  Similar to any other science, steganography can also be used for bad intentions.


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