Digital Steganography is the art of hiding messages within the lowest bits of noisy images or sound files. More that 800 digital steganography applicatiosn have been found by the Steganography Analysis and Research Center. In many file formats, some data is unimportant, therefore the hidden messages do not cause notable variation within the file. Digital Steganography
is used in sound, graphic, HTML, video, and text files. Image files are the most popular form of Digital Steganography and are referred to as stego-image.
Digital Steganography can be used by people who are being censored by government agencies and can also be used by criminals. It has been said that Digital Steganography was used by al-Qaeda in their planning of the September 11th attacks. Legal ways to use Digital Steganography are called watermarks used for copyright protection.
For more information on Digital Image Steganography click here or here.
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