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steganography |
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steganographyHiding a message within an image, audio or video file. Used as an alternate to encryption, it takes advantage of unused bits within the file structure or bits that are mostly undetectable if altered. A steganographic message rides secretly to its destination, unlike encrypted messages, which although undecipherable without the decryption key, can be identified as encrypted. For a white paper on the subject written by Neil F. Johnson of George Mason University, visit www.jjtc.com/Steganography. See ScramDisk. steganography [‚steg·ə′näg·rə·fē] (computer science) The art and science of hiding a message in a medium, such as a digital picture or audio file, so as to defy detection.
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Steganography (hiding data in another file, such as an image) and watermarking research. Anybody, including mad bombers, can do steganography using software off a magazine cov er or the Net. If you saw the Morgan Freeman movie, Along Came a Spider, then you have an idea of just how steganography works. |
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