Technical steganography

(1) The method of concealing the existence of a message or data within seemingly innocent covers. (2) A technology used to embed information in audio and graphical material. The audio and graphical materials appear unaltered until a steganography tool is used to reveal the hidden message. The act of embedding messages within another message, commonly used within an image or a WAV file.
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A method of steganography that uses a special ink that is colorless and invisible until treated by a chemical, heat, or special light. It is sometimes referred to as sympathetic ink.
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An overlaid image that is invisible to the naked eye, but which can be detected algorithmically. There are two different types of invisible watermarks: fragile and robust.
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A substitution method of steganography where the right most bit in a binary notation is replaced with a bit from the embedded message. This method provides “security through obscurity,” a technique that can be rendered useless if an attacker knows the technique is being used.
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The method of steganography where a secret is embedded in a harmless message. See also jargon code.
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