Such a disguised message is considered to be an example ofsteganography, which is a sub-branch of general cryptography.
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Invisible ink is one form ofsteganography, and it has been used in espionage.
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However, acrostics may also be used as a form ofsteganography, where the author seeks to conceal the message rather than proclaim it.
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But whereassteganographyaims for imperceptibility to human senses, digital watermarking tries to control the robustness as top priority.
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In addition,steganographymay be used to hide information embedded within graphic files on websites.
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Another type of concealment is the hiding of messages in the text or on a book's pages by printing in code -- a form ofsteganography.
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Although it bears similarities to both traditional encryption andsteganography, it can not be classified under either category.
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Typical networksteganographymethods involve modification of the properties of a single network protocol.
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The puzzles focused heavily on data security, cryptography, andsteganography.
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The simple representation also lends itself tosteganography.
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These applications fall under the term inter-protocolsteganography.
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It would today be regarded as a simple form ofsteganography.
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This fact can be used insteganography, where an algorithm interprets a binary data file differently to reveal hidden content.
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Bothsteganographyand digital watermarking employ steganographic techniques to embed data covertly in noisy signals.
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In digitalsteganography, electronic communications may include steganographic coding inside of a transport layer, such as a document file, image file, program or protocol.
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