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Hidden messages
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Subliminal messages
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| Audio |
- Backmasking
- Reverse speech
- Spectrogram
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| Numeric |
- Numerology
- Theomatics
- Bible code
- Cryptography
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| Visual |
- Fnord
- Paranoiac-critical method
- Pareidolia
- Psychorama
- Sacred geometry
- Steganography
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| See also: |
- Anagram
- Apophenia
- Easter egg (media)
- Clustering illusion
- Observer-expectancy effect
- Pattern recognition (psychology)
- Paradox
- Palindrome
- Unconscious mind
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v • d • e
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Steganography is the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message, a form of security through obscurity. The word steganography is of Greek origin and means "concealed writing". The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography disguised as a book on magic. Generally, messages will appear to be something else: images, articles, shopping lists, or some other covertext and, classically, the hidden message may be in invisible ink between the visible lines of a private letter.The advantage of steganography, over cryptography alone, is that messages do not attract attention to themselves. Plainly visible encrypted messages—no matter how unbreakable—will arouse suspicion, and may in themselves be incriminating in countries where encryption is illegal.[1] Therefore, whereas cryptography protects the contents of a message, steganography can be said to protect both messages and communicating parties. |
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