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The same image viewed by white, blue, green, and red lights reveals different hidden numbers. Steganography (/ ˌ s t ɛ ɡ ə ˈ n ɒ ɡ r ə f i / ⓘ STEG-ə-NOG-rə-fee) is the practice of representing information within another message or physical object, in such a manner that the presence of the concealed information would not be evident to an unsuspecting person's examination.
A hidden message is information that is not immediately noticeable, and that must be discovered or uncovered and interpreted before it can be known. Hidden messages include backwards audio messages, hidden visual messages and symbolic or cryptic codes such as a crossword or cipher. Although there are many legitimate examples of hidden messages ...
Secret Messages is the tenth studio album by Electric Light Orchestra (ELO), released in 1983 on Jet Records. It was the last ELO album with bass guitarist Kelly Groucutt, conductor Louis Clark and a full orchestra, and the last ELO album to be released on the Jet label. It was also the final ELO studio album to become a worldwide top 40 hit ...
Easter egg (media) An image that reveals an Easter egg when the hedgehog is clicked or tapped. Another Easter egg can be found in a tooltip when a mouse pointer is hovered over the hedgehog. [1] An Easter egg is a message, image, or feature hidden in software, a video game, a film, or another—usually electronic—medium.
Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. [1][2][3] In steganograhy, a message is concealed in the presentation of text, rather than its content. Baconian ciphers are categorized as both a substitution cipher (in plain code) and a concealment cipher (using the two ...
Hidden messages on a paper written in invisible ink. Hidden messages distributed, according to a certain rule or key, as smaller parts (e.g. words or letters) among other words of a less suspicious cover text. This particular form of steganography is called a null cipher. Messages written in Morse code on yarn and then knitted into a piece of ...
Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized:kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively [ 1 ]), is the practice and study of techniques for secure communication in the presence of adversarial behavior. [ 2 ]
In cryptography, the one-time pad (OTP) is an encryption technique that cannot be cracked, but requires the use of a single-use pre-shared key that is larger than or equal to the size of the message being sent. In this technique, a plaintext is paired with a random secret key (also referred to as a one-time pad).