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Beale ciphers. The Beale ciphers are a set of three ciphertexts, one of which allegedly states the location of a buried treasure of gold, silver and jewels estimated to be worth over 43 million US dollars as of January 2018. Comprising three ciphertexts, the first (unsolved) text describes the location, the second (solved) ciphertext accounts ...
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 information is not evident to human inspection.
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The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid. The example key shows one way the letters can be assigned to the grid.
X. Y. Z. The tap code, sometimes called the knock code, is a way to encode text messages on a letter-by-letter basis in a very simple way. The message is transmitted using a series of tap sounds, hence its name. [1] The tap code has been commonly used by prisoners to communicate with each other. The method of communicating is usually by tapping ...
Braille ASCII (or more formally The North American Braille ASCII Code, also known as SimBraille) is a subset of the ASCII character set which uses 64 of the printable ASCII characters to represent all possible dot combinations in six-dot braille. It was developed around 1969 and, despite originally being known as North American Braille ASCII ...
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Secret Service code name. President John F. Kennedy, codename "Lancer" with First Lady Jacqueline Kennedy, codename "Lace". The United States Secret Service uses code names for U.S. presidents, first ladies, and other prominent persons and locations. [1] The use of such names was originally for security purposes and dates to a time when ...