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A Cardan grille is made from a sheet of fairly rigid paper or parchment, or from thin metal. The paper is ruled to represent lines of handwriting and rectangular areas are cut out at arbitrary intervals between these lines. An encipherer places the grille on a sheet of paper and writes his message in the rectangular apertures, some of which ...
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet .
Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. [1] [2] [3] 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 typefaces).
614. ISBN. 0-00-255944-7. Between Silk and Cyanide: A Codemaker's War 1941–1945 is a memoir of public interest by former Special Operations Executive (SOE) cryptographer Leo Marks, describing his work including memorable events, actions and omissions of his colleagues during the Second World War. It was first published in 1998.
The mystery starts in the 1880s, when someone wearing the dress tucked a coded message inside the secret pocket of what was considered a business-casual get-up. The paper was eventually forgotten ...
This "code" is one of many innocuous sounding secret codes that stores use to alert employees to problems without distracting you from shopping. We tracked down some current and former retail ...
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.
The new Spotify Codes feature creates a unique barcode and album cover image for every song, album, artist, and playlist. Scan these Spotify Codes with the new camera in the Spotify app’s search ...
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It’s an amazing resource for teachers & homeschoolers - Teaching Mama