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The ACA was formed on September 1, 1930. Initially the primary interest was in monoalphabetic substitution ciphers (also known as "single alphabet" or "Aristocrat" puzzles). This has since been extended to dozens of different systems, such as Playfair, autokey, transposition, and Vigenère ciphers.
June 30, 1999 The partially decomposed body of Ricky McCormick was discovered in a field in St. Charles County, Missouri on June 30, 1999. Sheriffs found two garbled hand-written notes – apparently written in secret code – in the victim's pockets, and these were handed over to the FBI for further investigation.
The Aristocrat Cipher is a type of monoalphabetic substitution cipher in which plaintext is replaced with ciphertext and encoded into assorted letters, numbers, and symbols based on a keyword. The formatting of these ciphers generally includes a title, letter frequency, keyword indicators, and the encoder's nom de plume . [ 1 ]
June 25 is the 176th day of the year (177th in leap years) in the Gregorian calendar; 189 days remain until the end of the year. Events. Pre-1600. 524 ...
This is a list of selected June 25 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit.
Gemini (May 21 - June 20) Your mind is buzzing today, Gemini, like a cat chasing a laser pointer. You’re curious about everything—new projects, random facts, maybe even how paper gets made (no ...
In mid-November 1938, the bombs were ready, and the reconstructing of daily keys now took about two hours. [5] Up to July 25, 1939, the Poles had been breaking Enigma messages for over six and a half years without telling their French and British allies. On December 15, 1938, two new rotors, IV and V, were introduced (three of the now five ...
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