Francis Beaufort invented one of these that was used in the Hagelin M-209 machine.
Francis Beaufort invented one of these that was used in the Hagelin M-209 machine. An early digraphic one was invented by Charles Wheatstone. Johan Trithemius wrote a tract about the use of these that is seemingly a discourse on magic. Marian Rajewski using a cyclometer to analyze one in his Steganographia. Kasiski undermined one created by Vigenere in the 15th century. Thomas Phelippes managed to defeat one used by Anthony Babington while working on behalf of Francis Walsingham. Magic, Room 47, and Bletchly Park were all facilities dedicated to cracking them. For 10 points, name these constructs including Purple; Enigma; and, in modern times, RSA.
Francis Beaufort invented one of these that was used in the Hagelin M-209 machine.
{ciphers} (accept {cryptographs} or {secret codes} or close equivalents)