The result was the polyalphabetic ciphers--a method which switched the encoding process of each letter throughout the message, so "A" might be replaced with "S" at one time and then with "R" later ...

Edgar Allan Poe was fascinated by ciphers, going so far as to create a story, The Gold Bug, centered around the solution to one.Less well known is an article Poe wrote for Graham's Magazine in ...

In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair," named for his friend Lyon Playfair, first Baron Playfair of St. Andrews, who popularized and promoted the cipher. Its ...

5. The Renaissance: The Vigenère Cipher. The Renaissance period saw the development of more sophisticated encryption techniques. One of the most famous ciphers from this era was the Vigenère cipher, ...

Far more sophisticated is the polyalphabetic cipher, which was first defined by Leon Battista Alberti in about 1467, although some argue it may have been developed by the Arab cryptologist Al ...

“This cipher was first submitted to the FBI Laboratory on November 13, 1969, but not successfully decrypted,” the statement continued. ... transposition, or polyalphabetic substitution ...

Part two used a periodic polyalphabetic substitution cipher using 8 alphabets. When decrypted, the passage hinted at something buried: It was totally invisible.

In 1969, the Zodiac killer sent a letter to the San Francisco Chronicle accompanied by a cipher. It took over 50 years to crack the code - and it finally has been.

Beaufort cipher would be the logical next step. It’s just as secure as Vigenere. The Beaufort cipher has the advantage that it is a self-inverse cipher, also called a reciprocal cipher ( https ...

L ate in the 1460s, Leon Battista Alberti wrote a book on ciphers. It was a dialogue between him and a longtime friend, Leonardo Dati, who had recently been made head of the papal secretariat. Like ...