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A disk cipher device of the Jefferson type from the 2nd quarter of the 19th century in the National Cryptologic Museum. The Jefferson disk, also called the Bazeries cylinder or wheel cypher, [1] was a cipher system commonly attributed to Thomas Jefferson that uses a set of wheels or disks, each with letters of the alphabet arranged around their edge in an order, which is different for each ...
A metal cipher disk Reconstruction of an Aeneas cipher disk, 5th century BC, Thessaloniki Science Center and Technology Museum. A cipher disk is an enciphering and deciphering tool developed in 1470 by the Italian architect and author Leon Battista Alberti.
The Schlüsselgerät 39 (SG-39) was an electrically operated rotor cipher machine, invented by the German Fritz Menzer during World War II.The device was the evolution of the Enigma rotors coupled with three Hagelin pin wheels to provide variable stepping of the rotors.
The Alberti Cipher disk. The Alberti Cipher, created in 1467 by Italian architect Leon Battista Alberti, was one of the first polyalphabetic ciphers. [1] In the opening pages of his treatise De componendis cifris [] he explained how his conversation with the papal secretary Leonardo Dati about a recently developed movable type printing press led to the development of his cipher wheel.
A wheel cipher being used to encode the phrase "ATTACK AT DAWN." One possible ciphertext is "CMWD SMXX KEIL." The principle upon which the M-94/CSP-488 is based was first invented by Thomas Jefferson in 1795 in his "wheel cypher" but did not become well known, and was independently invented by Etienne Bazeries a century later.
Owen's Cipher wheel. Owen's book Sir Francis Bacon's Cipher Story (1893-5) stated that Queen Elizabeth I was secretly married to Robert Dudley, Earl of Leicester, who fathered both Bacon and Robert Devereux, 2nd Earl of Essex, later ruthlessly executed by his own mother. [5] This was the basis for what became known as Prince Tudor theory. This ...
Copiale cipher: Solved in 2011 1843 "The Gold-Bug" cryptogram by Edgar Allan Poe: Solved (solution given within the short story) 1882 Debosnys cipher: Unsolved 1885 Beale ciphers: Partially solved (1 out of the 3 ciphertexts solved between 1845 and 1885) 1897 Dorabella Cipher: Unsolved 1903 "The Adventure of the Dancing Men" code by Arthur ...
The Lorenz SZ machines had 12 wheels each with a different number of cams (or "pins") The SZ machines were 12-wheel rotor cipher machines which implemented a Vernam stream cipher. They were attached in-line to standard Lorenz teleprinters. The message characters were encoded in the 5-bit International Telegraph Alphabet No. 2 (ITA2).