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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 ...
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 ...
Each sheet related to the starting position of the left (slowest-moving) rotor. The 26 × 26 matrix represented the 676 possible starting positions of the middle and right rotors and was duplicated horizontally and vertically: a–z, a–y. The sheets were punched with holes in the positions that would allow a "female" to occur.
In an extension of the same general principle, the M-138-A strip cipher machine, used by the US Army, Navy (as CSP-845), Coast Guard and State Department through World War II, featured hundreds of flat cardboard strips. Each strip contained a scrambled alphabet, repeated twice, that could be slid back and forth in a frame; with 30 being ...
Cipher disks had many small variations on the basic design. Instead of letters it would occasionally use combinations of numbers on the outer disk with each combination corresponding to a letter. To make the encryption especially hard to crack, the advanced cipher disk would only use combinations of two numbers.
The claim: Image shows Musk post saying Trump will ‘do anything I tell him to do’ A Nov. 17 Facebook post (direct link, archive link) includes an image of what appears to be an X post from ...
In the history of cryptography, a grille cipher was a technique for encrypting a plaintext by writing it onto a sheet of paper through a pierced sheet (of paper or cardboard or similar). The earliest known description is due to Jacopo Silvestri in 1526. [ 1 ]