In the late 18th century combination locks, known in Europe since 15th century, were popularized by Edmé Régnier L'Aîné, and versions of them with letters have been suggested to be the … See more

To encrypt a message, the encrypter rotates the disks to produce the plaintext message along one "row" of the stack of disks, and then selects another row as the ciphertext. To decrypt the message, the decrypter rotates the disks on his cylinder to produce the … See more

• Friedman, William F. (1918). Several Machine Ciphers and Methods for their Solution (PDF). Methods for the Solution of Ciphers, Publications 15–22. Riverbank Publications. … See more

The Bazeries cylinder was a relatively strong system at the time (compared to many other systems in use), and Etienne Bazeries, a French military cryptanalyst, is said to have regarded … See more