"On This Date in History" Calendar
1846: Étienne Bazeries Birth Date
21 August 1846: Birthday of Étienne Bazeries, developer of the "cylindrical cipher device." His "Bazeries Cylinder" was an improved version of the Jefferson Cipher. It was later refined into the U.S. Army M-94 cipher device. Bazeries was referred to by historian David Kahn as "the great pragmatist of cryptology. His theoretical contributions are negligible, but he was one of the greatest natural cryptanalysts the science has seen." (Kahn, "The Codebreakers, 1996)
Take a look at various ciphers on our Information Assurance Exhibits page - link below.