History of cryptography
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Cryptography, the use of codes and ciphers, began thousands of years ago. Until recent decades, it has been the story of what might be called classical cryptography — that is, of methods of encryption
The Enigma machine was widely used by Nazi Germany; its cryptanalysis by the Allies provided vital Ultra intelligence.
SIGABA
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In the history of cryptography, the ECM Mark II was a cipher machine used by the United States for message encryption from World War II until the 1950s. The machine was also known as the SIGABA or Con
SIGABA cipher machine at the National Cryptologic Museum, with removable rotor assembly on top
SIGABA
The rotors (wheels) and rotor unit
Top view of SIGABA showing rotor assembly and Controller switch