Vigenère Cipher
Vigenère cipher
The Vigenère cipher was created in the 16th-century by French cryptographer Blaise de Vigenère. It was revered as "le chiffre indéchiffrable" or "the unbreakable cipher" for many years after its invention.
It works by concealing the original plaintext with multiple different monoalphabetic substitution ciphers, known as polyalphabetics. In other words, it uses multiple cipher alphabets and shifts the by different amounts- based on the encryption key.
Blaise de Vigenère
https://www.britannica.com/topic/Vigenere-cipher
Britannica
16th Century
Gustavus J. Simmons
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English
Figure
Confederate Cipher Disk
Confederate Cipher Disk
The Confederate Cipher Disk was used in The American Civil War by the Confederate Army. Created by Francis LaBarre and based on the Vigenère Cipher, it consisted of two brass discs with the alphabet on each. As a mechanical cipher tool, it allowed the Confederate Army secured communication.
Francis LaBarre
https://www.cryptomuseum.com/crypto/usa/ccd/index.htm
Cyptomuseum
1861- 1865
Cryptomuseum
https://crypto.omeka.net/admin/items/show/4
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English
Replica