American Civil War cipher reel. Cipher key used by Confederate forces during the American Civil War (1861-1865) to encrypt messages. This is a Vigenere cipher,a form of poyalphabetic substitution that uses a keyword as the encryption key. This cipher was captured at Richmond,Virginia,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Library of Congress |
Taille de l’image : | 5150 px × 3739 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |