Cryptography
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
Collections:
Religious Studies, Education, Psychology, History, Literature, Philosophy, Entire Library
...have written in ciphers, including Julius Caesar, Charlemagne, Alfred the Great, Mary Queen of Scots, and Louis XIV. Francis Bacons celebrated biliteral cipher (1605) was an arrangement of the letters a and b in five-letter combinations, each representing...