How I Broke The Confederate Code (137 Years Too Late)
Mar 23, 2010
from 03:00 PM to 04:00 PM
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We study a previously undeciphered Civil War cryptogram, limiting ourselves to pencil and paper, and discover not only a missive of military importance, but in the process identify a new Confederate codeword. Our methods rely not only upon cryptanalysis of the encryption method but also on the exploitation of an elementary mistake.