The History and Mystery of the World's Greatest Ciphers from Ancient Egypt to Online Secret Societies
Description
A mathematical tour of some of the greatest unsolved ciphers of all timeIn 1953, a man was found dead from cyanide poisoning near the Philadelphia airport with a picture of a Nazi aircraft in his wallet and an enciphered message taped to his abdomen. In 1912, a book dealer named Wilfrid Voynich came into possession of an illuminated cipher manu
