Books about Ciphers
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Mathematical Recreations and Essays
W. W. Rouse Ball
1478 downloads
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Elementary cryptanalysis
Helen Fouché Gaines
1266 downloads
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Manual for the Solution of Military Ciphers
Parker Hitt
936 downloads
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La Cryptographie, ou, l'art d'écrire en chiffres (French)
P. L. Jacob
502 downloads
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Displaying results 1–4