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Leibniz As Cryptographer, Spring 2013 @ Pitt Special Collections: Multimedia

Displays the cryptography machine that Leibniz developed in the 1670's, together with related scholarly material, such as Nicholas Rescher's book on Leibniz as cryptographer and historical documents.

Machine Mechanical Functioning

The accompanying graphic shows how the central innovation of the ciphering machine, the stepped drum, functioned.