German Cryptanalysis of the M-209
This 1947 document describes a German machine to cryptanalyze the American M-209 mechanical encryption machine. I can’t figure out anything about how it works.
EDITED TO ADD (5/14): German attacks on the M-209.
Posted on May 12, 2015 at 4:13 PM •
Sidebar photo of Bruce Schneier by Joe MacInnis.