Interesting paper about a German cryptanalysis machine that helped break the US M-209 mechanical ciphering machine.
The paper contains a good description of how the M-209 works.
—————
Free Unlimited, Encrypted, Anti Snoop & Ad Free Email
Boost Aviation Internet Speeds – Cuts tracking and Junk at source
Register UK names for just £2.99 a year
Check our Premium Domains and Freebies