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Pin-and-lug cipher machine
- Wanted item
The C-35 is the first fully mechanical pin-and-lug machine
developed by Boris Hagelin in Sweden.
It is much smaller than any of the later machines of the same class
and has five coding wheels. Furthermore, the lugs
on the metal bars of the cage are fixed and can not be moved.
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The C-35 was initially developed for the French Army,
who wanted the machine to fit the pocket of their trousers.
So they gave Boris Hagelin a piece of wood that would just fit
inside the pocket of an army uniform.
On 8 November 2008,
when we attended the presentation of the book
Mythos Enigma by Dominik Landwehr in Basel (Switzerland),
Hagelin's first employee Oskar Stürzinger presented some
machines from the private collection of Crypto AG.
The images of the C-35 shown on this page were taken that day.
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The C-35 has five pin-wheels, each with a different number of steps
and user-configurable pins. The number of pins on each wheel are 17, 19,
21, 23 and 25, which are all relative primes of 26. This gives a maximum
cipher period of 3,900,225.
The machine was generally painted blue and approx. 5000 units were sold
to the French Army in 1935 [2].
The C-35 was succeeded in 1936 by the improved, but larger,
C-36
that eventually evolved into the C-362
and finally the C-38.
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© Copyright 2009-2013, Paul Reuvers & Marc Simons. Last changed: Sunday, 15 April 2012 - 21:23 CET
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