sci.crypt archive
Re: Another Site with FIALKA Pictures
Date: Fri Dec 09 2005 - 08:49:29 CET
On 8 Dec 2005 01:17:24 -0800, spam@hut-six.co.uk wrote, in part:
>John Savard wrote:
>> gives pictures of a FIALKA with the German/Russian keyboard without a
>> missing key...
>Another Fialka site:
The extended manual for the FIALKA on that site is very interesting, and
answers all my questions!
It turns out that the symbol with three transistors in a circle on the
original site from which I heard about the FIALKA did represent what I
thought it might - called the "Magic" circuit, it permutes three signals
around in a circle.
And one other wire is used to cause a letter to be enciphered as itself.
Thus, the machine is not perfectly reciprocal, and each letter may
become all thirty other possibilities - so the weaknesses of an
Enigma-like design are eliminated, while still retaining the advantage
of having the current flow through the rotors twice.
John Savard
http://home.ecn.ab.ca/~jsavard/index.html
http://www.quadibloc.com/index.html
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Received on Sun Dec 11 14:26:27 2005