I’ve written
about the compromise of the French
War Ministry’s FLD code by the codebreakers of the German High Command's
deciphering department – OKW/Chi, however up to this point I hadn’t been able to
find the official designation of this cryptosystem.
Recently I’ve
discovered some clues that might clear things up.
According to
the available sources this cryptosystem was used for ‘the cypher traffic
between the French War Ministry and the army groups, armies and home
authorities’.
The new finding aid to the TICOM collection of the German Foreign
Ministry’s Political Archive has certain entries that read:
NR 3684 – ‘F4ZCUW 110’ German notes on the above French Defense Area
cipher
NR 3615 – F4ZCUT’ German notes, 1931, on French code as above, used
by the Defense Areas HQ’s from Schliersee.
The finding aid also mentions the French code F-90 which might have been the predecessor to F-110.
The French code F-110 is mentioned in one of Erich Huettenhain’s reports:
What was the
French designation for the system that the Germans called F-110?
Possibly Code R.A.
The finding
aid says:
NR 1736 – Code RA, French military code sheets and
instructions for use. Various dates 1933-39 March and July 1940-42 from Schliersee.
Why do I think that Code RA was used by the French War Ministry and the
Army Groups?
In the book ‘KODY WOJNY. Niemiecki
wywiad elektroniczny w latach 1907–1945’, p1.046 there is a copy of a French report dated 16 April 1940.
It says:
Un code R.A. avec additif et son
procede de surchiffrement (clef ZERO S.2.) pour permettre de correspondre a
l'Intérieur de la Métropole avec les Autorités et Etats-Majors dotés de ce
document (notamment commandants d' armes).
Google
translation:
R.A. a code with additive and process
for its super-encryption (key ZERO S.2.) To allow a match the interior of the
metropolis with the authorities and with staffs of this document (including
commanders of weapons).
I hope my
friends in France will look into this case. I can’t solve everything by myself!
I had a look at the translation. My try :
ReplyDelete"A R.A. code with additive and its super-encipherment process (key ZERO S.2.) to allow communications within the mainland with the authorities and military staffs provided with this document (especially commanders of garrisons)."
Commandant d'armes is a function of commanding a garrison (garrison itself in its old sense, as meaning a geographical area including troops and military facilities).
Thanks.
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