Although I’ve written essays about the most interesting
cases of cryptologic history, there are a few cases that I have not been able
to cover in detail.
Unfortunately in order to write about them I need access to
material from the NSA’s FOIA office or from the US and German archives.
If all goes well and I receive this material then I will be
able to write about the following cases:
The Air Ministry’s Research Department - Reichsluftfahrtministerium
Forschungsamt was one of the major intelligence organizations of Nazi Germany.
It was created by Hermann Goering as his personal
intelligence agency in 1933 and during the period 1933-45 the Forschungsamt
monitored telegram, mail and telephone traffic in Germany and also intercepted
and decoded foreign radio traffic.
Unfortunately we do not know many details about their
wartime work. ‘European Axis signals intelligence vol 1 - Synopsis’, p21-2 says
that no evidence of their cryptanalytic successes was found and that less than
1% of the FA’s personnel were interrogated.
Much later, in the early 1950’s, two TICOM reports on the Forschungsamt
were written by former members drs Kröger, Huppertsberg and Kurtzbach.
TICOM reports DF-240 and DF-241 should have interesting
information. If the NSA’s FOIA releases them I’ll be able to write a detailed
report on the operations of the Forschungsamt.
2). Japanese diplomatic cipher TOKI
In order to protect its diplomatic communications Japan’s
Foreign Ministry used several cryptologic systems during WWII. In 1939
cipher machine was introduced for the most important embassies,
however not all stations had this equipment so hand systems continued to play
an important role in the prewar period and during the war.
Both the Anglo-Americans and the Germans solved the J-19
FUJI code in the period 1941-43. In summer ’43 FUJI was replaced by three new
systems. The transposed codes TOKI and GEAM and the enciphered code ‘Cypher
TOKI was used in the period 1943-45 and it was similar to
J-19 in that it was a code transposed on a stencil. Just like its predecessor
it was solved by the Anglo-Americans and the German codebreakers. The US
designation was JBA and the designation in Pers Z files (decryption department
of the German Foreign Ministry) was JB-64.
If all goes well and I receive the relevant material I will
write an essay on TOKI.
The M-209 cipher machine was used in WWII by the US armed
forces as a medium level cryptostystem. I’ve given a summary of the German
solution of this device in The
American M-209 cipher machine however I’m going to be adding information in
I’m also waiting for some files from NARA. If I receive them
then they should contain a lot of new information.
4). Croat Enigma
I’ve already written about this case in German
codebreakers vs Enigma but this time I will write a more detailed essay
using the information contained in the war diary of Inspectorate 7/VI.
I’ve given a summary of German work on the Swiss diplomatic
Enigma cipher machine in German
codebreakers vs Enigma but this time I decided to investigate further so
I’ve copied more material from the archives.
Unfortunately that wasn’t enough and in order to write about
this case I will have to wait till the NSA’s FOIA office releases the relevant
files (TICOM reports I-31, DF-240, DF-241).
If the NSA’s FOIA
office releases more TICOM reports and if
they contain new information on the compromise of the State Department’s M-138-A
cipher then it might be possible to write more about this very interesting