Friday, October 18, 2013

German report on solution of M-209 cipher machine

Some time ago I received this request by mr Mark Blair:

‘DF-120 (TICOM 2794) makes reference to another document, TICOM 2795 "Determination of the Absolute Setting of the AM-1 (M-209) by Using Two Messages with Different Indicators".

Do you know if that document has been declassified, and if it is available anywhere?’
I recently stumbled upon the answer:

This is TICOM report DF-105 ‘Determination of the absolute setting of the AM-1 (M-209) by using two messages with different indicators’.

I don’t have this file but anyone can request it from the NSA’s FOIA office. If you do get it please share!

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