Wednesday, November 27, 2013

More Seabourne reports available

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Randy Rezabek of TICOM archive has uploaded more Seabourne reports . The new ones cover cryptanalysis in the German AF, the OKW Radio Defe...
Monday, November 25, 2013

The German intercept station in Sofia, Bulgaria

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The German High Command’s deciphering department – OKW/Chi intercepted radio traffic from various stations both in Germany and abroad. ...

Update

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I have uploaded TICOM report DF-116-K ‘ The German intercept station in Sofia ’ - 1948, written by Wilhelm Flicke. Available from my ...
Tuesday, November 19, 2013

British report on German armor piercing projectiles

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The very interesting report ADM 213/951 ‘German steel armour piercing projectiles and theory of penetration’ is available from World of Tan...
Sunday, November 17, 2013

The unfortunate Henry W. Antheil and the State Departments strip cipher

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During WWII the high level cryptosystem used by the US State Department was the M-138-A strip cipher . Unfortunately for the Allies this s...
Saturday, November 16, 2013

Estonian signals intelligence service

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The signal intelligence agencies of small nations usually receive little to no attention from historians, mostly due to the lack of primar...
Thursday, November 14, 2013

The British railways code

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During WWII all the participants had some success in intercepting and decoding the radio traffic of enemy military units. Another type of tr...
Monday, November 11, 2013

Solution of prewar Polish diplomatic code by OKW/Chi

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In the field of signals intelligence and codebreaking Poland, despite being a small state, distinguished itself by being the first country...