Friday, March 24, 2017

The Abwehr’s Enigma G cipher machine and Procedure 63

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The Cryptologia article Mr. Twinn’s bombes is available from the Taylor and Francis website and it has some very interesting information o...
3 comments:
Friday, March 17, 2017

TICOM D-69 ‘Correspondence between OKW/CHI and intercept stations’

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I’ve uploaded TICOM report D-69 ‘Correspondence between OKW/CHI and intercept stations’ (97 pages- dated February 1946). Enjoy!
Sunday, March 12, 2017

Update

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In the essay The Japanese TOKI diplomatic cipher 1943-45 I’ve added: The report SRH-361 ‘History of the Signal Security Agency Volume ...
Monday, March 6, 2017

NSA Special Research Histories available for download

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The following recently declassified Special Research Histories can be downloaded from the NSA website: SRH-361 ‘ History of the Signal ...
1 comment:
Wednesday, March 1, 2017

The Japanese TOKI diplomatic cipher 1943-45

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During WWII Japan’s Foreign Ministry used several cryptologic systems in order to protect its diplomatic communications from eavesdroppers....
2 comments:
Friday, February 24, 2017

Twitter Q&A with GCHQ historian

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The GCHQ historian has answered a series of questions on twitter
Tuesday, February 14, 2017

Interesting reports on the Soviet crypto problem

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Two new versions of the following reports can be found at the NSA’s website. American Cryptology During the Cold War 1945-1989, Book ...
1 comment:
Thursday, February 9, 2017

Breaking Enigma messages

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Frode Weierud and Olaf Ostwald have written the interesting article ‘ Modern breaking of Enigma cipher texts ’ on modern techniques used in...