Saturday, March 31, 2018

The IBM Codatype cipher machine

›
In the files of the NSA’s Friedman collection there is a report by William F. Friedman , dated September 1937, which deals with a cipher mac...
2 comments:
Tuesday, March 27, 2018

Essay by Frode Weierud on Inspectorate 7/VI cryptanalyst

›
Who was Harry Welsch?
Monday, March 26, 2018

The Carlson-Goldsberry report - Compromise of State Department communications by the Finnish codebreakers in WWII

›
During WWII the US State Department used several cryptosystems in order to protect its radio communications from the Axis powers. For low le...
1 comment:
Tuesday, March 6, 2018

Bye bye mr Hayashi

›
In 2017 I tried to locate a file in the US national archives called ‘ Interrogation of mr Hayashi ’.  According to the NSA FOIA office i...
1 comment:
Saturday, February 24, 2018

Coldspur’s website

›
I’ve added a link to Tony Percy’s website coldspur.com
Tuesday, February 20, 2018

Radio War Nerd interview of Yasha Levine

›
Interview of Yasha Levine (author of Surveillance Valley: The Secret Military History of the Internet ) by Mark Ames and John Dolan (The War...
Monday, February 19, 2018

Candle in the Dark: COMINT and Soviet Industrial Secrets, 1946-1956

›
The study ‘ Candle in the Dark: COMINT and Soviet Industrial Secrets, 1946-1956 ’ by Carol B. Davis is available for download from the NSA w...
Saturday, February 17, 2018

To err is human vol 4

›
In my essay Rommel’s microwave link I had mentioned that a German speech cipher system was used on a microwave link connecting the German h...