CryptoCellar Tales

Sunday, 25 March 2018

Who was Harry Welsch?

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I know very little about Harry Welsch but what I know makes me curious and eager to know more. During the Second World War Harry Welsch wor...
2 comments:
Sunday, 5 February 2017

Modern breaking of Enigma ciphertexts

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The title on this posting is also the title of my latest Cryptologia article co-authored with Olaf Ostwald. The purpose is of course to giv...
Wednesday, 20 April 2016

The Secrets of the Lorenz Schlüsselzusatz SZ42

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The Secrets of the Lorenz Schlüsselzusatz SZ42 is a Web page that I have dedicated for information about the German teleprinter cipher m...
7 comments:
Saturday, 5 March 2016

Die Arbeiter, die die Enigma bauten

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Message for English Readers: This article is an attempt to make the history of the workers who built the Enigma more accessible to German ...
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About Me

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Frode Weierud
Oslo, Norway
I am a retired electronics engineer previously employed at CERN in Geneva, Switzerland. I have had a lifelong interest in cryptology and its history, with special emphasis on WW2 cryptology and codebreaking. The history of the Enigma is one of my pet projects. Licensed as a radio amateur with call sign LA2RL since 1967.
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