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PostPosted: Sun Sep 10, 2017 7:21 pm 
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http://www.rutherfordjournal.org/article010106.html

Big article on the German armed forces' three different types of teleprinter cipher machines during the Second World War, plus how Bletchley Park, the Swedes and the US attacked their encryption...

I may have posted this link before, but it is thought-provoking.

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PostPosted: Sun Sep 10, 2017 7:49 pm 
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It is a very interesting article that unfortunately make very little reference to the real genious behind the Swedish breaking of the T52, Arne Beurling.
https://en.m.wikipedia.org/wiki/Arne_Beurling

Beurling was a mathematics professor that was quickly enlisted by military intelligence (having offered his services when the war first broke out) to try and break the encryption.
Being somewhat eccentric in nature Beurling equally quickly locked himself in his chambers for two weeks then stormed out with the solution in hand, having figured it out just by use of pen and paper and a number of intercepted messages.

He then instructed Ericsson engineers in how the machine worked so they could build functional replicas and decipher the German traffic en masse. An amazing achievement the importance of which can't be overstated.
300,000 messages were decrypted before the Germans clued in and changed machines.

Beurling refused to say - or confirm - exactly how he solved the puzzle to anyone, saying that a magician shouldn't reveal the secrets behind his tricks.

He certainly had one of the sharpest mathematical minds Sweden has ever produced, perhaps one of the sharpest in the world.

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