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Published on 10 Jan 2013 | over 3 years ago

The Nazi's Enigma Machine - and the mathematics behind it - was a crucial part of World War II. Flaw video at: www.youtube.com/watch

Brown papers on ebay: bit.ly/brownpapers

Dr James Grime demonstrates the machine and discusses its many configurations.

James' "day job" is touring with the Enigma machine - he could even visit you - see more at enigma.maths.org/content/project-officer

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