The flaw which allowed the Allies to break the Nazi Enigma code. More links & stuff in full description below ↓↓↓ First video explaining Enigma: https://www.youtube.com/watch?v=G2_Q9FoD-oQ Extra footage: https://www.youtube.com/watch?v=BdrrJ7qd4HA Brown papers on ebay: http://bit.ly/brownpapers Periodic Videos: null This video features Dr James Grime discussing Enigma, the Bombe and Alan Turing. James' "day job" is touring with the Enigma machine - he could even visit you - see more at http://enigma.maths.org/content/project-officer The maths of breaking the Enigma by James Grime http://enigma.maths.org/content/sites/enigma.maths.org/files/maths.pdf NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: null Other merchandise: https://store.dftba.com/collections/numberphile