Just how did the team at Bletchley Park tackle the problem of decoding Enigma? In Part Two of our series on "The Real" Imitation Game, Professor Brailsford explains how they did it. Part One of this series: Turing's Enigma Problem: https://www.youtube.com/watch?v=d2NWPG2gB_A Professor Brailsford's notes: http://bit.ly/enigmapart2 Numberphile on Enigma: https://www.youtube.com/watch?v=G2_Q9FoD-oQ History of Undecidability:    • The History of Undecidability   Mainframes and the Unix Revolution: https://www.youtube.com/watch?v=-rPPqm44xLs Turing Machines Explained: https://www.youtube.com/watch?v=dNRDvLACg5Q EXTRA BITS - Banburismus Secret: https://www.youtube.com/watch?v=f16iwjntggc http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels