The Enigma cipher machine, said to be unbreakable. Alan Turing had a pivotal role in cracking Enigma codes during WWII. Professor Brailsford takes us through just what Turing and his team were up against. Engima Part 2: https://www.youtube.com/watch?v=kj_7Jc1mS9k Professor Brailsford's notes: http://bit.ly/enigmapart2 158,962,555,217,826,360,000 – Numberphile: https://www.youtube.com/watch?v=G2_Q9FoD-oQ Flaw in the Enigma Code - Numberphile: https://www.youtube.com/watch?v=V4V2bpZlqx8 Punch Card Programming: https://www.youtube.com/watch?v=KG2M4ttzBnY Public Key Cryptography: https://www.youtube.com/watch?v=GSIDS_lvRv4 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