Dr Enigma — How Turing and His Team Hacked Enigma (Turing Fest 2018)

Transcript

1. 
 Hacking Enigma
 
 how the Nazi codes 
 came to be cracked
 
 
 by
 
 Dr Mark Baldwin
 
 www.DrEnigma.org @HackingEnigma
3. Silicon Valley, 2018 1915 Guglielmo Marconi
5. ROTORS (3) BULBS (output) KEYS (input) PLUGS INDEX LETTERS
6. 3 rotors (from 5 or 8)
8. A single Enigma rotor could be wired up in 26! ways which is about 4.03 x 1026
10. A 3-rotor Enigma machine
 could be set up in 3,283,883,513,796,974,198,700,
 882,069,882,752,878,379,955,261,095,623, 685,444,055,315,226,006,433,615,627,409, 666,933,182,371,154,802,769,920,000,000, 000
 ways.
 i.e. approximately 3.28 x 10114
11. 3.28 x 10114 If everyone in the world tested one possible setting every 10 seconds, they would only test 2.5 x 1015 settings in a year.
13. Silicon Valley, 2018 1938
15. The Bombe
16. Bad practice! By the operators Non-random choice of rotor settings Non-random choice of key group Failure to re-set rotors after first message By the officers Formulaic opening or closing phrases
20. Bad practice! At higher level – by the administrators Few rotor wiring patterns used In early days, rotor order rarely changed Repetition in instructions (until May 1940) Incorrect compilation of settings books
21. 
 Hacking Enigma
 
 how the Nazi codes 
 came to be cracked
 
 
 by
 
 Dr Mark Baldwin
 
 www.DrEnigma.org @HackingEnigma