I have been watching Mind of a Codebreaker - video instead of blogging. I should be ashamed of myself, but I am not. It is a fascinating story about how the British broke the German codes. Ultimately it is also the story of the World's First Programmable Electronic Computer. It had 1,500 valves. What we in America call tubes. An amazing story. If you have the time and bandwidth well worth it. I have studied this subject from a number of different aspects over the years since I first read a book called The Ultra Secretand I must say this is one of the best technical expositions of the Enigma story I have yet come in contact with. The part about "cribs" is very interesting. Until I read a book on Enigma technology a few years back I had never seen a good explanation of "cribs". The video covers the essence of "cribbing" very well.