Read any book on the history in question - it's no secret that the Poles were responsible for working out the details of the Enigma machines and how to break th

Read any book on the history in question - it's no secret that the Poles were responsible for working out the details of the Enigma machines and how to break them. The British took their work and developed it into methods that were more general & powerful. Wikipedia is a good as place to start as any - follow the references: http://en.wikipedia.org/wiki/Cryptanalysis_of_the_Enigma http://en.wikipedia.org/wiki/Cryptanalysis_of_the_Enigma.