Cryptanalysis of the Enigma immense problem and it gave a great deal of trouble. Work on a high speed machine had been started by Wynn-Williams of the TRE late in 1941 and some nine months later Harold Keen of BTM started work independently. Early in 1942, Bletchley Park were a long way from possessing a high speed machine of any sort. Eventually, after a long period of being unable to decipher U-boat messages, a source of cribs was found. This was the Kurzsignale (short signals), a code which the German navy used to minimize the duration of transmissions, thereby reducing the risk of being
Cracking The Code Guitarist Mick Taylor and jazz trombonist Chris Barber also appear on the album and have been long-term collaborators with Petit since their involvement in his successful campaign to "Save The 100 Club" in December 2010. Their contributions were recorded at Petit’s home studio in late 2012. Mick Taylor spoke of "Cracking The Code" to "Guitar & Bass Magazine": "I went to see Bill Wyman’s Rhythm Kings and when I went to meet Bill backstage there were a few guitar fanatics there. A few of them said "we really enjoyed your playing on the Stephen Dale Petit album" it was nice