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 Matters magazine commented that the album transported Petit "to the next level". Legendary UK music journalist Charles Shaar Murray agreed, deeming the album Petit's "graduation piece". Writing for The Blues, Shaar Murray notes: "[Petit] rises to the challenge that most New Blues players are guitarists first, singers second and songwriters a distant, trailing third. Previous records established his credentials as guitar hero and ace blues geek, but now he’s found his voice." "Cracking The Code" received an 8/10 star review in Classic Rock as well as being listed as one the magazine's best albums of 2013. Hi-Fi News magazine awarded