Cryptanalysis of the Enigma Bletchley Park to describe the network that used the same Enigma setting sheets. Initially these were recorded using coloured pencils and were given the names "red", "light blue" etc., and later the names of birds such as "kestrel". During World War II the settings for most networks lasted for 24 hours, although towards the end of the war, some were changed more frequently. The sheets had columns specifying, for each day of the month, the rotors to be used and their positions, the ring positions and the plugboard connections. For security, the dates were in reverse chronological order down the
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