Nyorai kupfuurira kweiyi ndima - PaBletchley Park akashanda pa cryptanalysis yeEnigma ciphers kusvikira parufu rwake muna 1943. Akavaka chikwata ndokuwana mutoo wakaputsa Enigma yeItaly Naval, achigadzira ruzivo rwunonzi rwakaunza kukunda kweAllied paHondo yeCape Matapan
. Muna 1941 Knox akaputsa Abwehr Enigma. Pakupera kwehondo, Intelligence Service Knox yakanga yaparadzira 140,800 Abwehr decrypts, kusanganisira ruzivo rwakakosha rweD-Day.