Kammala jumla mai zuwa: PURPLE ya kasance mai jan hankali, amma an iyakance shi sosai, taga a cikin shirin Japan da manufofi saboda yanayin musamman na tsarin siyasa na Japan kafin Yaƙin (duba sama). Tun da farko, mafi kyawun taga dabarun ita ce Dokar Jirgin Ruwa na Japan (wani cipher mai ɓoyewa), wanda ake kira JN-25 ta masu binciken cryptanalysts na Amurka. Rushewa a cikin sigar da aka yi amfani da ita a cikin watanni bayan Disamba 7, 1941 ya ba da isasshen bayani don haifar da nasarar sojojin Amurka a cikin yaƙe-yaƙe na
Coral Sea da Midway, suna dakatar da ci gaba na farko na Jafananci zuwa kudu da kuma kawar da yawancin sojojin jiragen ruwa na Japan. Daga baya, zirga-zirgar JN-25 da aka rushe ya kuma ba da jadawalin da kuma hanyar jirgin sama Admiral Isoroku Yamamoto zai tashi a yayin ziyarar dubawa a kudu maso yammacin Pacific, yana ba wa matukan jirgi na USAAF damar kwantar da jami'in da ya yi tunanin kai harin Pearl Harbor. Kuma har yanzu daga baya, samun damar sakonnin sojojin Japan daga ɓarnatar da zirga-zirgar sadarwar Sojojin ya taimaka wajen tsara kamfen din tsibirin tsibirin zuwa Philippines da kuma bayan.