Kammala jumla mai zuwa: Marian Adam Rejewski (; 16 ga Agusta 1905 <unk> 13 ga Fabrairu 1980) masanin lissafi ne na Poland kuma masanin ilimin lissafi wanda a ƙarshen 1932 ya sake gina injin Enigma na sojan Jamus wanda ba a gani ba, tare da taimakon iyakantaccen takaddun da aka samu ta hanyar leken asirin sojan Faransa. A cikin kusan shekaru bakwai masu zuwa, Rejewski da abokan aikinsa masu ilimin lissafi-cryptologists Jerzy Różycki da Henryk Zygalski sun haɓaka kuma sun yi amfani da dabaru da kayan aiki don warware ƙididdigar injin Jamusawa, har ma da Jamusawa sun gabatar da gyare-gyare ga kayan aikin su da hanyoyin ɓoyewa. Makonni biyar kafin barkewar Yaƙin Duniya na II, 'yan Poland, a wani taro a Warsaw, sun raba nasarorin da suka samu tare da Faransawa da Burtaniya, don haka ya ba Burtaniya damar fara karanta sakonnin Enigma na Jamus, shekaru bakwai bayan sake fasalin Rejewski na asali na injin. Bayanin da Burtaniya ta samu daga ɓarnatar da Enigma ya zama wani ɓangare na abin da aka sanya wa suna Ultra kuma ya ba da gudummawa "watakila da gaske" ga
Rashin nasarar Jamus.