Mezue ahịrịokwu na-esonụ: Marian Rejewski (1905<unk>80), onye Poland na-agụ mgbakọ na mwepụ, na December 1932 doziri ígwè ọrụ Enigma nke nwere plọgboard, bụ́ isi ihe eji ede ihe nke Nazi Germany ji mee ihe. Ihe ịga nke ọma nke Rejewski na ndị ọrụ ibe ya bụ Jerzy Różycki na Henryk Zygalski, ihe karịrị afọ isii na ọkara mgbe nke ahụ gasịrị, malitere ịgụ akwụkwọ Enigma na Britain na Agha Worldwa nke Abụọ; ọgụgụ isi enwetara, nke a na-akpọ "Ultra", nyere aka, ikekwe na-ekpebi ihe.
mmeri nke Germany.