A unit of the General Staff of the Polish Army in the Second Polish Republic, within whose structure the Cipher Bureau operated.
It was in agreement with the Second Department that Professor Zdzisław Krygowski organised a cryptology course in Poznań at the turn of 1928 and 1929.1,2
More in the service card: Cipher Bureau (Biuro Szyfrów).
Sources
- Grzegorz Łukomski, The Poznań beginnings of ‘Enigma’, ‘Mars. Problematyka i Historia Wojskowości’ vol. 10, Warsaw–London 2001 (reprint: Adam Mickiewicz University) (in Polish)
- Foreign Intelligence Agency, They broke Enigma (in Polish, with English versions of the biographies)
Checked: 4 November 2026