Enigma Machine
Joins the Polish Cipher Bureau team attacking German Enigma traffic.
Historical biography archive · Updated 2026-11-03
Henryk Zygalski Biography and Timeline
Follow Henryk Zygalski through 5 dated historical records for Poland.
Henryk Zygalski, historical timeline
A chronological timeline drawn from matching World History Database records.
5Distinct records
1 of 1Page
1932–1939Years on this page
1932
1938
Enigma Machine
Designs perforated sheets that can identify Enigma settings despite increasingly complex plugboard connections.
Perforated-Sheet Cryptanalysis
Creates a manual technique that remains useful after German cipher procedures change.
Zygalski Sheets
Develops perforated sheets for identifying Enigma message settings.
1939
Enigma Machine
Demonstrates the perforated-sheet method to British and French cryptanalysts at the Pyry meeting.
Role range: 1939-1945
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.