Teletype ciphers beyond Bletchley: Swedish breakthrough

Cipher machine
Cipher machine on display at the Imperial War Museum Matt Crypto, Public domain, via Wikimedia Commons

The National Museum of Computing

Saturday, 25th July 2026 from 11.00 am to 12.30 pm
Block H, Bletchley Park, Bletchley MK3 6GX

When we think of World War II codebreaking, Bletchley Park dominates the narrative. However, a massive parallel cryptographic drama was unfolding in Scandinavia.

Join renowned historian and cryptology expert Marek Grajek as he explores the spectacular, forgotten story of the Swedish breakthrough against the Third Reich’s strategic cipher machine, the Geheimschreiber.

TNMOC events