Teletype ciphers beyond Bletchley: Swedish breakthrough.

Think Bletchley Park was the only front in the WWII code war? Think again.

Join us at The National Museum of Computing for an exclusive in-person event with world-renowned historian Marek Grajek. We’re unmasking one of the greatest—and most forgotten—cryptographic triumphs of the 20th century: The Swedish Breakthrough.While the world focuses on the heroes of Bletchley, a massive parallel drama was unfolding in Scandinavia. Discover how Swedish cryptanalysts took on the Geheimschreiber, the Third Reich’s strategic cipher machine, and won.Why you can't miss this:

• The "Fish" Files: Learn the secret history of the "Sturgeon" and "Tunny" codes.
• The Lone Genius: Meet Arne Beurling, the mathematician who reconstructed the Geheimschreiber’s secrets from a single tapped telegraph cable.
• Espionage & Leaks: Hear how news of this breakthrough leaked to the Russians, the Germans, and the UK, changing the course of the war.
• The 13 Critical Elements: Marek Grajek will systematically trace the mathematical triumphs and geopolitical fallout of this incredible feat.

Was Bletchley really the only centre for "Fish" codebreaking? Were mathematicians actually "useless" in cryptology, as some leaders claimed? This presentation dives deep into the high-stakes world of radio intelligence and the founding myth of Sweden’s FRA.Book your seat now to witness the reconstruction of a masterpiece of codebreaking!