ChatGPT-6 Astra cracks 1941 Enigma message in two days, Crypto Cellar reports
Researchers at Crypto Cellar say ChatGPT-6 Astra decrypted an unsolved German Army Enigma transmission from July 10, 1941, known as the MVUEH message, in just two days. The 82-letter cipher was posted online in 2005 as challenge Nr. 172 and had resisted human cryptanalysts for years. According to the report, Astra selected the target itself, hypothesized a link to another message (Nr. 173,…
Key points
- ChatGPT-6 Astra decrypted the 1941 MVUEH Enigma message in two days, Crypto Cellar reports
- The model chose the target, wrote simulator and Bombe code, and used a "ROSENOW ROSENOW" plaintext guess
- Decrypted text reveals a German Army position report to the SS-Totenkopf Division
The story so far
3 episodes →- ChatGPT-6 Astra cracks 1941 Enigma message in two days, Crypto Cellar reportsthis story
ChatGPT-6 Astra cracks 1941 Enigma-coded message in two days
Tom's Hardware · 26 September 2026
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