OpenAI GPT–6 Astra breaks Enigma message that has resisted solution since 2005
summary
GPT-6 Astra successfully decrypted a German Army Enigma message from 1941 that had remained unsolved since 2005. The AI achieved this by autonomously identifying the most promising target, developing its own simulation software, and cross-referencing archive data. This breakthrough demonstrates the ability of advanced AI to perform complex, professional-level cryptanalysis and archival research independently.
key points
- The AI identified a relationship between the unsolved MVUEH message and a previously solved message, using a specific place name as a 'crib' to break the code.
- GPT-6 Astra autonomously wrote Python and C++ code to create an Enigma simulator and a 'Bombe' to systematically test keys.
- The AI exhibited advanced research capabilities by locating and referencing specific, non-public archive records from the German Bundesarchiv to guide its analysis.
who should read it
History enthusiasts, cryptographers, and AI researchers interested in the intersection of machine learning and historical decryption.
discussion positive
consensus
Commenters generally agree that the Enigma decryption was achieved through a combination of LLM-driven code generation and heuristic search rather than a mystical 'intelligence' breakthrough. They conclude that the task was computationally tractable for modern hardware and benefited from the LLM's ability to integrate existing open-source Enigma implementations. The sentiment is skeptical of the marketing narrative that this was an impossible feat for hobbyists, suggesting instead that it was a well-documented problem that simply required sufficient compute and systematic application of known methods.
top insight
The use of 'ROSENOW ROSENOW' as a crib was a strategic choice because longer cribs are significantly more effective in Enigma decryption; the repetition occurred because Rosenow is both a municipality and a district, providing a longer, more unique string to slide against the ciphertext to eliminate impossible key settings.
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