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AI cracks 217-year-old Napoleonic cipher in hours

Original: Everyone is talking about the fact that AI deciphered the Napoleonic cipher (source: https://www. euronews.com/2026/10/0

Artificial intelligence has deciphered a Napoleonic-era encrypted letter that had gone unread for more than 200 years, reportedly cracking the code in about six hours. The breakthrough is drawing wide attention online, though some commenters note the human effort behind both the original cipher and the years of groundwork that made the AI solution possible.

Why now: The story is circulating widely because an AI solved a historical cryptography puzzle that had resisted decryption for over two centuries.

Napoleon BonaparteEuronewsartificial intelligence

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Evidence

• Everyone is talking about the fact that AI deciphered the Napoleonic cipher (source: https://www. euronews.com/2026/10/02/ai-dec odes-217-year-old-napoleonic-letter-in-6-hours ), but almost nobody says that a human being created something that took more than 200 years and AI to… · fpl@infosec.exchange · 3

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