GPT-6 Astra helped decode a 217-year-old cipher letter to Napoleon's marshal
AI engineer Carter Church used GPT-6 Astra to decode an 1809 cipher letter sent by Napoleon to Marshal Marmont. The AI processed a low-resolution image of 1,300 symbols, transcribing them and applying a simulated annealing algorithm to crack the homophonic cipher in approximately six hours. The decrypted text details Napoleon's military deployments and his prediction that Austria would fall. Church has released the decoder and key to allow other researchers to reproduce the findings.
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- ✓ GPT-6 Astra helped decode a 217-year-old cipher letter to Napoleon's marshal.
- ✓ The decoding process took approximately six hours.
- ✓ The letter was written in 1809 and addressed to Marshal Marmont.
- ✓ AI engineer Carter Church used the tool to transcribe and decipher the message from a scanned image.
What changed
Carter Church utilized GPT-6 Astra to transcribe and decrypt an 1809 military letter to Marshal Marmont.
Live updates
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GPT-6 Astra decodes 217-year-old Napoleonic cipher in six hours
AI engineer Carter Church used GPT-6 Astra to decode an 1809 cipher letter sent by Napoleon to Marshal Marmont. The AI processed a low-resolution image of 1,300 symbols, transcribing them and applying a simulated annealing algorithm to crack the homophonic cipher in approximately six hours. The decrypted text details Napoleon's military deployments and his prediction that Austria would fall. Church has released the decoder and key to allow other researchers to reproduce the findings.
Why it matters
The letter had remained unread for over two centuries because the original cipher book was lost. This recovery fills a 160-year gap in the published correspondence of Napoleon.
What is confirmed
- GPT-6 Astra helped decode a 217-year-old cipher letter to Napoleon's marshal.
- The decoding process took approximately six hours.
- The letter was written in 1809 and addressed to Marshal Marmont.
- AI engineer Carter Church used the tool to transcribe and decipher the message from a scanned image.
Still unconfirmed
- The letter contained 1,300 handwritten symbols comprising 155 unique units.
- The AI identified 33 known letters as anchor points and deduced that 29 symbols represented entire French words.
- The AI wrote its own code using a simulated annealing algorithm to solve the homophonic cipher.
What to watch next
- Independent verification of the decrypted text by historians
- Publication of the full restored correspondence gap
confidence 90%Sources used for this update (13)
- RuntimeWire — GPT-6 Astra helped decode a 217-year-old cipher letter to Napoleon's marshal
- The Telegraph — Napoleon’s 217-year-old coded message ‘cracked by AI’
- The Times — Napoleon’s centuries-old code cracked by AI in six hours
- NDTV — Napoleon's 217-Year-Old Mysterious Letter Cracked Using AI In 6 Hours
- calcalistech.com — SentinelOne AI researcher uses GPT-6 Astra to crack Napoleon cipher after 217 years
- Euronews.com — AI decodes 217-year-old Napoleonic letter in 6 hours
- runtimewire.com — GPT-6 Astra helped decode a 217-year-old cipher letter to ...
- www.techtimes.co.uk — GPT-6 Astra Helps Crack 217-Year-Old Napoleonic Cipher From ...
- allydaily.com — GPT-6 Astra helps crack 217-year-old cipher letter to ...
- www.livescience.com — 'A kind of Rosetta Stone': AI decodes 217-year-old secret ...
- www.htx.com — Breaking News: GPT-6 Astra Solves Napoleon's Century-Old ...
- www.calcalistech.com — SentinelOne AI researcher uses GPT-6 Astra to crack Napoleon ...
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