![](https://scienceblogs.de/klausis-krypto-kolumne/files/2021/02/Cipherbrain-Visual.png)
After WW2, German author Arno Schmidt created an encrypted letter addressed to Truman, Stalin, and Churchill. To my knowledge, is has never been deciphered.
After WW2, German author Arno Schmidt created an encrypted letter addressed to Truman, Stalin, and Churchill. To my knowledge, is has never been deciphered.
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