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Venetian spymaster Giovanni Soro decrypted Vatican letters for the Council of Ten using frequency analysis
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Venetian spymaster Giovanni Soro decrypted Vatican letters for the Council of Ten using frequency analysis

HERE’S THE INTERESTING PART

Soro cracked rival ciphers with frequency analysis, but Venice’s own codes posed a different problem: an accurate translation could expose them. When the pope asked him to decipher Venetian messages, Soro sometimes supplied false readings, helping the codes keep their reputation for being unbreakable.

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