Vigenère Cipher
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HISTORY
Cryptography
Vigenère Cipher
A 16th-century French cipher was once deemed unbreakable for centuries
10 days ago
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What made the Vigenère cipher more secure than earlier monoalphabetic ciphers?
It relied on a single fixed shift for all letters in the message.
It used multiple Caesar ciphers based on a keyword, varying the shift for each letter.
It was a mechanical device that physically scrambled letters.
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