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Vigenère Cipher Tool
Encrypt and decrypt text using the Vigenère polyalphabetic cipher.
Polyalphabetic Cipher
Key-Based
Classical Cryptography
Vigenère Cipher Tool
Polyalphabetic substitution cipher with advanced analysis and visualization features
GOOD
Good key - reasonably secure for most purposes
Length: 6 | Unique chars: 6/6
Security Note: While more secure than Caesar cipher, Vigenère cipher can be broken with sufficient ciphertext length through frequency analysis and Kasiski examination. Use modern encryption for sensitive data.