🔐 Vigenere Cipher Tool
Encrypt and decrypt text using the Vigenere cipher
Plaintext
Ciphertext
Encryption Key
How it works
- • The Vigenere cipher is a polyalphabetic substitution cipher
- • Uses a keyword to shift each letter by different amounts
- • Each letter in the keyword determines the shift for the corresponding plaintext letter
- • More secure than Caesar cipher because the shift changes for each letter
- • Only letters A-Z are encrypted; other characters are removed