👑

Vigenère Cipher Encoder/Decoder

Encrypt and decrypt text using the Vigenère polyalphabetic substitution cipher with keywords

Info Title

Info Text

👑 Historical Note: Historical Note

Keyword Hint

🔍 How It Works:

Step1

Step2

Step3

Plaintext: HELLO
Keyword: KEY → KEYKE
Shifts: K(10) E(4) Y(24) K(10) E(4)
Ciphertext: RIJVS

Examples:

Text: ATTACK AT DAWN
Keyword: LEMON
Encrypted: LXFOPV EF RNHR

💡 Security Note

Security Text

⌨️ Keyboard Shortcuts:

  • Ctrl/⌘ + Enter — Process/Generate
  • Ctrl/⌘ + Shift + C — Copy Result
  • Ctrl/⌘ + R — Reset/Clear
✨

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