INSTRUCTIONS:

1. Enter the text to encrypt in the Plain Text field (you may copy and paste it).
2. Enter the key in the Key field. (Use only alphabetic characters, others will not be processed.)
3. Push the encodebutton.

1. Enter the text to decrypt in the Plain Text field (you may copy and paste it).
2. Enter the key in the Key field. (Use only alphabetic characters, others will not be processed.)
3. Push the decode button.

Vigenere ciphers are fine for games like geocaching, where the encryption is not very important. It is not suitable, on its own, for applications where strong security is required.