Form to Encrypt/Decrypt using Vigenere-style Cryptography
This particular form strips out all the characters that are not
lowercase alphabet letters, encrypts them, and writes the result in a
single block of text, so as to spoil information about word-length. It
also shows you what it encrypted by changing the text on the left.
- Put in your password (codeword).
- Put in your plaintext.
- Click the "encrypt" button. The ciphertext appears. You can then
email that to someone, if you want to.
- Delete the plaintext. Clicking the "decrypt" button restores it
from the ciphertext. If someone emailed you some ciphertext, you
could decrypt it in the same way.