Form to Encrypt/Decrypt using Vigenere-style Cryptography
This particular form handles any string of ASCII characters, encrypts
it, and writes the result in a single block of text as a sequence of
two-digit numbers (in hex).
- 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.