One-Time Pad

The only theoretically unbreakable cipher. It uses a random key that is as long as the message and is used only once.

Input Text

Key (same length as text)

How it works:

•Key must be truly random and as long as the message
•Each character is XORed with the corresponding key character
•The key must never be reused (hence "one-time")
•Mathematically proven to be unbreakable when used correctly