Which of the following methods of encryption has been proven to be almost unbreakable when
None of the choices.
It’s possible to protect messages in transit by means of cryptography. One method of encryption –
-the one-time pad –has been proven to be unbreakable when correctly used. This method uses a
matching pair of key- codes, securely distributed, which are used once-and-only-once to encode
and decode a single message. Note that this method is difficult to use securely, and is highly
inconvenient as well.