To understand the One-time pad, you have to understand the Caesar Cipher. To encode something in it, you assign a "shift" of 1-26 to the entire text. So if you have a shift of 1, A becomes B, BC becomes CD and so forth. This doesn't really work, though, since the frequencies of the shifted letters stay the same (e.g, with a shift of 1, F will be as frequent as E would normally be.). With the one-time pad, though, each letter has its own shift, so you can only decipher it if you have a key with all the numbers of the shifts on it. If none of that made sense, check these videos: Caesar Cipher- https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/caesar-cipher One-time pad- https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad
It might also be helpful to watch this-https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/intro-to-cryptography Also, don't put any spaces in your message.(or underscores)
