Hill cipher, CBC, and One time pad

I'm going to make this post, then post it again in the replies as a Hill encoded (with CBC) message and a One-time Pad encoded message.  In both cases, the key is goback2b, something I thought might be a bit fitting.  I wrote this to allow a fairly secure encryption method that could be used on the internet.  Most formats work with files directly.   However, on message boards and such, we have to work with characters.  A lot of ASCII values are really odd characters, which may or may not display differently on different machines.  I chose to work with just the 71 most common characters.  This means you can copy and paste it around without messing everything up.  Could be interested to try here, to see what we can do.  The Hill cipher is veunerable to a known-plaintext attack, but requires n-squared pairs with the same key.  It's doubtful anybody here would be using the same key more than a few hundred times, though this could be a problem if the messages are all short.  Anyways, I'll post the code later, if desired.  For now, what could this be used for?

>>12
RETARD.
You encrypt the text first. Using AES or any good encryption algorithm.
THEN you convert THE ALREADY ENCRYPTED BYTES to base64 to make it copypastable.