AES encryption

[Tuvas]

I don't know if it means anything, but the AES system that I have isn't
set up to do anything other than 128 bit encryption at the moment, nor
will it likely do so, mainly because most systems only explain how to
get the 128 encryption, and not the larger sizes. I'm sure it's fairly
easy to change, but... Well, I'll take a look at it, but I don't have
the time at the moment...