Part of the process for decrypting ROMs. If you don't understand it in terms that have already been posted, this isn't for you.
Buy one. Or get other people to test it for you.
I got a 4.5 3ds. But i am not understanding everything and all the terms in this thread either. But if I don't read and try to understand, I for sure will never learn.
So telling that this isn't for us is crap.
Now you go Shoo! Shoo!