4.1, 4.2, 4.3 due September 23

1. This section was a handful! I was having quite the time trying to understand what was being talked about. This will be weird, but the hardest part for me to understand were actually the diagrams. I would think I had something figured out, then looking at the diagram, like Figure 4.1 on page 115, the Feistel System, I would be lost again. I don't think it was very explanatory, or at least comprehendible. I would like examples in class of basically everything, but mostly what was talked about in section 4.2.
2. First off, in the introduction, I thought it was pretty funny that the IBM algorithm was called LUCIFER. I think it would be pretty great to know if it actually just happened that way, or if the people who made the algorithm chose to call it that because it's a beast or something. I thought that it was pretty cool that it was so recent though, in 1974, because its a lot more relevant to what we have learned recently.