4.1, 4.2, and 4.4, due on Sept 23

Difficult:
     I didn't really understand how the expander function worked. It makes sense that it scrambles the data up more and makes it a harder to decipher. I'm not quite sure how we input the 6 bits and get 8 bits out. I don't know where we got the S-box from. I know how it works but I'm not sure who decided what the S-box was filled with. 

Reflective:
     So I learned about AES in my Computer Security class this semester. It's interesting how differently it's explained in the different ways. I think it made more sense in the Computer Security class because it was a much more formulaic approach it seemed.