The Exciting
After class, I was able to spend some time to convince myself that x inverse was the same as x^6 in the example we did in class, and then I felt much more comfortable about our Baby AES. It was really helpful going over that in class because it made it much easier to understand the Read AES in the book.
The Difficult
I think the best way to show what I find difficult in these particular sections is to ask some questions.
-On page 154 in the ByteSub Transformation, How come you can plug in an 8 bit input and obtain an output of only 6 bits? Do we just add two 0's to the beginning of it to make it match?
-On page 156 in the MixColumn Transformation, we "Multiply this by a matrix to produce our output." How do you know the matrix? Is it just made up? When we decrypt this same step, how do they come up with that matrix (page 158)?
-Could we go over an example of the key schedule when i is a multiple of four? I would like to make sure that the way I understood from the reading is the real way.
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