1. It was a little bit hard to remember which step was which as I was reading along. I'd have to keep looking back a page or two to remind myself what BS, SR, MC and ARK meant. Also, in section 5.4, it's hard for me to see why the design used escapes the attacks mentioned.
2. It is interesting how fast diffusion occurs in Rijndael; that in two rounds, all 128 output bits depend on all 128 input bits. Another thing I like about this system is the simplicity of the s boxes. These s boxes seem more practical than those in DES.
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