1. Whoa boy! There was so much technical stuff in these sections that most of it went over my head. Even on a second and third reading I was still having trouble following where they were going. I think I need to go back and really understand block ciphers. I understand bits just fine as far as binary arithmetic goes. However, I'm having trouble following all of the arithmetic they describe in the assigned sections. Also I get lost on some of the vocab they throw around. "Rounds" for example is a new word for me in this context. I also have a hard time with the idea behind encrypting the bits, using the key, and decrypting the bits.
2. Only one thing that I was really thinking about during the reading that I've thought about before: error detection. There are things instilled in the system to detect if things have been encrypted wrong. They use this in ISBNs for example. However, the thought occurred to me, What if there is an error in the error detecting? Shouldn't there be an error detector for the error detector? But then where do we stop with the error detecting?
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