1. (Difficult) Section 8.5 on Multicollisions was confusing to me. I understand that the hash of a message M is a compression of blocks of M into a fixed value, but I don't understand the concatenation part of finding multicollisions. Also, the time estimated did not make sense. Overall, this section was the most confusing and hard to follow.
2. (Reflective) I think the birthday paradox is very interesting. I have heard it several times and have had it explained to me, but I think I understand it better now. It is interesting because it seems intuitively wrong that the probability would be so high for two birthdays to match, but then I think of my birthday and how many people I know with the same birthday. I have met many people with the same birthday and expect that I will continue to do so.
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