1. I definitely got a little lost in the middle of 12.2. They mention for the Shamir threshold scheme splitting the keys into subsets so that a smaller amount of people can get the message. But to me, it looked like they were still using everyone to get the message. Then they put it into a matrix and take the determinant for some reason. That's about where I got lost and felt like I was just reading without even understanding what I was reading! Clarification on this would be most helpful.
2. At the very beginning of 12.2 they mention having a mechanism where two out of three keys will control a weapon. I literally thought about a spy movie before I read the line that mentioned it. They use a similar method in the White House Down movie that just came out. To launch a missile, there were three people that needed to give their authentication, including the president. It was a nice, cheesy thriller with Channing Tatum in it. It's cool that this concept is used in cryptography.
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