1. I was a little confused about the equation we were given where b = a^x, and a^(p-1)=1(mod p) implies that a^(p-1)/2 = +- 1(mod p). why is this true? Was it a rule we learned already? I can't remember if it was or not.
2. Reflectively, I was wondering to myself how they come up with these names for different methods. At the beginning of the chapter, it talks about the important birthday attack. Really? Who comes up with this? Before we had Rijndael and LUCIFER. I know they usually mean something specific, but I am pretty sure in some cases, like LUCIFER, they will change around words so that it will become that anagram.
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