7.4-7.5

The Diffie-Hellman key exchange was a really nice surprise since it's so simple, and it's easy to understand how it works. I like how it seems like it would be easy to break, but in reality it's very very hard. I didn't understand the ElGamal crypto system. I'm not sure what they are trying to do in it, and it seems kind of strange. I see why it works with the identity, but I'm not sure on the rationale behind it.