1. There were a lot of calculations that bogged me down in tonight's readings. It was hard to follow what Bob was calculating, what Alice was calculating, what Bob need to calculate and when, etc. I also didn't understand the final proposition of 7.5. That is, I didn't quite understand the seemingly inverse relationship between Decision Diffie-Hellman and ElGamal ciphertexts. There was also a part about the exchanging of keys. I understood how the keys were determined by each individual party, but I didn't quite understand the logistics of how this kept the key out of the hands of other parties.
2. One additional question that I've thought about throughout the readings of discrete logs altogether involves the differences between RSA and discrete logs. In other words, when is one system more desirable than another? When are both systems equally desirable?
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