1. I thought I understood Identification scheme until it got to the point of where it asks 'what if Peggy doesn't know a square root of y?' I didn't follow the guessing process. Then in the actual Feige-Fiat-Shamir Identification Scheme, I came to realize that I really didn't understand it at all. I think it is compute y that gets me.
2. The story about the fake atm was pretty clever. I think it was just recently that there were people installing code on atms that would record and send peoples' information to the thieves. The Zero-Knowledge Proofs are pretty interesting; it seems like it is based of probability. Yet, there are some differences I feel.
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