1. Cryptography is a fascinating thing. I couldn't find anything difficult in this reading except for how all of this was discovered/thought of. :D
2. I liked the reading of birthday attacks on signatures and wonder how often we are being handed such electronic documents that have fraudlent equivalents(as far as their hashes go). I thought the RSA signature was very concise but I hypothesize that if you were to combine it with a hash function you would be unable to retrieve the message(i.e. message recovery scheme would fail to work) I like it better than El Gamal and don't remember in which situations El Gamal is advantageous over RSA.
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