1. One thing that confused me were the ADFGX ciphers, as well as the block ciphers. It was a lot of work, and made it a little hard to understand. I guess it was the fact that not only we have a keyword, but we're only putting part of the message into a matrix, then crypting the message seprately. At least that's what I think it meant. As with everything in this book, an example would be nice in class, probably for the Playfair, ADFGX, and Block ciphers.
2. I always say that I like the history of cryptography, and this section was just as good. I think my favorite part was learning about the ADFGX cipher, and how it was used by the British forces. The fact that it was deciphered by French cryptanalyst Georges Painvin was pretty great, and how they were able to decrypt a lot of messages. I wonder how long it took the British to realize they'd been compromised!
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