1. The difficult part about this section was understanding why the first method of finding the key works. I know how to follow the steps of computation and do it but I don't understand why when i=j the letters have been shifted the same amount...oh ok. I just looked at it again I think I got it. But this is still the hard part. The idea of why the first key finding method works is so big I'd like to be walked through it again to get my mind around it.
2. This is a really cool encryption process because letters don't keep mapping to the same things. That's what my group was trying to get around when we derived our code for the last hw assignment. We didn't do quite as good a job as a Vigenere cipher but we still made a good code. It's kind of fun breaking codes too. It would have taken me a long time to come up with a way to break the Vigenere cipher. It's pretty ingenious what other people have come up with. Cool.
And thanks with last lecture doing examples and letting us try an example. That clarifies a lot.
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