What was difficult?
Following the encryptions methods and decryption methods (and verifying that they work) was a little difficult for me. Specifically when it came to doing the Hill ciphers where matrix multiplication was being done mod 26. Took some time to convince myself that you can use the mod 26 version of the inverse rather then the true mathematical inverse to decrypt.
Reflections
It really impresses me the cleverness and creativity that goes into some of these ciphers. I like how we are getting into more complex ciphers and its just very interesting what some people came up with. I really liked the Hill cipher as I thought it was a really cool idea to use matrices to encrypt blocks of letters instead of just one at a time.
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