Difficult:
I don't think I really understood how the Playfair Cipher works. I think it's interesting that we first change the plaintext into different plaintext before we actually encrypt it. I'm not great with matrices so that will take some practice to really understand that. I just have to get used to matrix operations again.
Reflective:
I think it's amazing that as technology has increased we've been able to come up with better and better encryption methods. Even in WWI there encryption methods weren't at all difficult compared to some of the encryption methods we have now. With the power of the computer we are now able to do so much more encrypting and decrypting quickly that our ciphers can be much more complex.
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