2.12 Enigma

• I enjoyed reading about a cryptosystem that was used in WWII. It is always neat to get the history behind the cryptosystems and see how they were used. I also thought it was interesting that they used rotors that spun. It seems like the messages would be very long Vigenere ciphers but the key would be too enormous to do any frequency analysis or anything. So it seems kind of like a one time pad that was used for all the messages that day.
• It was hard to understand how the knowledge of the permutations helped break the system.