Hey All, I know that the US (and Allies?) were able to break a number of codes that really helped swing the Pacific War in their favor. What I am wondering is how messages were actually sent. From what I understand of it, the US sent most messages using Morse code so that each letter was encoded as a series of pulses. Did the Japanese have their own system like Morse to encode Japanese characters? I did some digging and came up with the "Purple" machine which sounds like it used a variant of the Roman alphabet and I guess was transmitted in Morse, but the article also seems to imply it was not the only machine used to encrypt messages. If they used a code different from Morse, was it publicly known or did the cryptographers have to "break" it as well? I have a very basic understanding of both the Japanese language/writing system and cryptography, so my apologies if my assumptions are incorrect.