This is a 17 slide, highly animated, power point presentations on World War II - Breaking the Japanese Military Codes. Each of the presentation slides are editable so you can change it to fit your individual needs.
When one thinks about cryptography or encryption in World War II, the first thing that comes to mind is the Enigma Machine used by the Nazis, whose code was broken by the Allies and used as a secret tactical advantage. But what many people don’t know is that just before World War II, the Japanese also developed a series of encryption devices that improved upon the Enigma Machine and were used to transport their top level military secrets. United States intelligence was able to crack the Japanese Purple Machine.
The Purple Machine was much improved over the German Egnima Mchine and the previous Japanese red Machine. The key changed every day, code breakers would not be able to find patterns in messages sent over several days. The daily key would be inputted into the device by the arrangement of the switchboard and rotors. The switchboard contained 25 connections, which could be arranged into 6 pairs of connections, yielding over 70,000,000,000,000 possible arrangements which would determine the method of encryption.
After a great effort by U.S. cryptanalysis the code was broken and used against its makers, tracking Japanese Naval troop movement as well as other military communications. Unlike the Red Cipher, the U.S. tried taking full advantage of this by keeping it a well-guarded secret from the Japanese and its allies so that the messages would continue to be sent in the broken code.
The presentation covers the following:
The Purple Machine
Method of Encryption
Hard to Crack
Breaking the Code
Friedman & Others
Many Codes Broken
End of Presentation
This is one of many power point presentations I offer in my store under the heading.... World War II.