rtrapasso -> RE: Intel reports (10/28/2010 2:41:17 PM)
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ORIGINAL: War History quote:
ORIGINAL: mike scholl 1 quote:
ORIGINAL: War History Nice of you to focus on 1 part and totally ignore the first paragraph. Guess its easier to make your point by ignoring other facts that stand in the way of that point. "In contrast to the allied side of the Pacific war the fact is widely unknown to historians that also Japan since the early 1930s was able to read the military and diplomatic ciphers of the United States as well as of Great Britain, though to a lesser degree than their enemies, and exchanged cryptographic information with the Axis partners, including captured code books." The problem with this assertion is that there is absolutely NO combat evidence to support the claim. The history of the Pacific campaign is overrun with examples of the Allies using decoded information to bedevil the Japs. Midway is only the most famous incident..., there are hundreds of others. But where are the Japanese intelligence coups? Name the engagements the Japanese won by reading Allied Codes. No evidence? how about the 2 Tokyo Rose reports cited already BEFORE the troops even knew where they were going? I think that is pretty good "evidence" and how many dozens or hundreds more? How many Japanese troops were on Chi-Chi Jima or Ha-Ha Jima? Not nearly the 27,000 on Iwo I suspect. Why would that be the case if the Japanese didn't know they were going to Iwo? Well known that the Japanese knew the allied invasion was coming to Kyushu. With the allies holding Iwo and Halsey pounding airbases from Tokyo north, why would the Japanese suspect Kyushu if not for intercepts et al? I could go on but if you refuse to believe then there is probably very little I can say that would convince you, since you seem to want to live in your little bliss of ignorance of the real situation instead of actually finding out the truth. None of this is exactly firm evidence that the Japanese decoded a single message... all the intel could be (and from what i have read) be derived from other sources. There is considerable evidence that the Japanese FAILED to decode much of anything during the war, including testimony from the Japanese "code breakers" themselves. Again, if you are really interested, i refer you to David Kahn's excellent The Codebreakers, a history cryptanalysis. Despite the recent "news" that the Japanese had broken the diplomatic codes (in the 1930s), this fact was widely known. US diplomatic codes were something of a farce. The Codebreakers pp 490-491 "... by the time the United States entered the war, every major European power must have had one or more American diplomatic codes." The US KNEW that Japan had penetrated the "Gray Code" (one of the standard US diplomatic codes), and in fact when FDR sent his last minute peace proposal to Emperor Hirohito on December 6, 1941, he scrawled a message (shown in the book) with it "Dear Cordell, shoot this to Grew [the US ambassador to Japan] -- I think can go in gray code -- saves time -- I don't mind if it gets picked up FDR". I.e. Roosevelt KNEW the diplomatic code had been penetrated, and was hoping that the Japanese codebreakers would get the message. Unfortunately for the efforts of peace, the Hirohito government DID get the message and sat on it, since the Pearl Harbor attack was already in motion. Operational use of these codes (i.e., the manner in which they were used) changed abruptly on December 7. However, the US would occasionally use the penetrated codes, using them "only for messages which we were willing or even anxious to have the Germans read, and over the months we discarded it entirely. To have stopped using it immediately would have told the Germans that we knew they had broken it." )pp 498-499. The high US MILITARY codes were generally "one time pads", which were machine generated, and theoretically unbreakable (it can be deciphered if someone captures the "pad", but this would be limited to a single message.) Both the lower level Russian and US codes were apparently never broken during the war. While based on something like the ENIGMA machine, supposedly there was a minor but important difference in construction which i can go into if people are interested. The US and Brits could and did break ENIGMA and (similar) IJ codes with a HUGE amount of effort, including developing electronic computers. The Japanese and Germans never mounted anything like the resources the Allies did to break codes.
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