Racism probably was a factor; no one took the Japanese as a serious power, so saying they broke their codes wouldn't really mean much. Admitting that they had broken the German codes would signal they could do the same and had done the same to the Soviets, so to avoid them potentially changing their signal security it was probably thought best to keep that under wraps for a while until it no longer mattered.
Did they not get similar experience when Yardley published?The yanks didn't have such an experience after WW1
Did they not get similar experience when Yardley published?
Why is that any different from the Germans and enigma?But after WW2 Japan did not post any more threat.
I misread the title of the post (again...I should stop posting after drinking coffee on an empty stomach in the morning) thinking why was code breaking in the Pacific acknowledged before that in Europe. However I do think the US did want to brag about it's codebreaking efforts against the Japanese partially out of a sense of restoring pride given that the Japanese were whipping the US for the first 6 months of the war. The Brits were more focused on Europe so didn't really have so much of anything to prove, especially as the Pacific/Asian theater was largely forgotten post-war.I don't think that is true after the pre-war racism about Japan being unable to fly aircraft properly was disproved.
Why is it that the US codebreaking in the Pacific war was revealed much faster than Bletchley park?
ENIGMA machines were being manufactured and sold by the original company for years to both nation states and corporations both before and after WW2. Also the UK has always been a very secretive state, there were documents from the Crimean War that were only declassified in the 1990's for example.Possibly because the Foreign Office were selling captured Enigma machines to the Dominions after the war and didn't want them to know we could read their encrypted traffic? By '74 it wouldn't matter.