How did they get over the catch-22 that if they used the information that Nazis could guess it came from breaking the code but if they didn’t use the information there was no point in having it.
EDIT. I tagged this as mathematics because the movie suggests the use of mathematics, but does not explain how you use mathematics to do it (it’s a movie!). I am wondering for example if they made a slight tweak to random search patterns so that they still looked random but “coincidentally” found what we already knew was there. It would be extremely hard to detect the difference between a genuinely random pattern and then almost genuinely random pattern.
In: Mathematics
In the book Double Cross (not the Patterson book) the author explains how they allowed certain non crucial plans to be executed by the enemy so they had a false sense of confidence in the security of their communications. The complexity and depth of the spy game in WW2 is actually really amazing. The allies had their enemies thoroughly infiltrated and the axis spy game was weak af. Despite being allies (at a certain point) the Russkies completely infiltrated their own allied intelligence up the highest level. If Germany hadnt turned on Russia their spies might have been able to turn the tide of the war in their favor but probably not even still once the American war machine was in 5th gear.
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