> To deceive your enemy is a valuable thing. I just watched this excellent lecture on the Colossus machine [0] and learned that our invasion of Normandy was suc

> To deceive your enemy is a valuable thing. I just watched this excellent lecture on the Colossus machine [0] and learned that our invasion of Normandy was successful in part thanks to US communications being able to "leak" plans to Nazi code breakers and fool them into thinking we would land in an entirely different beach. (The colossus decoding high command communications allowed us to confirm the deception was successful) The same pattern of confirming the success of a deception via Ultra/Colossus occurred with Operation Mincemeat: https://en.m.wikipedia.org/wiki/Operation_Mincemeat https://en.m.wikipedia.org/wiki/Operation_Mincemeat