Earlier quoted context omitted.
Nazi Germany and Japan partly lost WW2 because the Americans and the British broke their codes. Particularly the Japanese. Had the axis known their codes were broken they would have made new ones. Intelligence gathering would have been worthless without secrecy in this case. To be honest I don't really know too much about this. I've read Cryptonomicon, and that's basically it. But it would be hard to dispute that sig…
It's tough to dispute that this stuff is useful while in a major war, but I think the relevant question here is whether you need to have it all in place ahead of time, or whether you can spin it up on demand, as it were. In any case, SIGINT certainly helped a great deal, but what really won the war for the allies was the roughly order of magnitude difference between the size of the economy of the United States and th…
I think it would be very hard to spin up on demand. There's not a catalogue of talented SIGINTs lying around. These people need to be found and hired. A whole organization as big as Google would have to be built overnight. It would be a nightmare. Not to mention that this organization would be starting from scratch while its counterparts might have taps into American society already.