Information is powerful it has to be used judiciously.
Cryptonomicon Neal Stephenson goes into a lot of detail about this. In the WWII side of the story, the alias get an Engima machine and are able to read ALL the German's plans. However, they run statistical analysis to see how much they can use at any one time and not give away the secret.
They want to attack a known fleet in the Med. they send out a single recon plane to get shot at but that plane makes it back home. They wait for the appropriate amount of time, then attack the fleet. In reality, they knew the exact strength and position and were lying in wait.
The Germans also get suspicious and run statistics against their losses in battle, but the stats play out. The high command so smug in Enigma strength continues its use. Even when (IIRC) Rommel claims it is broken.
Information is powerful it has to be used judiciously.
Cryptonomicon Neal Stephenson goes into a lot of detail about this. In the WWII side of the story, the alias get an Engima machine and are able to read ALL the German's plans. However, they run statistical analysis to see how much they can use at any one time and not give away the secret.
They want to attack a known fleet in the Med. they send out a single recon plane to get shot at but that plane makes it back home. They wait for the appropriate amount of time, then attack the fleet. In reality, they knew the exact strength and position and were lying in wait.
The Germans also get suspicious and run statistics against their losses in battle, but the stats play out. The high command so smug in Enigma strength continues its use. Even when (IIRC) Rommel claims it is broken.