books.google.ch - In 1974, the British government admitted that its WWII secret intelligence organization had read Germany's ciphers on a massive scale. The intelligence from these decrypts influenced the Atlantic, the Eastern Front and Normandy. Why did the Germans never realize the Allies had so thoroughly penetrated...http://books.google.ch/books/about/Delusions_of_Intelligence.html?hl=de&id=n9St5-klST0C&q=traf%EF%AC+c&utm_source=gb-gplus-shareDelusions of Intelligence
