Overview: A profile of Hollywood star Hedy Lamarr (1914-2000), who was known as the world's most beautiful woman. Behind the pretty face, however, was the mind of an ingenious inventor whose pioneering work helped revolutionize modern communication. An Austrian Jewish emigrant, she invented a covert communication system to try to help defeat the Nazis; and it was her concept that is now used as the basis for secure WiFi, GPS and Bluetooth technologies.