Simple Noise May Stymie Spies Without Quantum Weirdness
Adrian Y. Cho · Science · 2005
With the grand ambition of sending unbreakable coded messages, some physicists are using exotic tools—streams of individual photons and quantum mechanics—to shut out prying eyes. But a wire and a few resistors may convey a message as securely, says a physicist who has devised a simple and—he claims—uncrackable scheme. The idea shows that "classical" methods might compete with budding "quantum cryptography," others say. "I believe in beautiful and simple ideas, and this is one of them," says János Bergou, a theorist at Hunter College of the City University of New York.