Added protection of proposed method makes eavesdropping nearly impossible
A proposed quantum encryption technique would ensure secure communication while removing the painstaking step of checking for potential eavesdroppers. The efficient approach could eventually form the basis of a secure quantum network for exchanging sensitive information.
Computer-generated encryption protects data such as credit card numbers, passwords and confidential communication from would-be snoopers. However, this encryption is breakable, and there’s no smoking-gun signal that someone has cracked the code. A hacker can steal information for a long time before anyone finds out.
In 1984, physicists Charles Bennett and Gilles Brassard proposed the first quantum cryptography protocol, a way to use quantum mechanics to create a guaranteed secure link. Their approach calls for a receiver to measure the delicate quantum properties of photons in laser pulses and compare notes with the sender to establish a secret key (