Sign In

Communications of the ACM

China Region Special Section: Hot Topics

Quantum Communication at 7,600km and Beyond

quantum communication, illustration

Credit: Yurchanka Siarhei

The exponential growth of the Internet and e-commerce shows the importance of establishing a secure network with global protection of data. Cryptography, the use of codes and ciphers to protect secrets, began thousands of years ago. While conventional cryptography methods predominantly rely upon mathematical complexity, their encryption can usually be defeated by advanced hacking.

The idea of quantum cryptography, proposed by Bennett and Brassard in 19841 and by Ekert in 1991,2 offered a radical, secure solution to the key exchange problem based on information theory, ensured by the laws of quantum physics. Quantum key distribution (QKD) allows two distant parties to produce a random string of secret bits, called a secret key.


No entries found

Log in to Read the Full Article

Sign In

Sign in using your ACM Web Account username and password to access premium content if you are an ACM member, Communications subscriber or Digital Library subscriber.

Need Access?

Please select one of the options below for access to premium content and features.

Create a Web Account

If you are already an ACM member, Communications subscriber, or Digital Library subscriber, please set up a web account to access premium content on this site.

Join the ACM

Become a member to take full advantage of ACM's outstanding computing information resources, networking opportunities, and other benefits.

Subscribe to Communications of the ACM Magazine

Get full access to 50+ years of CACM content and receive the print version of the magazine monthly.

Purchase the Article

Non-members can purchase this article or a copy of the magazine in which it appears.
Sign In for Full Access
» Forgot Password? » Create an ACM Web Account