Quantum Crypto Network Demonstrated

Researchers at Northwestern University and BBN Technologies have demonstrated what they say is the first truly quantum cryptographic data network.

The technique, called AlphaEta, integrates quantum noise protected data encryption (QDE) with Quantum Key Distribution (QKD), resulting in a data communication system that’s resistant to eavesdropping. It does this by using irreducible quantum noise in laser light to enhance the security of the system. Unlike most other physical encryption methods, AlphaEta maintains performance on par with traditional optical communications links and is compatible with standard fiber optical networks.

"The volume and type of sensitive information being transmitted over data networks continues to grow at a remarkable pace," said Prem Kumar, professor of electrical engineering and computer science at Northwestern and co-principal investigator on the project. "New cryptographic methods are needed to continue ensuring that the privacy and safety of each user's information is secure."

Unlike most other physical encryption methods, AlphaEta maintains performance on par with traditional optical communications links and is compatible with standard fiber optical networks.

Quantum Key Distribution exploits the unique properties of quantum mechanics to securely distribute electronic keys between two parties. Unlike traditional key distribution, the security of QKD can in theory provide quantitatively secure keys regardless of advances in technology. Typically, these ultra-secure keys would be used in traditional encryption algorithms to allow for high-speed encrypted communications.

BBN has built and demonstrated the world's first quantum network with untrusted network switches, delivering end-to-end key distribution via high-speed QKD since 2004. With the Boston Metro QKD network running 24/7, it is evident that quantum cryptography works in practice and may provide a technique for building highly secure networks.

"As secure communications require both secure key distribution and strong encryption mechanisms, the combined QKD/AlphaEta system represents the state-of-the-art in ultra-secure high-speed optical communications," said Henry Yeh, director of programs at BBN Technologies.

Posted by Jon Erickson at 08:49 AM  Permalink