888-384-7144 info@insidequantumtechnology.com

Plug and Play Continuous Variable Quantum Key Distribution for Metropolitan Networks

By IQT News posted 15 Jul 2020

(OSA) Researchers release new study:  “Plug and play continuous variable quantum key distribution for metropolitan networks”, published by partners of the CiViQ project. The plug-and-play CV-QKD system demonstrated in this paper has the potential to become an effective low-cost solution for securing short-reach metropolitan networks.
The plug-and-play continuous variable quantum key distribution system (CV-QKD) is Gaussian modulated quadratures and a true local oscillator.
Quantum key distribution (QKD) is the most prominent quantum cryptographic protocol as it allows two remote network nodes to generate an ultra-secure encryption key. At the moment, there are two main QKD protocols: discrete variable (DV) and continuous variable (CV). While DV-QKD heavily relies on single photon detector technology, CV-QKD provides security through shot-noise limited coherent detection. The CiViQ project uses Continuous-Variable (CV) QKD technology as it offers the potential for flexible, software defined systems that can be readily integrated in innovative and upgradable dynamic network architectures.
Typically, plug-and-play QKD systems suffer from Rayleigh back-scattering noise generated by the high power laser signal simultaneously transmitted with the quantum signal at the same wavelength and fiber channel. The Rayleigh back-scattering noise limits the performance and the maximum secure communication distance of the system compared to one-way CV-QKD protocols. In this paper, researchers propose a plug-and-play CV-QKD system that minimizes the noise from Rayleigh back-scattering by using two independent fiber strands for the distribution of the laser and the transmission of the quantum signals.

Subscribe to Our Email Newsletter

Stay up-to-date on all the latest news from the Quantum Technology industry and receive information and offers from third party vendors.

IQT Partner Program

Quantropi
DUSA
McAndrews
HKA
Aliro
RANDAEMON
Zapata
Quantum Xchange
Toshiba
Quintessence Labs
Keysight World
0