A flexible continuous-variable QKD system using off-the-shelf components

We present the development of a robust and versatile CV-QKD architecture based on commercially available optical and electronic components. The system uses a pilot tone for phase synchronization with a local oscillator, as well as local feedback loops to mitigate frequency and polarization drifts. Transmit and receive-side digital signal processing is performed fully in software, allowing for rapid protocol reconfiguration. The quantum link is complemented with a software stack for secure-key processing, key storage and encrypted communication. All these features allow for the system to be at the same time a prototype for a future commercial product and a research platform.

[1]  Frédéric Grosshans,et al.  Continuous-variable quantum cryptography is secure against non-Gaussian attacks. , 2004, Physical review letters.

[2]  Robert König,et al.  Universally Composable Privacy Amplification Against Quantum Adversaries , 2004, TCC.

[3]  P. Grangier,et al.  Continuous-variable quantum-key-distribution protocols with a non-Gaussian modulation , 2011, Physical Review A.

[4]  Bing Qi,et al.  Generating the local oscillator "locally" in continuous-variable quantum key distribution based on coherent detection , 2015, 1503.00662.

[5]  Anthony Leverrier,et al.  Composable security proof for continuous-variable quantum key distribution with coherent States. , 2014, Physical review letters.

[6]  P. Grangier,et al.  Continuous variable quantum cryptography using coherent states. , 2001, Physical review letters.

[7]  Anthony Leverrier.  Distributing Secret Keys with Quantum Continuous Variables , 2016 .

[8]  Sébastien Kunz-Jacques,et al.  Long Distance Continuous-Variable Quantum Key Distribution with a Gaussian Modulation , 2011, Physical Review A.

[9]  Hao Qin,et al.  Coexistence of continuous variable QKD with intense DWDM classical channels , 2014, 1412.1403.

[10]  N. Cerf,et al.  Quantum key distribution using gaussian-modulated coherent states , 2003, Nature.

[11]  Eleni Diamanti,et al.  Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations , 2015, Entropy.

[12]  Bing Qi,et al.  Practical challenges in quantum key distribution , 2016, npj Quantum Information.

[13]  Maxim Kuschnerov,et al.  A low-complexity heterodyne CV-QKD architecture , 2017, 2017 19th International Conference on Transparent Optical Networks (ICTON).

[14]  Larry Carter,et al.  Universal Classes of Hash Functions , 1979, J. Comput. Syst. Sci..

[15]  Peng Huang,et al.  Long-distance continuous-variable quantum key distribution by controlling excess noise , 2016, Scientific Reports.

[16]  Larry Carter,et al.  New Hash Functions and Their Use in Authentication and Set Equality , 1981, J. Comput. Syst. Sci..

[17]  A. Poppe,et al.  Experimental evaluation of the impairments on a QKD system in a 20-channel WDM co-existence scheme , 2017, 2017 IEEE Photonics Society Summer Topical Meeting Series (SUM).

[18]  Peng Huang,et al.  High-speed continuous-variable quantum key distribution without sending a local oscillator. , 2015, Optics letters.