100Mbps Reconciliation for Quantum Key Distribution Using a Single Graphics Processing Unit

High Performance Information Reconciliation for QKD with CASCADE

It is widely accepted in the quantum cryptography community that interactive information reconciliation protocols, such as cascade, are ineffcient due to the communication overhead. Instead, non-interactive information reconciliation protocols based on i.e. LDPC codes or, more recently, polar codes have been proposed. In this work, we argue that interactive protocols should be taken into consideration in modern quantum key distribution systems. In particular, we demonstrate how to improve the performance of cascade by proper implementation and use. Our implementation of cascade reaches a throu…

连续变量量子密钥分发的集成高性能纠错

Integrated high-performance error correction for continuous-variable quantum key distribution

针对连续变量量子密钥分发的纠错瓶颈，提出一种适合芯片集成的有限精度两阶段纠错方法，在商用FPGA上实现创纪录的吞吐量与安全密钥率，推动大规模城域量子网络部署。

Key Reconciliation with Low-Density Parity-Check Codes for Long-Distance Quantum Cryptography

The speed at which two remote parties can exchange secret keys over a fixed-length fiber-optic cable in continuous-variable quantum key distribution (CV-QKD) is currently limited by the computational complexity of post-processing algorithms for key reconciliation. Multi-edge low-density parity-check (LDPC) codes with low code rates and long block lengths were proposed for CV-QKD, in order to extend the maximum reconciliation distance between the two remote parties. Key reconciliation over multiple dimensions has been shown to further improve the error-correction performance of multi-edge LDPC …