量子密钥分发产品随机数芯片阵列方案研究

Research on random number chip array scheme for quantum key distribution products

针对量子密钥分发(QKD)技术的市场化需求,提出一种应用于QKD产品的随机数源实现方案及高速自检算法。采用商用的WNG-8噪声源搭建芯片阵列作为随机数源,并通过异或的方式提升随机数可靠性。根据国家相关标准要求,基于现场可编程门阵列(FPGA)设计了一种高速扑克自检算法方案,通过优化判断策略,并对检测数据流实行乒乓切换控制和并行统计,实现了3.8 Gbps的处理带宽,并预留进一步提升至10 Gbps处理带宽的能力,以满足未来高速QKD产品随机数源实时检测需求。

Aiming at the market demand of quantum key distribution(QKD)technology,a random number source implementation scheme and high-speed self-check algorithm for QKD products are proposed.Commercial WNG-8 noise source chip is used to build chip array as the random number source in the system,and the reliability of random number is improved by means of XOR process.According to relevant national standards,a high-speed Poker self-check algorithm scheme is designed based on FPGA.By optimizing the decision strategy,implementing the Ping-Pong switching control and parallel statistics of the random data flow,the processing bandwidth of 3.8 Gbps is realized,which could be further improved to 10 Gbps to meet the real-time checking requirement for future high speed QKD products.