中文摘要：

在量子密钥分发系统中,私密放大是合法通信双方提取共享安全密钥的一个必不可少的环节。本文主要介绍了实现私密放大的两种加速算法,采用将两种加速算法进行有效组合的方法,既可以保证私密放大的安全性,同时又有效地减少了运算的操作次数。在连续变量量子密钥分发实验系统中,采用上述组合加速算法,实现了安全密钥的提取。

英文摘要：

Privacy amplification is an essential part of distilling highly secret shared information in quantum key distribution. Two accelerating algorithms used for privacy amplification are introduced in this paper. The combination of the two accelerating algorithms not only has the merits of high security, but also effectively reduces the computation time. By using the combined algorithm, we have achieved secret-key distillation for continuous variable quantum key distribution.