量子密码协议的错误序列模型分析

An analysis of the model of the error bits of quantum cryptography protocol

量子密码协议具有无条件安全特性,其安全性通过窃听检测来保证.为了提高信息序列错误率的估计值精确度,提出了一种错误序列模型分析方法,通过构造法得到错误序列的二阶统计特性,从而通过经典方法对信息序列中错误序列进行预测,最后得到信息序列的错误率.在单次运行协议情况下,提高了窃听检测的精度,适用于其他量子密码协议.

Quantum cryptography protocols have the feature of unconditional security,which is ensured by attack-detection.A new method is introduced to improve the precision of the estimation of the error rate in the information bits.With the new technique,more information about the error bits can be obtained,then the value of error rate of the information bits can be obtained by classical signal estimation.This method can improve the precision of attack-detection within a single running of all quantum cryptography protocols.