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基于实际量子密钥分配系统中所使用的强衰减的激光脉冲并不是单光子,量子密钥分配的信道不是无损耗的,窃听者的技术能力也不是无限的这些具体问题,采用了分束窃听与截获重发窃听策略相结合的方案讨论了窃听问题并给出了合法用户在筛选后的密钥中所能容忍的误码率上限
Based on the fact that the strong decaying laser pulse used in the actual quantum key distribution system is not a single photon, the quantum key distribution channel is not lossless, and the technical abilities of the eavesdroppers are not limited to these specific problems. The scheme combined with intercepting retransmission tapping strategies discusses the eavesdropping problem and gives the upper bound of the bit error rate that legal users can tolerate in the filtered keys