CAJ | 학술논문

在量子密钥分发协议中，光子传输很微弱且不能被放大，在接收端极可能出现部分光子被丢失或未被检测到的情况，导致接收端收到的光子序列中出现缺失，使量子密钥分发协议效率更低，针对该问题，提出使用重传机制。根据缺失光子的位置，由发送方重新随机生成相应的二进制位序列、基序列和相应的光子序列，对其进行传输，直到没有出现光子缺失或满足一定阈值为止；理论分析该协议的可实现性、安全性和分发效率。使用重传机制能够有效增加接收端接收到的有效二进制串的位数，扩大了窃听检测区间，显著提高量子密钥分发效率。
재양자밀약분발협의중，광자전수흔미약차불능피방대，재접수단겁가능출현부분광자피주실혹미피검측도적정황，도치접수단수도적광자서렬중출현결실，사양자밀약분발협의효솔경저，침대해문제，제출사용중전궤제。근거결실광자적위치，유발송방중신수궤생성상응적이진제위서렬、기서렬화상응적광자서렬，대기진행전수，직도몰유출현광자결실혹만족일정역치위지；이론분석해협의적가실현성、안전성화분발효솔。사용중전궤제능구유효증가접수단접수도적유효이진제천적위수，확대료절은검측구간，현저제고양자밀약분발효솔。
In quantum key distribution protocol ,the photon transmissions are very weak and cannot be amplified in transit ,the receiver finds that some photos are lost in transit or fail to be counted by imperfectly‐efficient detectors ,which results in that deficient photon sequence received by receivers ,aggravating the inefficiency of quantum key distribution .In view of this kind of situation ,the retransmission mechanism was proposed .According to the position of the missed photons ,the sender randomly regenerated binary bit string ,basis sequence and corresponding photon sequence ,and retransmitted these missed photons until no missing photons were found or a certain threshold was met .A theoretical analysis was done to verify implementability ,securi‐ty ,and key distribution efficiency of the QKD protocol .Using the retransmission mechanism can increase the number of effective binary bits at the receiver ,and enlarge the eavesdropping detection range ,meanw hile improve the efficiency of quantum key dis‐tribution significantly .