信息调和过程的终止  

Termination of Information Reconciliation Process

作　　者：包小敏[1] 

机构地区：[1]西南大学数学与统计学院,重庆400715

出　　处：《通信技术》2010年第5期30-33,37,共5页Communications Technology

基　　金：重庆市自然科学基金计划资助项目(NO.CSTC2006BB2325);西南大学科技基金资助项目(NO.SWNUB2005019)

摘　　要：信息调和是量子密钥分配及无条件安全密钥分配中的一个重要步骤,其目的是通过公开可认证信道交换纠错信息把两个不相同的比特串变成相同的串。目前已知的方案都存在信息调和过程不能及时终止的问题。提出了一个终止信息调和过程的方案,其主要思想是先根据已有的试验结果所确定的轮数r对比特串进行r轮信息调和,然后再利用纠错码来检查剩余的两个比特串是否相同,并在不相同的情况下进行纠错。该方案具有轮数确定、效率高的特点,尤其是在比特对信息调和的情况下,通信双方每一轮交换的信息,不论是纠错码的纠错信息还是二分法的校验和信息,都可以一次发送给对方,这样可以减少双方在公开信道上交换信息的次数。还基于比特对信息调和协议,利用Hamming码和(24,12)Golay码进行一致性验证,按此方法进行了模拟。Information reconciliation is an important step in both quantum key distribution and unconditional secure key distribution,with the purpose to transform the two non-identical bit strings into two identical ones by exchanging error-correcting information through an authenticated public channel.However,the present known schemes all have the problem that the reconciliation process couldn＇t be terminated in good time.In this paper,a new scheme for terminating information reconciliation process is proposed,the main idea is to perform r（the value of r is determined by existing experiment results） round of reconciliations first,and then use error-correcting code to check if the two bit strings are identical or not,and if not,errors are corrected.In the new scheme,the round number of reconciliations is fixed and thus a higher efficiency could be achieved,particularly in the case of bit pair reconciliation,all the information exchanged in each round between the two communicating parties,no matter it is the error correction information for error correction code or the parity check sums for bisection method,could be send to the other party all in one time,so the number of information exchanges performed on public channel could be reduced.Simulation on the scheme,which is based on bit pair reconciliation protocol and uses Hamming code or（24,12） Golay code for identical verification,is also performed.

关 键 词：密钥分配 信息调和 比特串 相关系数 伴随式 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]