摘要
给出了六态扩展BB84协议的Breidbart基窃听方案 ,分析并计算了各种截取 重发策略下的Alice Eve平均交互信息量和施行QKD标准纠错手续后的有效平均交互信息量 ,结果显示Breidbart基窃听 Breidbart基重发策略 (B B策略 )最为有效 .考虑到Alice和Bob可以在公开讨论阶段利用废弃数据检验是否存在B B窃听以降低秘密性增强算法的强度 ,减少量子密钥的损失 ,提出了修改BB84协议的建议 .
We discuss the Breidbart eavesdropping scheme of the extended BB84 quantum key distribution protocol. Calculation of the effective average Alice/Eve mutual information after performing a standard error-correction under various intercept/resend strategies shows that the Breidbart eavesdropping/Breidbart resend strategy(B/B strategy) is the most effective one. Sine Alice and Bob can test openly whether there is the B/B eavesdropping by making use of the rejected data, we suggest an amendment of the BB84 protocol to reduce the requirements of the privacy amplification algorithm and hence reduce the quantum key loss. Finally, we present a quantum key regeneration method for error-correction which may be more secure than the standard error-correction process.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第5期961-965,共5页
Acta Physica Sinica
基金
中国科学院 (信息安全国家重点实验室 )知识创新工程项目
广州市科技攻关计划项目
中国博士后科学基金资助的课题~~
