A note on "new quantum key agreement protocols based on Bell states"

被引：0
|
作者：
Cao, Zhengjun [1 ]
Markowitch, Olivier [2 ]
机构：
[1] Shanghai Univ, Dept Math, Shangda Rd 99, Shanghai 200444, Peoples R China
[2] Univ Libre Bruxelles, Comp Sci Dept, Blvd Triomphe CP 212, B-1050 Bruxelle, Belgium
来源：
QUANTUM INFORMATION PROCESSING | 2021年 / 20卷 / 02期
关键词：
Quantum cryptography; Key agreement; Key transfer; Bell state;
D O I：
10.1007/s11128-021-03004-4
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We remark that the quantum key agreement protocol (Yang et al. in Quantum Inf Process 18(10):322, 2019) is flawed. It is unnecessary for Bob to prepare his secret key K-B, because it is finally announced and accessible to adversaries. We find, K-B has no relation to the confidentiality of the final agreed key K-AB = K-A circle plus K-B. It is just a key transfer scheme, not a general key agreement scheme. We also find there is short of a code for Bob to extract bits from the measured results.
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页数：5
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