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Erschienen in:
01.02.2021 | Comment
A note on “new quantum key agreement protocols based on Bell states”
Erschienen in: Quantum Information Processing | Ausgabe 2/2021
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Abstract
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 \(K_{AB}=K_A\oplus K_B\). 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.