Permutation attack and counterattack on the two-party quantum key agreement over a collective noisy channel

2020/09/15 by Jun Gu, Gu, Jun, Tzonelih Hwang +1
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2009.06871

openalex publication_date 2020/09/15 · openalex created_date 2020/09/21 · openalex updated_date 2026/07/28

Abstract

Recently, Yang et al. (Quantum Inf Process 18, 74, 2019) proposed a two-party quantum key agreement protocol over a collective noisy channel. They claimed that their quantum key agreement protocol can ensure both of the participants have equal influence on the final shared key. However, this study shows that the participant who announces the permutation operation can manipulate the final shared key by himself/herself without being detected by the other. To avoid this loophole, an improvement is proposed here.

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