Collusion attack and counterattack on the quantum key agreement via non-maximally entangled cluster states
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Publication:2241018
DOI10.1007/S10773-020-04695-8zbMATH Open1498.81068arXiv2010.10002OpenAlexW3119538517MaRDI QIDQ2241018
Publication date: 5 November 2021
Published in: International Journal of Theoretical Physics (Search for Journal in Brave)
Abstract: Recently, Li et al. (Int J Theor Phys: DOI: 10.1007/s10773-020-04588-w, 2020) proposed a multiparty quantum key agreement protocol via non-maximally entangled cluster states. They claimed that the proposed protocol can help all the involved participants have equal influence on the final shared key. However, this study points out a loophole that makes Li et al.'s protocol suffer from a collusion attack, i.e. several dishonest participants can conspire to manipulate the final shared key without being detected by others. To avoid this loophole, an improvement is proposed here.
Full work available at URL: https://arxiv.org/abs/2010.10002
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