Collusion Attack and Counterattack on the Quantum Key Agreement Via Non-maximally Entangled Cluster States

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Abstract

Recently, Li et al. (Int J Theor Phys: DOI: https://doi.org/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.

Original languageEnglish
Pages (from-to)331-337
Number of pages7
JournalInternational Journal of Theoretical Physics
Volume60
Issue number1
DOIs
Publication statusPublished - 2021 Jan

All Science Journal Classification (ASJC) codes

  • Mathematics(all)
  • Physics and Astronomy (miscellaneous)

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