Intercept-Resend Attacks on Semi-quantum Secret Sharing and the Improvements

Jason Lin, Chun Wei Yang, Chia Wei Tsai, Tzonelih Hwang

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


Recently, Li et al. [Phys. Rev. A 82(2):022303, 2010] presented two semi-quantum secret sharing (SQSS) protocols using Greenberger-Horne-Zeilinger-like states. The proposed schemes are quite practical because only the secret dealer needs to be equipped with advanced quantum devices such as quantum memory, whereas the other agents can merely perform classical operations to complete the secret sharing. However, the present study demonstrates the existence of a security pitfall in the eavesdropping check phase of both the schemes, which can lead to an intercept-resend attack and a Trojan horse attack on the two schemes by a dishonest agent, to determine the other agent's shadow and consequently derive the master key of the SQSS. This contradicts the security requirement of QSS. Fortunately, two possible solutions are proposed herein to eliminate this security pitfall.

Original languageEnglish
Pages (from-to)156-162
Number of pages7
JournalInternational Journal of Theoretical Physics
Issue number1
Publication statusPublished - 2013 Jan

All Science Journal Classification (ASJC) codes

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


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