Improving the security of multiparty quantum secret sharing against Trojan horse attack

Fu-Guo Deng, Xi-Han Li, Hong-Yu Zhou, and Zhan-jun Zhang

Phys. Rev. A 72, 044302 – Published 18 October 2005; Erratum Phys. Rev. A 73, 049901 (2006)

Abstract

We analyzed the security of the multiparty quantum secret sharing (MQSS) protocol recently proposed by Zhang, Li, and Man [Phys. Rev. A 71, 044301 (2005)] and found that this protocol is secure for any other eavesdropper except for the agent Bob who prepares the quantum signals as he can attack the quantum communication with a Trojan horse. That is, Bob replaces the single-photon signal with a multiphoton one and the other agent Charlie cannot find this cheating as she does not measure the photons before they run back from the boss Alice, which reveals that this MQSS protocol is not secure for Bob. Finally, we present a possible improvement of the MQSS protocol security with two single-photon measurements and four unitary operations.

Received 23 June 2005

DOI:https://doi.org/10.1103/PhysRevA.72.044302

Erratum

Erratum: Improving the security of multiparty quantum secret sharing against Trojan horse attack [Phys. Rev. A 72, 044302 (2005)]

Fu-Guo Deng, Xi-Han Li, Hong-Yu Zhou, and Zhan-jun Zhang

Phys. Rev. A 73, 049901 (2006)

Authors & Affiliations

Fu-Guo Deng^1,4,5, Xi-Han Li^1,4,5, Hong-Yu Zhou^1,4,5, and Zhan-jun Zhang^2,3

¹The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China
²School of Physics and Material Science, Anhui University, Hefei 230039, China
³Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
⁴Institute of Low Energy Nuclear Physics and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, China
⁵Beijing Radiation Center, Beijing 100875, China

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Issue

Vol. 72, Iss. 4 — October 2005

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