Cryptanalysis of a new circular quantum secret sharing protocol for remote agents

Cryptanalysis of a new circular quantum secret sharing protocol for remote agents In a recent paper (Lin and Hwang in Quantum Inf Process, 2012. doi: 10.1007/s11128-012-0413-8 ), a new circular quantum secret sharing (QSS) protocol for remote agents was presented. The protocol is designed with entangling a Bell state and several single photons to form a multi-particle GHZ state. For each shared bit among n party, the qubit efficiency has reached 1/2n + 1 which is the best among the current circular QSS protocol. They claim that the protocol is more suitable for a remote agents’ environment as that the newly generated photons are powerful enough to reach to the next receiver. However, we show that the protocol is not secure as the first agent and the last agent in the protocol can illegally obtain all the secret messages without introducing any error. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Cryptanalysis of a new circular quantum secret sharing protocol for remote agents

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Publisher
Springer US
Copyright
Copyright © 2012 by Springer Science+Business Media, LLC
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-012-0461-0
Publisher site
See Article on Publisher Site

Abstract

In a recent paper (Lin and Hwang in Quantum Inf Process, 2012. doi: 10.1007/s11128-012-0413-8 ), a new circular quantum secret sharing (QSS) protocol for remote agents was presented. The protocol is designed with entangling a Bell state and several single photons to form a multi-particle GHZ state. For each shared bit among n party, the qubit efficiency has reached 1/2n + 1 which is the best among the current circular QSS protocol. They claim that the protocol is more suitable for a remote agents’ environment as that the newly generated photons are powerful enough to reach to the next receiver. However, we show that the protocol is not secure as the first agent and the last agent in the protocol can illegally obtain all the secret messages without introducing any error.

Journal

Quantum Information ProcessingSpringer Journals

Published: Aug 10, 2012

References

  • Conjugate Coding
    Wiesner, S.
  • Quantum secret sharing without entanglement
    Guo, G.P.; Guo, G.C.
  • Multiparty secret sharing of quantum information based on entanglement swapping
    Li, Y.; Zhang, K.; Peng, K.
  • An efficient quantum secret sharing scheme with Einstein-Podolsky-Rosen pairs
    Deng, F.G.; Long, G.L.; Zhou, H.Y.
  • Multiparty quantum secret sharing of secure direct communication
    Zhang, Z.J.

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