Improving the security of multiparty quantum secret sharing based on entanglement swapping against participant attack

Details Improving the security of multiparty quantum secret sharing based on entanglement swapping against participant attack Improving the security of multiparty quantum secret sharing based on entanglement swapping against participant attack

2006-12-09

arxiv.org/abs/quant-ph/0612066v1

Physics

Quantum Physics

6 pages, 3 figures

Scientific paper

In a recent paper [Z. J. Zhang and Z. X. Man, Phys. Rev. A 72, 022303(2005)], a multiparty quantum secret sharing protocol based on entanglement swapping was presented. However, as we show, this protocol is insecure in the sense that an unauthorized agent group can recover the secret from the dealer. Hence, we propose an improved version of this protocol which can stand against this kind of attack.

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