A protocol for multiparty quantum secret splitting (MQSS) with an ordered $N$ Einstein-Podolsky-Rosen (EPR) pairs and Bell state measurements is recently proposed by Deng {\rm et al.} [Phys. Lett. A 354(2006)190]. We analyzed the security of the protocol and found that this protocol is secure for any other eavesdropper except for the agent Bob who adopts intercept-and-resend attack. Bob can obtain all the information of Alice's alone without being found. We also propose an improved version of the MQSS protocol.
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机译:Deng {\ rm et al。} [Phys。来吧A 354(2006)190]。我们分析了该协议的安全性,发现该协议对除监听和重发攻击的代理Bob以外的其他任何窃听者都是安全的。鲍勃可以独自获得爱丽丝的所有信息,而不会被发现。我们还提出了MQSS协议的改进版本。
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