论文标题
多方量子私人比较协议基于铃铛纠缠状态的纠缠交换
Multi-party Quantum Private Comparison Protocol Based on Entanglement Swapping of Bell Entangled States
论文作者
论文摘要
最近，Liu W等。提出了使用铃铛纠缠状态的纠缠纠缠（Commun。Phys。57（2012）583-588）的两党量子私人比较（QPC）协议。随后，Liu W J等。指出，在Liu W等人的协议中，TP可以提取两个用户的秘密输入，而无需通过启动Bell-Basis测量攻击来检测到，并建议对相应的改进来修补此漏洞（Commun。Phys。62（2014）210-214）。在本文中，我们首先指出了上述两个协议中存在的TP的信息泄漏问题，然后通过使用单向哈希功能加密两个用户的秘密输入来提出相应的改进。我们进一步提出了三方QPC协议，还基于铃铛纠缠状态的纠缠交换，然后详细验证其输出正确性及其安全性。最后，我们将三方QPC协议推广到多方案例中，该案例可以完成任意对在一个执行中的平等比较。
Recently, Liu W et al. proposed a two-party quantum private comparison (QPC) protocol using entanglement swapping of Bell entangled state (Commun. Theor. Phys. 57(2012)583-588). Subsequently, Liu W J et al. pointed out that in Liu W et al.'s protocol, the TP can extract the two users' secret inputs without being detected by launching the Bell-basis measurement attack, and suggested the corresponding improvement to mend this loophole (Commun. Theor. Phys. 62(2014)210-214). In this paper, we first point out the information leakage problem toward TP existing in both of the above two protocols, and then suggest the corresponding improvement by using the one-way hash function to encrypt the two users' secret inputs. We further put forward the three-party QPC protocol also based on entanglement swapping of Bell entangled state, and then validate its output correctness and its security in detail. Finally, we generalize the three-party QPC protocol into the multi-party case, which can accomplish arbitrary pair's comparison of equality among users within one execution.
