Multi-party Quantum Private Comparison Protocol Based on Entanglement Swapping of Bell Entangled States

• URL: http://arxiv.org/abs/2205.04008v1
• Date: Mon, 9 May 2022 02:28:13 GMT
• Title: Multi-party Quantum Private Comparison Protocol Based on Entanglement Swapping of Bell Entangled States
• Authors: Tian-Yu Ye
• Abstract summary: In this paper, we put forward a three-party quantum private comparison protocol based on entanglement swapping of Bell entangled state. We generalize the three-party protocol into the multi-party case, which can accomplish arbitrary pair's comparison of equality among users within one execution.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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