Three-party quantum private comparison of equality based on genuinely maximally entangled six-qubit states

TL;DR

This paper introduces a novel three-party quantum private comparison protocol leveraging genuinely maximally entangled six-qubit states, enabling secure, efficient, and privacy-preserving equality checks without external help or complex operations.

Contribution

The protocol uniquely uses genuinely maximally entangled six-qubit states and eliminates the need for unitary encoding, enhancing security and simplicity in quantum private comparison.

Findings

Protocol is secure against outside and participant attacks

Uses one-step quantum transmission for efficiency

Does not require unitary operations for encoding

Abstract

We propose a new three-party quantum private comparison protocol using genuinely maximally entangled six-qubit states. In our protocol, three participants can determine whether their private information are equal or not without an external third party who helps compute the comparison result. At the same time the participants can preserve the privacy of their inputs, respectively. Our protocol does not need any unitary operations to encode information due to the excellent properties of genuinely maximally entangled six-qubit states. Additionally, the protocol uses one-step quantum transmission and it is congenitally free from Trojan horse attacks. We have also shown that our protocol is secure against outside and participant attacks in this paper.