Quantum Secure Multi-party Summation Based on entanglement swapping

TL;DR

This paper introduces a quantum protocol for secure multi-party summation using entanglement swapping of $d$-level states, enabling distrustful parties to compute sums securely with a semitrusted third party.

Contribution

It proposes a novel quantum multi-party summation protocol utilizing entanglement swapping and a semitrusted third party, enhancing security in distrustful environments.

Findings

Protocol is secure against common attacks

Uses entanglement swapping of $d$-level states

Allows secure summation with a semitrusted third party

Abstract

In this paper, we present a quantum secure multi-party summation protocol, which allows multiple mutually distrustful parties to securely compute the summation of their secret data. In the presented protocol, a semitrusted third party is introduced to help multiple parties to achieve this secure task. Besides, the entanglement swapping of $d$-level cat states and Bell states is employed to securely transmit message between each party and the semitrusted third party. At last, its security against some common attacks is analyzed, which shows that the presented protocol is secure in theory.