Experimental realization of secure multi-party computation in an entanglement access to network

TL;DR

This paper demonstrates an experimental entanglement access network enabling secure multiparty quantum computation, specifically a privacy-preserving sum protocol, by sharing costly entangled photon sources among multiple users.

Contribution

It introduces a cost-efficient entanglement access network and experimentally demonstrates secure multiparty computation within this framework.

Findings

Successful implementation of a secure sum protocol over the network

Shared entanglement resource reduces costs for multiple users

First experimental realization of secure multiparty computation in an entanglement network

Abstract

To construct a quantum network with many end users, it is critical to have a cost-efficient way to distribute entanglement over different network ends. We demonstrate an entanglement access network, where the expensive resource, the entangled photon source at the telecom wavelength and the core communication channel, is shared by many end users. Using this cost-efficient entanglement access network, we report experimental demonstration of a secure multiparty computation protocol, the privacy-preserving secure sum problem, based on the network quantum cryptography.