# Quantum Conference

## TL;DR

This paper introduces the concept of quantum conference as a secure multiparty communication protocol using quantum resources, proposing two efficient protocols and analyzing their security and practicality.

## Contribution

It defines quantum conference, proposes two secure protocols, and demonstrates their relation to quantum key distribution and existing schemes.

## Key findings

- Protocols are secure and efficient.
- Can be implemented with entangled states and operators.
- Reduce to quantum key distribution and earlier schemes.

## Abstract

A notion of quantum conference is introduced in analogy with the usual notion of a conference that happens frequently in today's world. Quantum conference is defined as a multiparty secure communication task that allows each party to communicate their messages simultaneously to all other parties in a secure manner using quantum resources. Two efficient and secure protocols for quantum conference have been proposed. The security and efficiency of the proposed protocols have been analyzed critically. It is shown that the proposed protocols can be realized using a large number of entangled states and group of operators. Further, it is shown that the proposed schemes can be easily reduced to protocol for multiparty quantum key distribution and some earlier proposed schemes of quantum conference, where the notion of quantum conference was different.