Secure Direct Communication based on Ping-pong Protocol

TL;DR

This paper explores a secure direct communication protocol using a three-particle GHZ state within the ping-pong framework, enhancing quantum communication by allowing simultaneous information reception and analyzing eavesdropping threats.

Contribution

It introduces a novel secure direct communication scheme based on a three-particle GHZ state in the ping-pong protocol, enabling simultaneous multi-party communication.

Findings

Eavesdropping on the traveling particle can be detected.

The protocol allows secure direct communication without shared secret keys.

The use of GHZ states enhances security and efficiency.

Abstract

Communication security with quantum key distribution has been one of the important features of quantum information theory. A novel concept of secured direct communication has been the next step forward without the need to establish any shared secret key. The present paper is based on the ping-pong protocol with three particle GHZ state as the initial state where the receiver can simultaneously receive information from two parties. Possible eavesdropping on the travelling particle has been examined.