Quantum key secure communication protocol via enhanced superdense coding

TL;DR

This paper introduces a novel quantum key secure communication protocol that enhances superdense coding, offering a practical alternative to existing quantum cryptography methods with successful implementation on accessible quantum platforms.

Contribution

The paper proposes a new QKSC protocol utilizing enhanced superdense coding, addressing limitations of QKD and QSDC, and demonstrates its practical feasibility on two quantum platforms.

Findings

Successful implementation on two free access quantum platforms

Addresses loopholes in existing QKD and QSDC methods

Provides a practical alternative for quantum secure communication

Abstract

In the last decades, Quantum Cryptography has become one of the most important branches of Quantum Communications with a particular projection over the future Quantum Internet. It is precisely in Quantum Cryptography where two techniques stand out above all others: Quantum Key Distribution (QKD), and Quantum Secure Direct Communication (QSDC). The first one has four loopholes relating to the exposure of the key at all points in the communication system, while the second has clear practical implementation problems in all its variants currently in use. Here, we present an alternative to QKD and QSDC techniques called quantum key secure communication (QKSC) protocol with a successful implementation on two free access quantum platforms.