Master Key Secured Quantum Key Distribution

TL;DR

This paper introduces a novel quantum key distribution scheme utilizing three entangled particles in a GHZ state, enhancing security by incorporating a master key and leveraging Quantum Disentanglement Eraser, with extensions to multi-partite systems.

Contribution

It proposes a new quantum key distribution protocol using GHZ states and a master key, offering increased security over standard protocols like BB84.

Findings

Scheme is more resistant to non-ideal conditions

Utilizes Quantum Disentanglement Eraser concept

Extended to multi-partite quantum systems

Abstract

A new scheme of Quantum Key Distribution is proposed using three entangled particles in a GHZ state. Alice holds a 3-particle source and sends two particles to Bob, keeping one with herself. Bob uses one particle to generate a secure key, and the other to generate a master-key. This scheme should prove to be harder to break in non-ideal situations as compared to the standard protocols BB84 and Eckert. The scheme uses the concept of Quantum Disentanglement Eraser. Extension to multi-partite scheme has also been investigated.