Quantum Public Key Distribution using Randomized Glauber States

TL;DR

This paper introduces a new quantum key distribution method utilizing randomized Glauber states over optical channels, enhancing security features like path authentication and attack mitigation, inspired by classical public key concepts.

Contribution

It presents a novel QKD mechanism based on randomized Glauber states, combining quantum principles with classical public key ideas for improved security.

Findings

Proposes a quantum key distribution method using randomized Glauber states.

Provides physical countermeasures for path authentication and attack prevention.

Leverages QPKE, uncertainty principle, and DPSK modulation for security enhancement.

Abstract

State-of-the-art Quantum Key Distribution (QKD) is based on the uncertainty principle of qubits on quantum measurements and is theoretically proven to be unconditionally secure. Over the past three decades, QKD has been explored with single photons as the information carrier. More recently, attention has shifted towards using weak coherent laser pulses as the information carrier. In this paper, we propose a novel quantum key distribution mechanism over a pure optical channel using randomized Glauber states. The proposed mechanism closely resembles a quantum mechanical implementation of the public key envelope idea. For the proposed solution, we explore physical countermeasures to provide path authentication and to avoid man-in-the-middle attacks. Other attack vectors can also be effectively mitigated by leveraging the QPKE, the uncertainty principle and the DPSK modulation technique.