Practical challenges in quantum key distribution

TL;DR

This paper reviews the practical challenges faced by quantum key distribution, including issues like key rate, distance, size, cost, and security, and discusses current approaches to overcome these hurdles.

Contribution

It provides a comprehensive survey of the key practical challenges in QKD and the methods being developed to address them.

Findings

Identification of main practical challenges in QKD

Overview of current solutions and research directions

Highlighting areas needing further development

Abstract

Quantum key distribution (QKD) promises unconditional security in data communication and is currently being deployed in commercial applications. Nonetheless, before QKD can be widely adopted, it faces a number of important challenges such as secret key rate, distance, size, cost and practical security. Here, we survey those key challenges and the approaches that are currently being taken to address them.