Quantum key distribution with quantum walks

TL;DR

This paper introduces new quantum key distribution protocols leveraging quantum walks, including a secure one-way scheme and a semi-quantum variation, with proven security against various attacks.

Contribution

It presents novel quantum key distribution schemes based on quantum walks, with security proofs and verification procedures against man-in-the-middle and eavesdropping attacks.

Findings

Secure quantum key distribution protocol with verification against man-in-the-middle attacks

A one-way quantum key distribution protocol with proven security

A semi-quantum variation demonstrating robustness against eavesdropping

Abstract

Quantum key distribution is one of the most fundamental cryptographic protocols. Quantum walks are important primitives for computing. In this paper we take advantage of the properties of quantum walks to design new secure quantum key distribution schemes. In particular, we introduce a secure quantum key-distribution protocol equipped with verification procedures against full man-in-the-middle attacks. Furthermore, we present a one-way protocol and prove its security. Finally, we propose a semi-quantum variation and prove its robustness against eavesdropping.