A practical quantum encryption protocol with varying encryption configurations

TL;DR

This paper introduces a quantum encryption protocol that dynamically varies encryption configurations based on previous blocks, enhancing security through quantum states and demonstrating robustness against mock attacks.

Contribution

The paper presents a novel quantum encryption protocol that adapts encryption settings based on prior blocks, adding a new layer of security in quantum cryptography.

Findings

Numerical simulations show high error rates for mock attacks.

The protocol effectively encrypts the English alphabet.

The method offers a promising addition to quantum cryptography tools.

Abstract

Quantum communication is an important application that derives from the burgeoning field of quantum information and quantum computation. Focusing on secure communication, quantum cryptography has two major directions of development, namely quantum key distribution and quantum encryption. In this work we propose a quantum encryption protocol that utilizes a quantum algorithm to create blocks of ciphertexts based on quantum states. The main feature of our quantum encryption protocol is that the encryption configuration of each block is determined by the previous blocks, such that additional security is provided. We then demonstrate our method by an example model encrypting the English alphabet, with numerical simulation results showing the large error rate of a mock attack by a potential adversary. With possible future improvements in mind, our quantum encryption protocol is a capable addition to the toolbox of quantum cryptography.