Unconditionally secured classical cryptography using quantum superposition and unitary transformation

TL;DR

This paper proposes a classical cryptography method leveraging quantum superposition and unitary transformations to achieve unconditionally secure key distribution compatible with existing fiber-optic networks, addressing quantum loopholes.

Contribution

It introduces a novel classical cryptography approach that mimics quantum security principles, overcoming practical quantum cryptography limitations.

Findings

Achieves unconditional security through quantum superposition effects.

Compatible with current fiber-optic communication infrastructure.

Provides high-speed, secure key distribution in classical regimes.

Abstract

Over decades quantum cryptography has been intensively studied for unconditionally secured data transmission in a quantum regime. Due to the quantum loopholes caused by imperfect single photon detectors and/or lossy quantum channels, however, the quantum cryptography is practically inefficient and even vulnerable to eavesdropping. Here, a method of unconditionally secured key distribution potentially compatible with current fiber-optic communications networks is proposed in a classical regime for high-speed optical backbone networks. The unconditional security is due to the quantum superposition-caused measurement indistinguishability of a paired transmission channel and its unitary transformation resulting in deterministic randomness corresponding to the no-cloning theorem in a quantum regime.