# From Classical to Semi-Quantum Secure Communication

## TL;DR

This paper introduces a flexible quantum key distribution protocol that transitions from classical to semi-quantum, analyzing how quantum resources impact security and revealing interesting properties of the protocol.

## Contribution

It presents a novel tunable QKD protocol and provides an information-theoretic security analysis of its quantum-classical transition.

## Key findings

- Protocol smoothly transitions between classical and semi-quantum regimes
- Security depends on the level of quantum resources used
- Reveals properties of quantum resource requirements for secure communication

## Abstract

In this work we introduce a novel QKD protocol capable of smoothly transitioning, via user-tuneable parameter, from classical to semi-quantum in order to help understand the effect of quantum communication resources on secure key distribution. We perform an information theoretic security analysis of this protocol to determine what level of "quantumness" is sufficient to achieve security, and we discover some rather interesting properties of this protocol along the way.