Quantum secure direct communication based on supervised teleportation

TL;DR

This paper proposes a quantum secure direct communication scheme utilizing supervised teleportation, extending a previous entanglement sharing protocol, and evaluates its security against specific attack strategies.

Contribution

It introduces a novel QSDC protocol based on supervised teleportation and analyzes its security robustness against out of control attacks.

Findings

The scheme enables direct secure message transmission via teleportation.

Security analysis shows robustness against out of control attacks.

The protocol extends existing entanglement sharing methods for secure communication.

Abstract

We present a quantum secure direct communication(QSDC) scheme as an extension for a proposed supervised secure entanglement sharing protocol. Starting with a quick review on the supervised entanglement sharing protocol -- the "Wuhan" protocol [Y. Li and Y. Liu, arXiv:0709.1449v2], we primarily focus on its further extend using for a QSDC task, in which the communication attendant Alice encodes the secret message directly onto a sequence of 2-level particles which then can be faithfully teleported to Bob using the shared maximal entanglement states obtained by the previous "Wuhan" protocol. We also evaluate the security of the QSDC scheme, where an individual self-attack performed by Alice and Bob -- the out of control attack(OCA) is introduced and the robustness of our scheme on the OCA is documented.