How to Verify Identity in the Continuous Variable Quantum System?

TL;DR

This paper introduces a new continuous variable quantum identification protocol that leverages two-mode squeezed vacuum states and teleportation, enabling secure, bidirectional identity verification in quantum communication systems.

Contribution

The paper presents a novel CV-QI protocol utilizing two-mode squeezed states and decoy sequences, with comprehensive security analysis ensuring its robustness.

Findings

Protocol achieves secure bidirectional identity verification.

Security analysis confirms protocol's robustness against attacks.

Utilizes decoy states to enhance security during verification.

Abstract

Continuous variable quantum cryptography has developed rapidly in recent decades, but how to verify identity in the continuous variable quantum system is still an urgent issue to be solved. To solve this problem, we propose a continuous variable quantum identification (CV-QI) protocol based on the correlation of two-mode squeezed vacuum state and the continuous variable teleportation. The bidirectional identity verification between two participants of the communication can be achieved by the proposed CV-QI protocol. In order to guarantee the security, we make full use of the decoy state sequences during the whole process of the proposed CV-QI protocol. Besides, we provide the security analyses of the proposed CV-QI protocol, and analyses indicate that the security of the proposed CV-QI protocol is guaranteed.