Security of Binary Modulated Continuous Variable Quantum Key Distribution under Collective Attacks

TL;DR

This paper analyzes the security of binary modulated continuous variable quantum key distribution under collective attacks, providing an achievable secret key rate considering arbitrary noise in quantum channels.

Contribution

It introduces a security analysis framework for CV-QKD with binary modulation under collective attacks, accounting for arbitrary channel noise.

Findings

Derived an achievable secret key rate under collective attacks.

Considered arbitrary noise in quantum channels.

Applied homodyne detection and reverse reconciliation in the protocol.

Abstract

We give an achievable secret key rate of a binary modulated continuous variable quantum key distribution schemes in the collective attack scenario considering quantum channels that impose arbitrary noise on the exchanged signals. Bob performs homodyne measurements on the received states and the two honest parties employ a reverse reconciliation procedure in the classical post-processing step of the protocol.